Help with Polar Decomposition Proof
139087
polar decomposition of a square A when A is not full rank/invertible
140024
How to obtain the gradient in polar coordinates
24656
Proving that $\frac{\csc\theta}{\cot\theta}-\frac{\cot\theta}{\csc\theta}=\tan\theta\sin\theta$
46308
Simultaneous diagonlisation of two quadratic forms, one of which is positive definite
123198
Partial Fraction Decomposition?
106011
Proving it has all real roots
2251
Can someone give me a hint on how to prove this?
145759
formal proof from calulus
147886
Proof of the angle sum identity for $\sin$
4240
The proof of Triple Vector Products
105293
Proof of the second symmetric derivative
86193
Rigorous proof that $dx dy=r\ dr\ d\theta$
75625
Complete residue system proof
61539
proof for a basis in $L^2$
94958
Prob. 6 (d), Chap. 1, in Baby Rudin, 3rd ed: How to complete this proof?
57215
Stuck on formal proofs. Not sure how to continue
103501
Question about a normal equation proof