Multiple Choice
The 2-manifold M in R4 given by the equations 0 < x4 < 1,
0 < < 1 has normals It is oriented by the 2-form
ω(x) ( v1 , v2 ) = det( n1 n2 v1 v2 ) . Let be a parametrization for M. Which of the following statements is true?
A) P is orientation preserving for M.
B) P does not determine an orientation for M.
C) P is orientation reversing for M, but no orientation preserving parametrization for M exists.
D) P is orientation reversing for M, but q(u) = ( , 5
,
, -2
) would be orientation preserving parametrization for M.
E) P is orientation reversing for M, but q(u) = (- , 5
,
, 2
) would be an orientation-preserving parametrization for M.
Correct Answer:
Verified
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