The Art of Linear Programming

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  • Опубликовано: 25 ноя 2024

Комментарии • 432

  • @johankotze42
    @johankotze42 Год назад +265

    This is so interesting. I am retired now, but the last 20 years of of my working life was spent managing a dynamic truck allocation system in an opencast mine. I was mostly involved in the IT/IM side, but I knew the optimization was done with the simplex algorithm. Over the years, however, I got the impression that all the graduated industrial engineers did not understand what they were working with.I'll rewatch all of this a number of times.

    • @IxCIHAoX
      @IxCIHAoX Год назад +8

      @johankotze42 Interesting, i always wondered how an industrial engineer would apply Operations Research in pratice. We had to calculate the simplex by hand, but i always thought i would just use some excel plugin. I'll soon graduate in industrial engineering and am curious about key skills that you dont learn in uni. If you don't mind, what would you like to see more in upcoming IEs?

    • @greatcanadianmoose3965
      @greatcanadianmoose3965 Год назад

      @@IxCIHAoX I mean look up the excel solver... I've learnt both doing it by hand, as well as excel, though currently I'm learning GUSEK to solve these problems!

    • @fabio.1
      @fabio.1 11 месяцев назад

      👀

    • @lu3tz
      @lu3tz 2 месяца назад

      @@IxCIHAoX I am an industrial engineer working as an operations research scientist in logistics. What I'd look for in a ie grad is decent programming skills (python/java/scala/c/c++/c# I don't care which), basic knowledge in statistics, basics in data handling and visualization and most importantly knowledge in OR and that does not mean simplex. Can you model mixed integer linear problems? Can you spot weak points in your model (big-M, symmetry, ...)? Can you write your model in your programming language of choice (for example python + pulp)? And maybe know a thing or two about heuristic solution approaches (greedy, local search, tabu search, genetic algorithms....)

  • @mathfincoding
    @mathfincoding Год назад +159

    I took multiple operations research classes in undergrad and I'm taking math graduate classes now. I never truly understood the connection between the primal and the dual problem until now. My mind is blown. Thank you so much!!!!!!!

    • @payrimdwein9082
      @payrimdwein9082 Год назад +5

      just saw this after my course finished, this is good!

    •  Год назад +1

      The way I always understood it is that most problems are either seen as you taking up resources to maximize a profit or you are minimizing your wasted money by emptying out your storage space.
      In the example, you are either making potatoes/carrots to get a profit or you are essentially trying to use as much seeds and fertilizers as possible to have the least waste.

    • @jainickvishani5185
      @jainickvishani5185 Год назад

      EXACTLY, I just finished my finals last week and I see this video explaining the whole damn course 😂

  • @spb1179
    @spb1179 Год назад +98

    This topic has to be one of the most important things I’ve seen this year. So useful. That’s crazy what you could do with this.

  • @Noxafurry
    @Noxafurry 5 месяцев назад +5

    This is some 3Blue1Brown quality level of quality! I am genuinely shocked by how good this video and the explanation is! Thank you.

  • @prori5297
    @prori5297 22 дня назад +3

    18 mins of your video is more helpful than 4 hours at my class. Thank you so much

  • @bejoscha
    @bejoscha Год назад +126

    Perfect pace, well thought of outline, clean and helpful visuals, good narration - what is not to love about this? You've gained a subscriber.

  • @puneetkumarsingh1484
    @puneetkumarsingh1484 Год назад +7

    Took me 2 watches on separate days while thinking about it in between to fully understand the slack loosening and tightening concept. And when it clicked, it felt really beautiful and made sense! Thanks for making it so clear.

  • @sanjaykrish8719
    @sanjaykrish8719 6 месяцев назад +2

    Your work will impact generations to come and uplift the knowledge of people who are at a disadvantage. Thanks a lot

  • @Ocara31
    @Ocara31 Год назад +130

    Please, make about Non Linear Programming and also about Combinatorial Optimization. Your work is really fantastic!

  • @schwaartz
    @schwaartz Месяц назад +3

    Easily the best video on linear programming

  • @ehsanabbasi6218
    @ehsanabbasi6218 Год назад +6

    Truly impressed by this video! As an industrial engineer, it was a challenge to learn and visualize the concept of LP and SIMPLEX. What I learned in 19 minutes from this video is comparable to my 4-month university course. Now I wish you had created this video 3 years ago. Thanks!

