Mathematics
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User8976
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An equation means nothing to me unless it expresses a thought of God. — Srinivasa Ramanujan

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All Questions Answers
Score Newest
question
33
The series $\sum_{n=1}^\infty\frac1n$ diverges!
Feb 22, 2015
question
28
Proving that the triangle inequality holds for a metric on $\mathbb{C}$
Jan 14, 2015
question
21
To show that orthogonal complement of a set A is closed.
Feb 21, 2015
question
14
Difficulty in finding a counterexample
Jan 25, 2015
answer
12
How to evaluate $\int_0^\pi \cos(x) \cos(2x) \cos(3x) \cos(4x)\, dx$
Jan 27, 2017
question
10
To find the minimum value of $|z+1|+|z-1|+|z-i|$ where $z\in \Bbb C$.
Feb 23, 2016
question
10
$n^3+n<3^n$ for $n \geq4$ by induction.
Sep 8, 2018
question
10
Let $(X,d)$ be a compact metric space. Let $f: X \to X$ be such that $d(f(x),f(y)) = d(x,y)$ for all $x,y \in X$. Show that $f $ is onto (surjective).
Feb 13, 2015
answer
8
Find $(1008)!\equiv ?\pmod {2017}$
Oct 20, 2017
question
8
If $x, y \in X$ with $x \neq y$, then there exists $f \in X^*$ such that $f(x) \neq f(y)$.
Sep 22, 2017
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