4. For the cylinder with patch (a) Find the normal vector U. (b) The Gauss X(u, v) = (R cos u, R sin u, v), equals 0. map is G(u, v) = U. Find the derivative dG of the Gauss map. (c) Verify that the shape operator S(Xu) = −Vxu U equals 1 Xu and S(Xv) = -VXv U R (d) From the previous part, you know a matrix for the shape operator is s- (- / 0) S= R 1 H = = trace(S). 2 Use this information to find the Gauss curvature K = det(S) and the mean curvature

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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4. For the cylinder with patch
(a) Find the normal vector U.
X(u, v) = (R cos u, R sin u, v),
(b) The Gauss map is G(u, v) = U. Find the derivative dG of the Gauss map.
(c) Verify that the shape operator S(Xu) = -Vxu U equals
equals 0.
(d) From the previous part, you know a matrix for the shape operator is
S
-(-9)
trace(S).
1
Xu and S(Xv) = -VXv U
R
=
Use this information to find the Gauss curvature K = det(S) and the mean curvature
1
H=-
2
Transcribed Image Text:4. For the cylinder with patch (a) Find the normal vector U. X(u, v) = (R cos u, R sin u, v), (b) The Gauss map is G(u, v) = U. Find the derivative dG of the Gauss map. (c) Verify that the shape operator S(Xu) = -Vxu U equals equals 0. (d) From the previous part, you know a matrix for the shape operator is S -(-9) trace(S). 1 Xu and S(Xv) = -VXv U R = Use this information to find the Gauss curvature K = det(S) and the mean curvature 1 H=- 2
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