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Ishan Banerjee
  • Member for 9 years, 6 months
  • Last seen more than 6 years ago
35 votes
6 answers
25k views

$AB-BA=I$ having no solutions

16 votes
2 answers
873 views

Evaluating $\int_0^{\infty}\frac{e^{-x}}{1+x^2}dx$

15 votes
4 answers
668 views

Finding $\int^1_0 \frac{\log(1+x)}{x}dx$ without series expansion

13 votes
1 answer
2k views

Rational points on a circle with centre $(\pi, e)$

10 votes
3 answers
753 views

Value of $\sum_{k=1}^{\infty}\frac{1}{k^2+a^2}$

7 votes
2 answers
933 views

Uniqueness of Tetration

7 votes
4 answers
299 views

Intermediate value-like theorem for $\mathbb{C}$?

7 votes
1 answer
145 views

Limit of $a_{k+1}=\dfrac{a_k+b_k}{2}$, $b_{k+1}=\sqrt{a_kb_k}$?

6 votes
1 answer
1k views

Convergence of nested radicals

4 votes
1 answer
61 views

How does this method to find the centre work?

4 votes
1 answer
2k views

A Limit of a sum related to the exponential series.

4 votes
3 answers
828 views

Why can't this be a coset?

3 votes
1 answer
86 views

Approximating an integral with elementary functions

3 votes
1 answer
380 views

Tangent space to lie group at identity.

2 votes
2 answers
327 views

Problem with understanding proof of Van Kampen's theorem

2 votes
2 answers
191 views

Set of natural number solutions to $x^2+y^2=z^2$

2 votes
1 answer
100 views

Limit of a 31st order linear recurrence

1 vote
2 answers
355 views

Lemma about Brouwer degree in Milnor's book

1 vote
1 answer
56 views

Countably many APs partitioning the natural numbers