Reputation
Next tag badge:
94/100 score
25/20 answers
Badges
10 139 278
Impact
~1.4m people reached

May
19
comment A functional equation with no term outside functions
For the functional equation to hold for all $m,n$, it is necessary that $m-n+f(n)\in\mathbb N$ for all $m,n$, hence $f(n)\ge n$.
May
19
revised Number of solutions of $x^2 + y^2 + z^2 = 0$ over finite fields.
deleted 91 characters in body
May
18
answered Tetrahedra from it's inscribed sphere
May
18
comment Integral giving wrong values
$1-\frac14=\frac34\ne -1\frac14$
May
18
answered question about isomorphism involving Dihedral group.
May
18
comment Group acting on its set of subgroups by conjugation
If aou have problems with the stabilizer, maybe first determine the orbit (so that you know how large the stabilizer should be)
May
18
revised existence of $\lambda$ in $V^*$ in an $n$ dimensional vector space
deleted 28 characters in body
May
18
answered existence of $\lambda$ in $V^*$ in an $n$ dimensional vector space
May
18
answered A 3rd grade math problem: fill in blanks with numbers to obtain a valid equation
May
18
answered Show that $f$ is onto .
May
18
answered Number of solutions of $x^2 + y^2 + z^2 = 0$ over finite fields.
May
18
revised A set is not semialgebraic
added 666 characters in body
May
18
answered A set is not semialgebraic
May
18
comment Gram-Schmidt in characteristic two?
To simply extract a basis from a set of generators, Gauß elimination into row echelon form should suffice.
May
18
answered Special method of solution for $A\vec x=\vec b$ where $A$ is a square matrix such that $A^tA$ is diagonal and has full rank?
May
18
answered Topological field - Proving continuity of inversion
May
17
awarded  Nice Answer
May
17
revised What are the possible sets of critical values of a complex polynomial of degree $n$?
added 50 characters in body
May
17
answered What are the possible sets of critical values of a complex polynomial of degree $n$?
May
17
comment The probability to win in a promotional quiz
What have you tried? Are you aware that the chance of there being exactly one winner is $n\cdot p\cdot(1-p)^{n-1}$?