Yesterday I studied inverse matrix from a textbook (not as a student but just to acquire knowledge) and did manual calculations. Today morning, I was thinking of it's usage in real life and then realized that we can use it for encoding and decoding of a message. So, my curiosity brought me to your channel. Now I feel that I can apply my theoretical knowledge of inverse matrix practically. Its fun actually. Thank you for showing the examples beautifully. But try to use less of calculators. Manual calculations are the best way to explain and teach.
Yeah, you can do the whole thing multiplying the matrices by hand. I chose to use the calculator to save time. You'd need to look up how to find the inverse of a 2x2 matrix, and how to multiply by hand. (Honestly, I can't remember if I made any of those videos, but there are good ones out there.)
Thanks but I have a question.. What if the number is not even I mean for example word "hard work" =8 1 18 4 0 23 15 18 11 Which matrix will be formed here, are we going to ignore the 0 or what?
The only rule in this situation is that your message matrix must have two rows. It can have as many columns as needed. No need to apologize. We're all beginners at something.
Nah, not a genius. But I do have a lot of experience trying to make difficult things easier to understand, and trying to help students who are struggling. I'm glad I could help.
Texas Instruments had a free program you could download, but you had to connect your calculator to the computer using a proprietary cable and extract a certain file from it. That kept people from just using the software and not buying a calculator. I don't know if it's still available or not. If I was still teaching this topic, I'd have students use the matrix multiplier available from Desmos or some other application.
The fact that my prof taught the EXACT SAME CONCEPT WITH THE EXACT SAME EXAMPLE and i still couldn't understand until i saw this video
I'm glad it was helpful
Yesterday I studied inverse matrix from a textbook (not as a student but just to acquire knowledge) and did manual calculations. Today morning, I was thinking of it's usage in real life and then realized that we can use it for encoding and decoding of a message. So, my curiosity brought me to your channel. Now I feel that I can apply my theoretical knowledge of inverse matrix practically. Its fun actually. Thank you for showing the examples beautifully. But try to use less of calculators. Manual calculations are the best way to explain and teach.
You saved my life thank you so much
This man has saved me on my test
Glad I could help
thank you you saved my life
You sir, are a helpful genius!!
You saved my life thank you
من طرف استاذة ريم جايين ندعمك💪🏻
I have the newest casio fx-82au plus II calculator and i have no idea how to use matrix in that calculator, do u by any chance know how?
No experience with that calculator. Sorry. I'd either have to use the manual or find help videos.
You’ll need a graphical calculator if u go to school in Australia, those bloody expensive $200 ones lmao
@@kyal OH, i downloaded a matrix calculator off playstore XD
Cool video but could you do it without the calculator? I need this for a test and they aren't allowed inside.
Yeah, you can do the whole thing multiplying the matrices by hand. I chose to use the calculator to save time. You'd need to look up how to find the inverse of a 2x2 matrix, and how to multiply by hand. (Honestly, I can't remember if I made any of those videos, but there are good ones out there.)
Thanks but I have a question.. What if the number is not even I mean for example word "hard work" =8 1 18 4 0 23 15 18 11
Which matrix will be formed here, are we going to ignore the 0 or what?
Wonderful question. Put an extra zero at the end and you should be good to go.
@@djnechodom thank you very much🙏
what if we get -ve values like -23 when we decode?
Probably an error in calculation or setup. Can you post a photo? I might be able to help.
I think then we can solve it as (27 - 23)th alphabet so 27-23 = 4 therefore 'D'
Thanks so much for your help....
Thanks sir very helpful.
How to get the key if I am a third person wants to decode the message??
Espionage. :-) I saw some methods years ago in a linear algebra class I was taking in college, but I don't remember them.
Sir can I take any encoding matrix or there is any rule ? ( I am really beginner)
The only rule in this situation is that your message matrix must have two rows. It can have as many columns as needed.
No need to apologize. We're all beginners at something.
Did I address your question? If not, I'm willing to help.
@@djnechodom Am i bound to take square matrix? ( Because when I am decoding again I am multiplying by its inverse)
@@rannnniiiiii with this type of encoding and decoding, your coding matrix must be square, so your decoding matrix will be also.
@@djnechodom ok thank you
Thank you Sir,very good explanation
What is the advantage of using this rather than OTP?
what is OTP
@@davidossantos1346look up for it
If I was investing and got that message stocks would've dumped before I encypt it
Your are a genius , Thank you so much
Nah, not a genius. But I do have a lot of experience trying to make difficult things easier to understand, and trying to help students who are struggling. I'm glad I could help.
how to create that graphic calculater
Texas Instruments had a free program you could download, but you had to connect your calculator to the computer using a proprietary cable and extract a certain file from it. That kept people from just using the software and not buying a calculator. I don't know if it's still available or not.
If I was still teaching this topic, I'd have students use the matrix multiplier available from Desmos or some other application.
THAAAAANNNKKNK YOOOOUUU!!!!
How did we get the key?
That's an excellent question, Hansika. You and the person you're communicating with must agree on the key.
So if there is an odd number of letter, add a 0 as a place holder
Excellent observation, yes, your Matrix has to have something in it, and any other number would mess it up.
thanks very helpful
Very helpful :)
thank you sir very help full thank you so much sir
Glad to help
Perfect
Maths are so cool
Thanks
SELL NOW
Witchcraft
Yeah, pretty much ;-)
Wrong method!
That is the method I was teaching. I'm curious what other method you are looking for.