16,674 reputation
21866
bio website
location Mexico City
age
visits member for 2 years, 6 months
seen 17 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.


17h
revised Number of edges in a graph with n vertices and k connected components
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18h
revised Number of Terms in a Polynomial (4th Degree)
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22h
revised if $A$ and $B$ are subnormal, then $A\cap B$ is subnormal
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22h
revised Finite non-abelian group $G$ containing a subgroup $H_0\neq\{e\}$ with property that $H_0\leq H$ for all subgroups $H\neq\{e\}$
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1d
revised elementary topology exercises reference
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1d
revised $x^2-y^2=2s$, s cannot be an odd integer
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1d
revised Number of ways to arrange items
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1d
revised Number of ways to arrange items
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1d
revised Number of ways to arrange items
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1d
revised Number of ways to arrange items
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1d
revised How to solve this kind of problem?
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1d
revised Is it possible to permute an unknown binary sequence so that two particular bits are equal?
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2d
revised Is it possible to permute an unknown binary sequence so that two particular bits are equal?
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2d
revised Is it possible to permute an unknown binary sequence so that two particular bits are equal?
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2d
revised Relation Proofs on finite set
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2d
revised Infinite Set Proof (Countable and Uncountable )
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Dec
17
revised Automorphism that is an Involution of a finite group
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Dec
17
revised Factorial inequality $2!\,4!\,6!\cdots (2n)!\geq\left((n+1)!\right)^n$ using induction
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Dec
17
revised How many “good” graphs of size $n$ are there?
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Dec
17
revised How do I prove that for any set $A$, $|A| < |\mathbb{N}|$ implies that $A$ is finite?
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