Introduction to Matrices (2 of 3: Notation & Basic Manipulation)

[teyo]

I almost had no idea why matrices work like that. But now i know and that was just awesome. :)

[juliaimenis]

This man deserves a best teacher award! He can make you understand anything!! Legit saved my life

[sebbes]

*WHY!* is a smaller whiteboard bolted onto a bigger whiteboard?
That is an equal area to the smaller whiteboard (+ edges) that can't be used! WHY!!!?
Like use a black tape or something to create the "sectioning" that the smaller whiteboard (WB) provides & use the smaller WB someplace else.

[nishitkrsingh]

Everyone should have a teacher like u!!!!💜💜💜💜💜💜💜♡♡♡♡♡♡♡♡♡♡

[christmasisawesome]

Damn. I have never visualized it this way before. Thank you Eddie Woo.

[doctorcatnip]

Why is the board in the middle of another board?

[terrykhan]

I was following along, but you lost me at the 2nd block of the matrix. Why did you rewrite the 2nd row in the 3rd block? If you added the two equations in the 2nd block, wouldn't "7 0 21" represent both equations?

[sheelapathak]

Why he is making the coefficient 0 and 1 please explain

[markconley]

@ 4' 55" no worries with the first two matrices but in the third you add them together for the first row but do nothing with the second row; isn't apparent how you can do that ? it is not the same as the second matric as there the top row is still the same value as in the first matrix
any help appreciated, mark

[itrstt]

Is there a relation with binary code? Like it seems The value for either constant os activated through The corresponding binary arrangement for The same given value...
Like The value for a is 3 because in a 2bit binary there is The One in the a position and the something alike for b

[johnessien]

This guy is making me want to learn maths all over again at 34 years old, just for fun. Evil eyes to my high school math teachers and textbooks!!!
It's just not his ability to break the concept down into a very digestible form. It's also his ability to build theatrics into the teaching. He starts the lecture without telling the students what they are going to learn, then throws them a basic problem all of them can solve easily building trust and confidence. Then relates the concepts to a new way of solving problems showing how easily it can be understood and then after building the suspense for a while, voila the big reveal. And you can hear the gasps and aahhhs from the students. Hard to forget things that give you a WOW moment. Interesting, even I, who knew the topic, still got the Wow effect. Awesome teaching technique.

The other possibly under-appreciated trick with the way his lecture is structured is how he did not introduce the topic at the start. This is because some students at hearing what the topic was may have frozen from fear due to possibly previous stories about the complexities of the subject. Introducing them to how simple the subject really could be without already causing some people to shut off is an amazing teaching idea.

I want to say, I wish this guy was my maths teacher, but I won't because heck with my venture into the world of Data Science, he is going to be my math teacher. Thanks to technology for making guys like this accessible to the world, for free for that matter

[BookLoversPizza]

How do we write the 'equals sign' in a matrix if there are a different amount of values in the equations?

[grill-surf-bust]

What a fantastic demonstration. By only manipulating one row at a time, you let students lean on existing intuition of algebra while seeing how the notation plays out. You've already shown them matrix addition and multiplication. They just don't know it yet.

[markconley]

assuming matrix three is ok, then no worries with matrix four ...

[markconley]

at 4'55" two pupils shouted out, "what?" and so did i at home to the monitor ...