  • @juanhbiancuzzo1490
    @juanhbiancuzzo1490 Год назад +11

    this is my first video of you that I've seen, and it's really amazing. i'm looking forward to seeing more videos in this series.

  • @Alexander-oh8ry
    @Alexander-oh8ry Год назад +282

    Im impressed by your website and ran hours deep into a mathematical rabbit hole on Wikipedia. Thanks, I unexpectedly learned a lot today! But i noticed that on your website, the description of the maximum independent set problem and minimum vertex cover problem are wrong and mashed together

    • @YTomS
      @YTomS  Год назад +117

      Thanks for the kind words and the comment (you're right, the definitions were incorrect), I updated the website.

    • @ColinTimmins
      @ColinTimmins Год назад +38

      @@YTomSStating the fact that you had a correction to make and corrected it gets an extra sub from me. Thanks for the content. I’m now getting back into programming. 😊

    • @socratesphilanthropy4937
      @socratesphilanthropy4937 Год назад +6

      I have heard black hole . Rabbit hole? Thanks 4 the new term from an indian

    • @markgreen2170
      @markgreen2170 Год назад

      @@socratesphilanthropy4937 and now we have a new one 'bonus hole'

  • @TrollFunMineMafia
    @TrollFunMineMafia Год назад +1

    i remember doing this in university and not understanding a thing, now it all makes way more sense! thank you

  • @priyanshugoel3030
    @priyanshugoel3030 Год назад +2

    Okay that explained slack,surplus and basic variables pretty well.

  • @OgsLike
    @OgsLike Год назад +8

    Wanted to say that besides your excellent knowledge on the subject, it’s an extremely rare and precious talent you have of teaching and presenting complex subjects in an accessible way. Your visuals, audio, pace and use of humour is exceptional. You have a multi-million dollar talent that I hope you benefit from!

  • @НиколайЗаднепровский

    I appreciate that you are giving the real meaning behind each step instead of just throwing some random numbers and math operations like most other creators do.

  • @protiumx
    @protiumx Год назад +22

    Thank you for all the work you put in these videos, I really learn a lot with them!

  • @teodorticu2628
    @teodorticu2628 Год назад +14

    I love your videos! It feels like you explain complex things in a way that really makes them easy to understand. Your content always triggers my interest and I find myself going into rabbit holes online lol. Keep it up!

  • @lunafoxfire
    @lunafoxfire Год назад +27

    I used linear programming to solve for optimal production chains in the game Satisfactory! I made an online tool and everything. To be honest I just discovered that it was a well studied class of problems and downloaded a library to do it for me, haha. I knew vaguely there was "something, something simplex method" going on under the hood but I never truly studied the algorithm. Cool to see the geometry of how it actually works!

    • @blackbriarmead1966
      @blackbriarmead1966 Год назад

      satisfactorycalculator?

    • @lunafoxfire
      @lunafoxfire Год назад +1

      @@blackbriarmead1966 I made "yet another factory planner". I would post the link but RUclips would probably eat it.

  • @ivanperica3731
    @ivanperica3731 8 месяцев назад

    My college professor was not bad, but this video is something else. Really utilising the technology to present complex topics in such an amazing way. I am aware of how complex and immensly time consuming these types of videos get, but please do continue making these.

  • @Efesus67
    @Efesus67 Год назад +4

    Wow, this is awesome. The knapsack problem almost feels like it could be posed in discreet probability theory: given a random variable X, find a finite subset A of X that will maximize E[A] (=sum of p_i•x_i) and the sum of the chosen values x_i do not exceed a number k.
    Thanks for your website!

  • @iFastee
    @iFastee Год назад +8

    cool... it would be nice to mention that most hard problems are non-linear, non-convex, can be part of the branch of discrete decisions where it becomes computationally unscalable to use certain linear algorithms, can be multimodal (or multiobjective)... and that's where heuristic and stochastic algorithms (that have a lot of generalizations of the linear programming field) enter to even try to tackle them

    • @lpi3
      @lpi3 Месяц назад

      That's why they are called "hard" problems. Isn't it?
      I would even say not "most hard problems", but _all_ hard problems ...

