19:53

50 - Exterma subject to constraints

20:46

25 - Limits along curves

6:49

how is e^e^x=1 solvable??

58:21

56 - Operations on linear maps

11:36

finding critical points of a multivariable function

27:53

38 - The gradient

39:07

48 - Minima and maxima

27:40

26 - Limits and polar coordinates