vesperala

At 15:15 those vectors should be twice long that you draw them.

At 22:57, the third statement there is quite the proof that the gradient is orthogonal on level curves. I mean is 0 change in f means that is a level curve there.

Thank you for the videos, are very interesting.

Thank you!

About the joke... I am not sure if I hear well.

Did you said "what are you doing in her space"? if yes, then maybe you should say "what are you doing in his space"...

Is it?

Of course it could be a girl mathematician and her boyfriend, but is useless to tell you about this symmetry property of ...

can you upload some talks?

@celine7966 je ne savais pas que je "dois" écrire ici ce que j avais retenu de ce video pour te faire du plaisir.

non, j avais exprimé seulement la premiere impression, rien de plus... et rien de moins.

c est tout.

1 person is deaf. I feel sorry for him/her

@PriscillaHartje he is a Romanian from Moldavia

this song is in French language, ideed

Mulţumim! La mulţi ani tuturor!

57 - ils ne veulent pas