  • @VictorUn1
    @VictorUn1 Год назад +3

    I've just discovered your channel and when I finished the video I thought you would have more subscribers. The quality is mind-blowing, keep going !

  • @alejrandom6592
    @alejrandom6592 Год назад +8

    Wow this made me realize linear programming is a lot less boring than what school makes it look like. Great video ♡

  • @namesurname1869
    @namesurname1869 Год назад

    As an industrial engineering student who is currently studying integer LP this video has to be the best way to get a grasp of the topic. Looking forward to you getting deeper into these concepts.

  • @timelygoose
    @timelygoose Год назад +1

    The best explanation on this topic that I've come across, thank you sir!

  • @pedrocolangelo5844
    @pedrocolangelo5844 Год назад +18

    Seriously, I have not been this excited with a RUclips channel since I discovered 3blue1brown, and that must be about 3 years ago.
    Sir, what a masterpiece it is. Thanks for sharing it with us.

    • @macroxela
      @macroxela Год назад +1

      Check out Reducible, similar to 3blue1brown but about computer science topics. He's just as good.

  • @andrijor
    @andrijor 6 дней назад

    aahhh I'm hoping there is a next video some day. It's so nice to look back at the stuff I learned at uni!

  • @stjintje
    @stjintje Год назад +2

    Wow, well explained! I struggled to get through my linear programming course for 2 years, but you make it seem so simple!

  • @azfarahsan
    @azfarahsan Год назад

    WHERE WAS THIS VIDEO WHEN I WAS STUDYING LINEAR PROGRAMMING
    GOOD VIDEO CONGRATS 👏🏼👏🏼

  • @ShashankEarth
    @ShashankEarth Год назад

    Excellently explained!!! What a great visualization video. Waiting for more videos on Simplex and Dual Simplex. Thank you so much.

  • @xcoder1122
    @xcoder1122 Год назад +325

    The initial problem looks way too simple ... because it is. Of course you plant as many carrots as you can and fill the rest with potatoes. Probleme solved. To make the initial problem more complex, just add in two other factors: The amount of farmland is also limited and potatoes provide way more yield per square meter than carrots do. Yet carrots grow faster and you could sow and harvest carrots twice a season but potatoes only once. And there you have a problem you cannot solve in your head any longer, yet that is a real world problem a farmer might face.

    • @johankotze42
      @johankotze42 11 месяцев назад +6

      Your example reminds me of HP's examples in their old calculator (wire bound) manuals.

    • @terdragontra8900
      @terdragontra8900 11 месяцев назад +36

      that you system described is still linear so the algorithm would still work, but it would be harder for the viewer to follow as a first example

    • @chamorvenigo
      @chamorvenigo 10 месяцев назад +3

      I actually played a lot of those farm-themed diner-dash-like games that has this sort of problem. Back then, I didn't know much about how to apply linear algebra (even though I aced at all my maths subjects). I did know Excel and used it to verify hunches I had. Now that I know more, I could say that… I wish people would start with ratios and portions. Then, they know how to better do comparisons. When to do what in which order. When do we apply infinite series. When is a line a dot, a plane, or an angle. When do we use a relative scale, an informed absolute scale, or a straight-out bonkers mathematical absolute scale.

    • @OhsoLosoo
      @OhsoLosoo 7 месяцев назад +6

      Ah another Harvest moon enthusiast

    • @ismailchoudhury
      @ismailchoudhury 6 месяцев назад

      Wrong

  • @adolfninh23
    @adolfninh23 9 месяцев назад

    detail and down-to-earth explanation

  • @guitarljm
    @guitarljm 9 месяцев назад +1

    We need your next video!! Amazing stuff.

  • @albertn0855
    @albertn0855 Год назад

    This videos is inspiring to me as I'm considering operations research as my main field of study as an applied mathematician!

  • @UpsiteRealone
    @UpsiteRealone 4 месяца назад

    that was really fun to watch. Thanks man I haven't took a math class in a while but, I was decently good at understanding math. You have a great way of explaining things and I love it! Keep up the content made me realize how much I loved math when I was taking it back then!

  • @giovannihernandez3208
    @giovannihernandez3208 Год назад

    This is amazing. I could understand what the dual is more intuitively.

