Talk:Second fundamental form
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Something here is wrong:
The second fundamental form is a bilinear operator. II(u,v) is a number, not a vector. Why are we taking inner products of numbers?
68.1.154.81 (talk) 21:11, 13 March 2008 (UTC)
- Thanks for catching that. At this point in the text, the second fundamental form refers to a normal-bundle valued bilinear form (i.e., it's vector valued, not scalar valued). I have added a section break to set up the contrast a little better, but it probably needs still more clarification. silly rabbit (talk) 21:33, 13 March 2008 (UTC)