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First year graduate student at Yale.


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awarded  Yearling
Sep
24
awarded  Autobiographer
Sep
8
awarded  Popular Question
Jul
2
answered How can I prove that $2^{n+2}\mid(2n+3)!$?
Jul
2
awarded  Curious
Jul
2
awarded  Inquisitive
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14
awarded  Nice Question
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awarded  Popular Question
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16
awarded  Benefactor
Apr
16
accepted Showing the set $A+B$ is closed.
Apr
16
comment Showing the set $A+B$ is closed.
ok thanks! that was really cool. I didnt know much about embeddings.
Apr
15
comment Combinatoric Graph
Yes, although you are missing $\{a,b,c\}$. Then for each one draw a point and which do you connect to which?
Apr
15
comment Combinatoric Graph
First step: What are the subsets of $\{a,b,c\}$?
Apr
15
answered Isomorphisms between finite abelian groups and cyclic groups
Apr
10
asked Showing the set $A+B$ is closed.
Apr
9
answered a group of order $9$ is abelian
Apr
6
answered Combinatorial proofs - how?
Apr
6
answered $f > 0$ implies integral of $f$ is greater than $0$
Apr
6
comment $f > 0$ implies integral of $f$ is greater than $0$
No, the problems that you have here is that taking the infimum of a set of positive numbers can yield zero. For instance $\inf\{\frac{1}{n}\mid n\in\mathbb{N}\}$.
Apr
6
answered Combining Random Variables to get the Variance