gurghet
  • Member for 10 years, 7 months
  • Last seen more than a month ago
3 answers
4 votes
725 views
1 bookmarks
How to prove that if $a\equiv b \pmod{kn}$ then $a^k\equiv b^k \pmod{k^2n}$
2 answers
4 votes
374 views
3 bookmarks
Non-natural transformation example
1 answers
4 votes
177 views
1 bookmarks
In a category, does the composition morphism need to exist?
1 answers
4 votes
8k views
Completing the squares for matrices
2 answers
3 votes
134 views
How to express the special property of a partial order?
3 answers
3 votes
125 views
What is the smallest number which begins with 7 and if you bring the 7 to the least significant position it becomes a third of the original number?
2 answers
2 votes
82 views
A free category on the graph of flights. What idea is captured?
1 answers
2 votes
309 views
How to go from Fermat’s little theorem to Euler’s theorem thought Ivory’s demonstration?
1 answers
2 votes
2k views
1 bookmarks
Completion of the squares (actually of the quadratic forms)
1 answers
1 votes
51 views
When drawing a category, is it reasonable to imply composition?
2 answers
1 votes
119 views
Existence of limits of set-valued functors gives me weird limits
3 answers
1 votes
183 views
1 bookmarks
What is the “on morphism” part of a free functor?
1 answers
1 votes
48 views
How to say that for any $x$ you have $\operatorname{id}_x : x \to x$?
0 answers
1 votes
120 views
Proof that isomorphisms are unique in any category
1 answers
1 votes
82 views
1 bookmarks
Simplify non-linear but simple expression with max and min