Mathematics Homework Solutions

Proving a Set E is Compact

Please see the attached file for the fully formatted problems. Let lambda n be a real decreasing sequence converging to Prove E is compact if and only if = 0. I am assuming compactness here refers to the sequential compactness. This seems to make the most sense. Since this problem is an analysis problem, please be ...continues

Sequential Compactness

Please see the attached file for the fully formatted problems. Consider C[0, 1], the space of real valued continuous functions defined on the unit interval [0, 1]. Let K = C1[0, 1] {f : Z 1 0 f02  1, ||f||1  1} Note that C1[0, 1]  C[0, 1], and K  C[0, 1]. Show that K is compact in C. I am assuming compactness h ...continues

Maximum 1

Please see the attached PDF file. Thank You.

Real Analysis : Finding a Maximum using Lagrange Multipliers

Please see the attached file for the fully formatted problem. What is the maximum of F = x1 +x2 +x3 +x4 on the intersection of x21 +x22 +x23 + x24 = 1 and x31+ x32+ x33+ x34= 0? As this is an analysis question, please be sure to be rigorous and as detailed as possible.

Poincare's Lemma and its Converse

Please see the attached file for the fully formatted problem. For  phi E C2[R3 ! R3], curl grad phi = 0. Prove this. The converse is ”Poincare’s Lemma”: if f E C1[R3 --> R3] and if curl f = 0, then f is a gradient, i.e., f = grad  for some  2 C2. Try it this way: if f = grad phi, then phi (x1, x2, x3) = phi(0)+ .... ...continues

Laplacian : Grad and Curl Proof

Please see the attached file for the fully formatted problems. Show that for f E C2(R3 --> R3), grad x curl =grad(div f) - DELTA f

Critical Point : Non-Degenerate

Please see the attached file for full problem description. Show that f(x) = x1x2 + x2x3 + x3x1 has a non - degenerate critical point at x = 0 and describe the shape of f as concretely as possible.

Jacobian Matrix of a Function and its Inverse

Please see the attached file for the fully formatted problems.

Gradient and Curl

Please see the attached file for the fully formatted problems.

Maximum

Please see the attached PDF file. Thanks! I would like someone other than OTA#103746 or 101620 to attempt a solution.

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