Lecture 29(A): Quadratic Forms: Necessary & sufficient conditions for definiteness

[@tayoukachukwu3105]

Very clear and to the point. Thanks a million for your generosity in providing these videos. You are saving souls in Africa

[@ArizonaMathCamp]

Not sure I'd go quite that far, but I'm glad they're helpful. Thanks for the positive feedback!

[@fariedabuzaid9604]

Thanks for the videos. A nice and clear refresher on the topic! However, I believe that the explanation for the case a=0 is not correct. Even if a=0, Q(x) = xAx is still a quadratic from and hence Q(x)=Q(-x).

[@ArizonaMathCamp]

You're right: the result is correct, but the explanation is nonsense -- a dumb mistake that you're the first person to point out. Thanks!

[@md.rifatsharif7158]

hand writing is not good for viewer to understand

[@ArizonaMathCamp]

You're right ... the marker I used in this video was apparently worn down too much. I'll need to re-do it. Thanks for pointing this out, and thanks for watching!

[@caulcw2048]

@@ArizonaMathCamp So A PDF will be helpful.

[@alexwillbury7622]

His handwriting is perfectly fine, gosh I can't with these random ppl benefiting from his free lectures (which takes time and effort to create and publish) yet still commented to nitpick the weirdest thing + ask for handouts instead of a simple thank you? you were not taught how to show respect and it shows

[@alexwillbury7622]

@@ArizonaMathCamp You're incredibly kind. I'm grateful to you and your TA for being here for us!

[@ArizonaMathCamp]

@@alexwillbury7622 I'm glad you're finding them helpful!