19.02.2013 Views

regular smooth curve - Penn Math

regular smooth curve - Penn Math

regular smooth curve - Penn Math

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

To produce the �-tube about this <strong>curve</strong>, we define<br />

by<br />

F: {0 � s � L} � {t 2 + u 2 < �} � R 3<br />

F(s, t, u) = x(s) + t N(s) + u B(s) .<br />

Then the partial derivatives of F are given by<br />

Fs = (1 � t �(s) T(s) � u �(s) N(s) + t �(s) B(s)<br />

Ft = N(s)<br />

Fu = B(s)<br />

46

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!