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An expert is a man who has made all the mistakes, which can be made, in a very narrow field. (Niels Bohr)


20h
answered Show that a matrix has positive determinant
20h
reviewed Approve suggested edit on Taylor Series for $(1-x)^p$
21h
revised Percolation and number of phases in the 2D Ising model.
Correction of mistakes in writing.
1d
revised Different methods to compute $\sum\limits_{n=1}^\infty \frac{1}{n^2}$
added 2 characters in body
1d
awarded  Necromancer
2d
revised $ d(x,y)^2 \le d(x,z)^2 - d(y,z)^2\color{}{+\varphi\big(x,y,z,d(x,y),d(y,z) \big)}? $
added 750 characters in body; edited tags
Jul
10
asked $ d(x,y)^2 \le d(x,z)^2 - d(y,z)^2\color{}{+\varphi\big(x,y,z,d(x,y),d(y,z) \big)}? $
Jul
8
revised On a topological proof of the infinitude of prime numbers.
added 9 characters in body
Jul
8
awarded  Popular Question
Jul
2
awarded  Curious
Jul
2
awarded  Inquisitive
Jun
30
reviewed Close What is the primitive of $\tan(x)\arctan(x)$?
Jun
30
reviewed Leave Closed math question im stumped on
Jun
30
reviewed Approve suggested edit on If $ x^2+y^2+z^2 =1$ for $x,y,z \in \mathbb{R}$, then find maximum value of $ x^3+y^3+z^3-3xyz $.
Jun
30
reviewed Approve suggested edit on Special kind of a linear Linear Diophantine equation
Jun
30
reviewed Leave Open Riemann Zeta function Analytic continuation integral
Jun
19
reviewed Approve suggested edit on relationship between complex numbers
Jun
19
reviewed Approve suggested edit on Curious set of $n\sin^2(n)$
Jun
19
reviewed Approve suggested edit on If X is a space in the order topology with lub. If A is closed, is A compact?
Jun
19
reviewed Reject suggested edit on Counting triplets with red edges in each pair