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Oct
16
comment Is a rigid cycle a chordal graph?
What does G2(n) mean?
Oct
15
comment Integral representation of the function
Also posted to m.se, math.stackexchange.com/questions/974844/integral-representation
Oct
15
revised Integral representation of the function
typos
Oct
14
awarded  Enlightened
Oct
14
awarded  Nice Answer
Oct
14
answered Books on advanced galois theory
Oct
14
answered What did Rolle prove when he proved Rolle's theorem?
Oct
13
comment homomorphisms of abelian groups
Good question, wrong website --- we do research at MO.
Oct
12
comment solutions to special diophantine equations
But you are looking at $x^2+y^2+z^2=u^2+v^2+w^2$, $x+y+z=u+v+w$, which is not what OP asks about. The $z$ and $v$ should swap places in the 2nd equation.
Oct
12
comment solutions to special diophantine equations
You have $z$ on both sides of both equations in your update, Alexey.
Oct
12
comment Schoenberg's Rational Polygon Problem
Open even for 8, I think. 7 is the most anyone has found (I think). But Joseph knows that from earlier questions.
Oct
12
comment solutions to special diophantine equations
@Alexey, the question's not quite about multigrades --- notice that $z$ and $v$ switch sides between the two equations.
Oct
11
answered solutions to special diophantine equations
Oct
11
comment solutions to special diophantine equations
10, 4, 1; 8, 2, 7.
Oct
11
comment solutions to special diophantine equations
3, 3, 4; 5, 3, 0.
Oct
11
revised About the maximum degree of multivariate polynomial interpolation
typo in title
Oct
11
awarded  Nice Answer
Oct
10
comment Zero's in the decimal representation of powers of 3
See also oeis.org/A238938 (powers of 2 without a zero in the decimal expansion).
Oct
10
comment Algebraic topology, Dynamical systems
"This statement is in a paper." Cite?
Oct
9
comment Conjecture on prime numbers
You could just take $a=d-1$.