X hits on this document

30 views

0 shares

0 downloads

0 comments

4 / 11

In particular. . . The Partial Derivatives Must Exist

If the partial derivatives don’t exist at the point (a,b), the function f cannot be locally planar at (a,b).    

Example:  (as given in text)  A cone with vertex at the origin cannot be locally planar there, as it is clear that the x and y cross sections are not differentiable there.

Document info
Document views30
Page views30
Page last viewedTue Jan 17 15:59:41 UTC 2017
Pages11
Paragraphs43
Words393

Comments