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45 Linear Algebra Versus Functional Analysis Aug 18 '16
13 How do I solve equation $\bar{z} = |z|$ correctly? Jul 26 '16
12 Integrate $\int\frac{x+1}{\sqrt{1-x^2}} \; dx$ without using trigonometric substitution Jul 18 '16
9 Why dense subsets are convenient to prove theorems Jul 17 '17
8 Advice on how to overcome obstacles in studying Abstract Algebra May 12 '17
8 How to be good at coming up with counter example in Topology Apr 25 '19
8 What is a rigorous proof that $\bigcap [n , \infty)$ is empty Aug 11 '16
7 The Readability of Rudin's “Real and Complex Analysis.” Aug 23 '16
7 Suppose $U_1,\dots,U_k$ and $V_1,\dots,V_k$ are $n\times n$ unitary matrices. Show that $\|U_1\cdots U_k-V_1\cdots V_k\|\leq\sum_{i=1}^k\|U_i-V_i\|$ Mar 15 '19
6 Compactness in normed vector spaces. May 8 '19
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