MA 229 : Problem set 7 Due on April 1st 2019 1. Exercise 4 of Chapter 7 §34 of Munkres, page 291. 2. Exercise 6 of Chapter 7 §34 of Munkres, page 291-2. 3. Exercise 4 of Chapter 7 §37 of Munkres, page 308. 4. Exercise 6 of Chapter 7 §37 of Munkres, page 309. 5. (a) Parametrize the surface in R4 given by the equations x21 + x22 = 1, x23 + x24 = 4. (b) Integrate the 2-form x1 x2 dx2 ∧ dx3 over this surface. (c) Compute d(x1 x2 dx2 ∧ dx3 ). (d) Represent the surface as the boundary of a three-dimensional manifold in R4 , and verify that Stokes’ theorem is true in this case.
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