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visits member for 2 years, 7 months
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Jan
28
accepted Finding all continuous functions so that $f^n(x)=x$ for some $n$.
Jan
27
accepted Trigonometry book which develops geometric intuition.
Jan
22
accepted Every graph can be optimally colored greedily.
Jan
13
accepted Proof the Fibonacci numbers are not a polynomial.
Jan
12
accepted Quick way to check if a number is in a modular multiplicative cyclic group.
Jan
11
accepted Finding a non-piece wise function that gives us the $i$'th largest number.
Jan
11
accepted Are injections harder to find than surjections?
Jan
11
accepted Proof that $a^b>b^a$ if $a<b$ are integers larger or equal to two and $(a,b)\neq (2,3),(2,4)$
Jan
10
accepted Do all metric spaces satisfy this property (transitive action by isometries).
Jan
6
accepted Can we have $x^3 \equiv 1 \pmod n$?
Jan
6
accepted Pigeonholing mod 4 points on plane.
Jan
6
accepted Prove the number of total dominating sets of a bipartite graph is not exactly divisible by $2$
Jan
5
accepted Textbooks on permutation groups?
Jan
3
accepted When does $S_n$ have exactly one subgroup of index $2$?
Jan
2
accepted Does this result about sylow subgroups hold for infinite groups? (Rotman excercise)
Dec
23
accepted Coloring $\mathbb R^n$ with $n$ colors always gives us a color with all distances.
Dec
18
accepted Is it possible to permute an unknown binary sequence so that two particular bits are equal?
Dec
17
accepted Is this calculus proof I came up with sound?
Dec
17
accepted cardinality of $\mathbb R$ is the same as the cardinality of $\mathbb R^2$
Dec
2
accepted Constructing a cyclic quadrilateral of given sides.