13,991 reputation
21761
bio website
location Mexico City
age
visits member for 2 years, 5 months
seen 5 hours ago

Hello, I am a freshman at The National Autonomous University of Mexico (UNAM).

My interests are contest problems,elementary number theory, combinatorics, graph theory, linear algebra, group theory, abstract algebra and I have been meaning to learn category theory and matroids.


18h
asked Constructing a cyclic quadrilateral of given sides.
18h
answered Determine the number of distinct labeling of $K_{r,r}$
1d
answered Coloring edges of $K_n$ so each vertex has $l$ edges of each color.
Nov
24
asked Coloring edges of $K_n$ so each vertex has $l$ edges of each color.
Nov
24
asked For what values of $l$ is $K_n$ the disjoint union of $l$-regular graphs?
Nov
23
answered Number of 8 character passwords including numbers and letters without repetition
Nov
21
answered Prove that the board contains a nontrivial rectangle.
Nov
21
answered How to prove this statement: $\binom{r}{r}+\binom{r+1}{r}+\cdots+\binom{n}{r}=\binom{n+1}{r+1}$
Nov
20
answered Arrangements of $3n$ balls.
Nov
20
answered how many integers between one and 100000 have the sum equal to fifteen?
Nov
20
answered How many zeros does $f(x)= 3x^4 + x + 2 $ have?
Nov
20
answered Number of Bit Strings with Five Zeros
Nov
20
answered Coloring 3 by 3 square such that every unit square has an even number of squares it shares a vertex with of the same color (including itself).
Nov
20
answered Probability that this stamp is one that you haven't seen before
Nov
20
answered Combinatorics question about choosing non consecutive integers
Nov
20
answered Combinatorics question about choosing non consecutive integers
Nov
17
answered Strategies for solving permutations of a word
Nov
17
answered Relationships between altitudes and medians of a triangle
Nov
16
answered proof of a useful counting result in group theory
Nov
15
answered Prove two subgroups have the same order given an equivalence relation.