  • @sarkaholendova9080
    @sarkaholendova9080 6 месяцев назад

    Wow, what a quality! I am blown away. The best video yet! Thank you :)

  • @ishungchan
    @ishungchan 10 месяцев назад

    Thank you, I'm struggling with this course at my uni. Your video helps me understand it 🙏

  • @kofiboamah8242
    @kofiboamah8242 Год назад

    i got confused from 5:45 the loosening and tightening, simplex method... i even got more confused with the introduction of the slack variables... I have saved this video i hope to watch it several times till i get it. Thank you very much for a great video

  • @victormanuel8767
    @victormanuel8767 Год назад

    This is brilliant. You really blended theory and practical application into one cohesive whole.

  • @preston7376
    @preston7376 Год назад +1

    This is EXACTLY what I need to learn. One problem that came up at work was how to find the intersection of N half spaces in logarithmic time, and I couldn't understand the linear programming or the simplex method to do so... Will use this vid as a starting point to get into it. Thank you!

    • @rohith9875
      @rohith9875 Год назад

      What work do you do?

    • @preston7376
      @preston7376 Год назад +1

      @@rohith9875 graphics programming for CAD systems. Basically visual tools for modelling etc.

    • @rohith9875
      @rohith9875 Год назад

      @@preston7376 oh damn that's sounds pretty interesting

  • @white_archive
    @white_archive Год назад

    this is an absolutely amazing video. It's animations are so beautiful and illustrate the essence of the method. After watching the video, I can confidently say that I have some real understanding of linear programming! Thanks a lot!

  • @neobrandsainclair3407
    @neobrandsainclair3407 Год назад

    I struggled with linear programming when I was a student, but you explained it so well that it's easier for me to understand how it works. Thank you :)

  • @Mayurml-e3n
    @Mayurml-e3n 3 месяца назад

    Maths with storytelling, best video I ever watch❤

  • @feeelix
    @feeelix Год назад

    Awesome video! I believe it's only a matter of time until your channel takes off

  • @Spl3F
    @Spl3F 7 месяцев назад

    bro I'd pay to watch the continuation, very well explained!

  • @corlaez
    @corlaez Год назад

    I found the answer intuitively as soon as the problem was presented (which is super simple of course) but it was interesting to see (around the 9:22 mark) that my logic to arrive to that answer is exactly the Dantzig's pivot rule. Thanks for the video it is super interesting that this intuition of mine has been reinforced by this method and that it can apply to more complex inequalities and more dimensions!

  • @jackgude3969
    @jackgude3969 Год назад

    I really like the background music. Very cosy math video.

  • @samuelkhzym9442
    @samuelkhzym9442 Год назад

    Phenomenal video! We are going through the simplex method in my linear optimization class and it was very difficult to grasp the process, let alone the intuition behind it. Thank you for making it :)

  • @prathameshsundaram7509
    @prathameshsundaram7509 Год назад +1

    I love how thorough your videos are! Thanks a ton.

  • @Erik_The_Viking
    @Erik_The_Viking Год назад

    Beautiful video! Well done with a simple example to show the concepts.

  • @SebastianSchwank
    @SebastianSchwank Год назад +1

    I love the bot ❤ & it"s creators+intendors!

  • @ajk7868
    @ajk7868 Год назад

    You are amazing, I was hopping to find a mathematical channel like this

  • @CarterSherman-z6n
    @CarterSherman-z6n Год назад +1

    Phenomenal video. Very well explained. This is so helpful! Simple explanation, great work sir!.

  • @tatolela1234
    @tatolela1234 Год назад

    I dont usually writte comments, but in this time i had to. sincerely spectacular explanation.

  • @tunafllsh
    @tunafllsh Год назад +1

    Good job! This summarizes the course I took on LP.

  • @fawwazanvilen6625
    @fawwazanvilen6625 11 месяцев назад

    omg you showing duality was mindblowing

  • @electra_
    @electra_ Год назад +1

    I hope you make more videos on this subject! We mentioned linear programming in school, but not much more other than "yeah you can plug in numbers to this library and it works" which was quite dissapointing... i want to know how and why it works.

  • @AlleBalle54
    @AlleBalle54 Год назад +1

    great video, perfectly explained. Looking forward to the next one :)

  • @StentorCoeruleus
    @StentorCoeruleus 6 месяцев назад

    This is probably the most useful thing I’ve ever learned of since learning to breathe

  • @newtral6303
    @newtral6303 10 месяцев назад

    Please bring out more videos and continuation of this series on LP, ILP & MILP.

