How to hit a vector with a matrix? 😳

Great ❤

Summary: Hit vector v with matrix A we get the new vector v'. Now if angle between v and v' is <= 90' which means it doesn't changes direction it means its positive semi definite and if its < 90'(see its strictly less no equal sign) then its positive definite matrix. great video

Thank you so much sir.

aye thanks

Thank you a lot. This is much intuitive and better than long technical calculations.

good work

gang gang good stuff doc

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Sir your videos are a great explanation to complex concepts. Please make more videos on other concepts. Thank you.

Great explanation,,,Thanks sir...🙏

If this concept is exactly like he has explained, then it's really amazing video 💯

He was God! Such a clear explanation

Legendary. Thank you for blessing the world with this video.

Dot product between matrix A and the vector?! Not sure if I follow... so you mean A.x is a dor product with a result that is a scalar, let's call it S, and If S>0 then A is positive definite?! I thought we had to do xAx to get that scalar S!

Amazing Video!!

Months of struggle in understanding and forgetting every time came to end. I guess I would never forget this concept. Thanks much.

Thankyou soooo much brother. This really helped me out!!!

man explained just one topic so well he had to disappear..

elite explanation

Can we get more such videos?

Great illustrations thank you so much

thanks!

Thank you so much Sir

Nice!

wow wish my lectures are taught by you

great explanation

fantastic description! thanks !

This is a great one

Really, thank you!

By visualizing we get a better, intuitive idea of the concept. Superb explanation! Thank you!

Brilliant explanation!

Good explanation but soooo much repetition :D

You are a fucking Legend...Prof Strang took 50 mins to explain this and you did it in 5 :-)

This is brilliant.

thank you! Easy to understand and I love being able to have geometric interpretations for this stuff

Sir please make more It is going to help us a lot

super

This makes a lot of sense , thank you ! Can you provide some usefulness of these matrices ?

I love you prerana

Really interesting visualization! I never thought of it that way but it’s right there in the definition. Thanks!

Great intuition. Thank you very much!

Truly appreciated.

Great understanding

I guess this tutor has served as a submarine engineering in army😂😂

This is sick. Thanks!

thank you a lot Sir!

Bro! im a grad student. Thank you so fucking much/!!!!! Dont need mit profs. Need you!!!!