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visits member for 2 years, 7 months
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Aug
8
revised How many $4$ digit even numbers have all $4$ digits distinct?
added 1 character in body
Apr
11
revised Minimum number of combinations
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Apr
9
revised Is my second equation right?
Use Mathjax
Apr
9
revised Convert from base 10 to base 5
improved formatting
Apr
8
revised Convert from base 10 to base 5
added 142 characters in body
Oct
23
revised How to change to same units
edited tags
Oct
15
revised Prove that $6$ divides $n(n + 1)(n + 2)$
edited tags
Oct
14
revised Determine convergence $\sum_{n=1}^\infty\left(\frac{2 n + 2}{2 n + 3}\right)^{n^2}$
deleted 1 characters in body; edited title
Oct
13
revised Coupon selecting problem
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Oct
7
revised Can you help me with a limit?
Format, grammar and retagged
Oct
6
revised How can we directly see that the number of random walks starting and ending at the origin is ${n\choose n/2}^2$?
added 220 characters in body
Sep
21
revised 10 children divide into 2 teams each. How many divisions possible?
added 319 characters in body
Sep
21
revised 10 children divide into 2 teams each. How many divisions possible?
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Sep
20
revised Can you please help me understand a part of this proof?
rolled back to a previous revision
Sep
20
revised Let $S$ be a subset of $\Bbb R$ of finite Lebesgue measure.
rolled back to a previous revision
Sep
20
revised How can I explain this formally?
rolled back to a previous revision
Sep
20
revised Any hint for this measure theory problem?
rolled back to a previous revision
Sep
19
revised Symmetry functions and integration
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Sep
18
revised Does this hold: $\sum_{n=1}^\infty \sum_{k=1}^n 2^{-n}=\sum_{k=1}^\infty \sum_{n=k}^\infty 2^{-n}$?
added 46 characters in body
Sep
14
revised Can some clearly explain about lim sup and lim inf?
added 468 characters in body