  • @jackninja1
    @jackninja1 Год назад +1

    Absolutely excellent explanation!

  • @princewaesen154
    @princewaesen154 9 месяцев назад

    you bothered to explain the concept of duality which my university prof just didn't feel like doing. Thank you

  • @bigjukebox3370
    @bigjukebox3370 Год назад +6

    very nice video! You really did a good job at explaining this concept very much intuitively :)
    actually, just a little improvement: When representing quantities or numbers with images or in this case circles, as you did at 14:56, one naturally compares the given shapes by their area they take up.
    Thus, a twice as heavy item having twice the height is a bit misleading, since the influence of the diameter is quadratic, and it should actually have √2 times the height.
    I mean, look how miniscule the 2kg circle looks in comparison to the 4kg one, even though it is just half of that, it certainly doesn't look like that - because the area is actually 1/4 of the 4kg one.
    And, intuitively, when thinking about them as wheights, it also makes a lot of sense to say that double the area of wheight makes for double the weight.
    So, just a thing for the future, when representing numbers as shapes, always think about the area, not their sidemeasures.
    Cheers!

    • @YTomS
      @YTomS  11 месяцев назад

      Makes total sense when you say it, didn't come to mind when making the video. Thanks, will keep in mind!

  • @juan.araujonog
    @juan.araujonog Год назад

    I just found your channel and this is so good. You should really be proud of your work!

  • @benwinstanleymusic
    @benwinstanleymusic Год назад

    Incredible video, thank you so much Tom! Helps so much with my optimisation course

  • @patiencebear
    @patiencebear Год назад

    0:16 - you clever bastard. Instant Like.
    Turned out, it's actually trivial.

  • @arhamhundia3039
    @arhamhundia3039 11 месяцев назад

    Amazing video really helped me understand, thank you, please keep on making more videos.

  • @BrickStopLA
    @BrickStopLA Год назад

    "Since planting a negative amount of seeds is difficult" I love it

  • @seanpe8474
    @seanpe8474 Год назад +1

    reminder that #SoME3 is ongoing, and this video definitely qualifies for it!

    • @YTomS
      @YTomS  Год назад

      This actually is my submission for #SoME3 (tagged in the description), I'll also add a link to the SoME3 post 🙂.

  • @gabedarrett1301
    @gabedarrett1301 Год назад

    Finally, an intuitive explanation of the simplex method! Your content matches that of 3blue1brown in terms of quality and ease of understanding! Subscribed
    Also, you might want to number the x1 and x2 tick marks

  • @andrewcpu
    @andrewcpu Год назад +1

    Wow, just found your channel. Love it.

  • @darshagarwal8307
    @darshagarwal8307 8 месяцев назад

    amazing stuff, I am working on recommender systems, and this has been quite helpful! You have just gained a subscriber :)))

  • @porschepanamera92
    @porschepanamera92 Год назад +2

    Very nice intro to LP. I've read about slack variables, and now they make more sense. I would love to see a follow-up to N variables, which makes it less intuitive without the geometric interpretation, and a brief note on convexity. Nonconvex optimization problems require some more exotic methods :)

  • @pablocasas1001
    @pablocasas1001 Год назад

    This video is simply wonderful please keep explaining linear programming(and hopefully any convex as well)

  • @Ennuendo
    @Ennuendo Год назад +1

    Saying that planting negative seeds is "difficult" rather than "impossible" made me laugh. Great video!

  • @fuuryuuSKK
    @fuuryuuSKK Год назад

    the fact that the Simplex method is called that, together with the similar objective and visualisation, made me remember Reducible's video on the GJK algorithm

  • @HughJazz13
    @HughJazz13 Год назад

    It's pretty amazing that you summarized the most important upper level Industrial (& Systems) Engineering course in under 20 minutes. When are you going to dive deeper into the iceberg??

  • @TheLoopesMan
    @TheLoopesMan Год назад +3

    Great work as usual boss

  • @WavyB1
    @WavyB1 Год назад

    i was waiting anxtiously. for the Brilliant AD. And was pleased that the video was just pure knowledge. Thank you. For this, here is a LIKE and SUBSCRIBE!!!

