# 1234

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Please answer my bounties, easy 50 points going I believe (not that I find it easy)!

# 170 Questions

 4 Use of Poincare Lemma in solving $\nabla \times \textbf{A}(\textbf{r})=\frac{\textbf{r}}{r^3}$ 4 Solving awkward quadratic equation to obtain “nice” solution. 3 Why does the support of measure on $\mathbb{R}^n$ exist? 3 Problem with notation in a thesis 3 Best textbook for Geometric Measure Theory

# 628 Reputation

 +5 Problem integrating in problem using the Poincaré Lemma +5 Identity of the pushforward of a vector field using a Jacobi bracket. +10 Use of Poincare Lemma in solving $\nabla \times \textbf{A}(\textbf{r})=\frac{\textbf{r}}{r^3}$ +5 Proving $[L_X,i_Y]=[i_X,L_Y]=i_{[X,Y]}$

 2 Proving that $\lim\limits_{n \to \infty}\dfrac{5^n}{n!} = 0$ 2 Prove that $\lim_{n\rightarrow \infty} \int_{0 }^{\pi} \frac{\sin(nx)}{nx}dx=0$ 1 Can basis vectors have fractions? 1 Orthonormal basis of vector space 1 Solving First Order Separable Differentials

# 144 Tags

 6 real-analysis × 12 1 calculus × 34 2 linear-algebra × 22 1 differential-equations × 19 2 limits × 7 1 matrices × 4 2 improper-integrals 1 absolute-value 2 probability-limit-theorem 0 measure-theory × 43

# 6 Accounts

 Mathematics 628 rep 319 Quantitative Finance 187 rep 6 TeX - LaTeX 171 rep 5 Mathematica 106 rep 2 Stack Overflow 105 rep 5

 +50 Use of Poincare Lemma in solving $\nabla \times \textbf{A}(\textbf{r})=\frac{\textbf{r}}{r^3}$ +50 Identity of the pushforward of a vector field using a Jacobi bracket. +50 Problem integrating in problem using the Poincaré Lemma