azimut
  • Member for 8 years, 11 months
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11 answers
30 votes
8k views
31 bookmarks
Puzzles or short exercises illustrating mathematical problem solving to freshman students
2 answers
22 votes
3k views
12 bookmarks
Is a finitely generated projective module a direct summand of a *finitely generated* free module?
2 answers
21 votes
1k views
6 bookmarks
The smallest nontrivial conjugacy class in $S_n$
1 answers
18 votes
568 views
3 bookmarks
Combinatorics in finite vector space
2 answers
9 votes
3k views
4 bookmarks
Is any subgroup of a direct product isomorphic to a direct product of subgroups?
3 answers
8 votes
307 views
2 bookmarks
Wanted: Insight into formula involving binomial coefficients
1 answers
7 votes
421 views
2 bookmarks
Show from the axioms: Addition in a quasifield is abelian
0 answers
6 votes
474 views
4 bookmarks
Wanted: Group homomorphism $\operatorname{Aut}(G) \to H$ whose kernel is the set of inner automorphisms
1 answers
6 votes
1k views
2 bookmarks
Equality case in the Frobenius rank inequality
1 answers
6 votes
305 views
Images of composed homomorphisms
1 answers
6 votes
414 views
1 bookmarks
Relationship between divisibility of polynomials and divisibility of its evaluations
2 answers
5 votes
998 views
2 bookmarks
Any two Singer cyclic subgroups of GL(n,q) are conjugate
1 answers
5 votes
373 views
In a lattice, does $x \vee y \leq x\vee z$ and $x \wedge y \leq x\wedge z$ imply $y\leq z$?
0 answers
4 votes
245 views
When are Hamming codes cyclic?
1 answers
4 votes
152 views
Conjugacy of Singer cyclic groups in $\mathrm{P\Gamma L}$
1 answers
4 votes
129 views
1 bookmarks
Irreducibility of $X(X-3)(X-\alpha)(X-\beta) + 1$
6 answers
4 votes
3k views
4 bookmarks
Show that $\sqrt[3]{3\sqrt{21} + 8} - \sqrt[3]{3\sqrt{21} - 8} = 1$
2 answers
4 votes
241 views
2 bookmarks
Period of a set of primes
1 answers
3 votes
132 views
1 bookmarks
Degree of a multivariate polynomial over a finite field with many roots
1 answers
3 votes
713 views
Showing that a ring homomorphism is injective
2 answers
2 votes
44 views
Intuition to move-optimality in Sokoban
2 answers
2 votes
126 views
Minimum weight of ternary Golay code in cyclic form
1 answers
2 votes
2k views
1 bookmarks
Subgroups and quotient groups of finite abelian $p$-groups
0 answers
2 votes
81 views
1 bookmarks
Maximality of the kernel of a quasifield
1 answers
2 votes
665 views
Galois group of an irreducible cubic polynomial without using the discriminant
2 answers
2 votes
1k views
2 bookmarks
Isomorphism types of semidirect products $\mathbb Z/n\mathbb Z\rtimes\mathbb Z/2\mathbb Z$
1 answers
1 votes
61 views
Monic irreducible reversible polynomial
1 answers
0 votes
467 views
Proof for ring isomorphism