  • @DuongNguyen-dz8pb
    @DuongNguyen-dz8pb Год назад +1

    This is so helpful! Simple explanation, great work sir!

  • @kreuner11
    @kreuner11 Год назад +1

    the 3blue1brown animation system is gonna be a standard mathematical video type soon (like whitepaper styles), if not already being one

  • @nuirejuvini9951
    @nuirejuvini9951 Год назад +1

    I JUST had an exam in mathematics in the modern world and Im kicking myself rn bc i didnt find this video a few hours ago

  • @SteveRowe
    @SteveRowe 8 месяцев назад

    I will have to watch this a few more times, I got lost with the introduction of slack variables. I appreciate the explanation, though!

  • @RingingBellee
    @RingingBellee Год назад

    Only two minutes in, but the first problem heavily reminds me of the type of word problems I would see in the calculator section of the SAT when I was studying/taking it in high school.

  • @michaelangel7907
    @michaelangel7907 Год назад

    Great! superb graphics, clear explanations. thanks

  • @zoom8370
    @zoom8370 Год назад

    Nice one! This put a smile on my face.

  • @ZhenghaoChi
    @ZhenghaoChi 25 дней назад

    Extremely clear.

  • @hajhouj
    @hajhouj Год назад

    Wow really great video !!! Please a video on Non linear programming and KKT 🙏🙏

  • @maulanayafiedanendra431
    @maulanayafiedanendra431 5 месяцев назад

    Really cool. Would be amazing if you also do the explanation for the non linear programming.

  • @samarthtandale9121
    @samarthtandale9121 Год назад +1

    Love this video , really ❣️💯❣️

  • @debasiskar4662
    @debasiskar4662 Год назад

    Waiting for many more videos of similar type.

  • @FaffyWaffles
    @FaffyWaffles Год назад

    I love this use of Manim. So High Quality! New Subscriber is me.

  • @amarug
    @amarug Год назад +42

    very nicely made video. but somehow the whole loose/tight algorithm didn't really sink in. i have a PhD in engineering and done also courses in (applied) more advanced (for an engineer) math, such as a lot of numerical methods for pde's and differetial geometry, which always rapidly made sense to me. also the fundamental idea of the simplex is very clear, as long as its any kind of polygon, the extremum should always be in the vertex. i also assume, if its a geometrically convex polygon, the local extra will be a global one, thus making the problem convex as well. not sure why the description of the actual algorithm left me in such confusion. maybe because its 2am and im watch this on my phone under my blanket to no wake my wife 😂

    • @YTomS
      @YTomS  Год назад +14

      There are a number of ways of understanding what simplex algorithm does and if you have background in other areas of mathematics, then the "operations-on-a-matrix" one might be most sensible. However, when I was first learning about the algorithm, a geometric illustration of what's happening under the hood would have gone a long way, which is why I created the video :).

    • @controlequebrado4455
      @controlequebrado4455 Год назад +5

      I would hazard a guess it's because of the lack of emphasis on the preamble of concepts like tight, loose, and what they geometrically mean.
      But @TomasSlamaYT implicitly left that as an "exercise for the viewer" by giving those "pause and think" moments

    • @frogi1660
      @frogi1660 Год назад +6

      Yeah, I don't get it either. Loose/tight is a very weird choice of word which probably gives some intuition to some people, but for me it's just confusing and unclear.

    • @anon1963
      @anon1963 Год назад

      What is the point of writing a useless dissertation that no one will ever read? And spend 4 years on it 💀

    • @amarug
      @amarug Год назад +6

      @@anon1963 It was fun to do, learned a lot of stuff and it payed 85k a year in average, so why not ;)

  •  Год назад

    Thank-you for this! Or should I say - děkuju?
    Finally someone from my country using manim and creating videos that I really enjoy watching!
    Keep up the great work - you have a sub from me :) Měj se!

  • @bugs-hl5jf
    @bugs-hl5jf Год назад

    Really amazing explanation. Thank you.

  • @ridazouga4144
    @ridazouga4144 Год назад

    Maaan thaaaanks for sharing this amazing content👏👏👏👏

  • @innokentiyromanchenko1450
    @innokentiyromanchenko1450 Год назад +3

    thanks for your videos, they are excellent