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Mathematics
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xojfqa
  • Member for 2 years, 7 months
  • Last seen more than 1 year ago
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2
Error in my derivation of $\binom{2n-1}{n}$ as number of partitions of $n$
Dec 26, 2021
2
Closed form expressions for $\sum_{k=0}^n {n\choose k}b^{k}$ and $\sum_{k=0}^n {n\choose k}b^{n-k}$?
Jul 28, 2022
2
Sort $5$ labeled balls into $3$ labeled bins such that no bin is empty
Jul 29, 2022
2
Interpretation of multinomial coefficients in terms of choosing elements from a set?
Aug 6, 2022
1
Deriving recursion formula for the moments about the mean of the Poisson distribution
Jul 2, 2022
1
Proving $\sum^n_{k=0} k^2 {n\choose k} = (n+n^2)2^{n-2}$
Aug 6, 2022
1
Methods of deriving $\sum^n_{x=0} xr^{x-1}$
Aug 31, 2022
1
Prove $\sum_{x=1}^\infty xr^x = {r\over r-1}$ by taking the limit of the partial sum formula
Oct 3, 2022
0
When is the gradient orthogonal to a surface?
Jul 17, 2022
0
Multinomial coefficient or stars and bars for $k$ sided dice rolls?
Aug 4, 2022
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6
What are the best ML models for hundreds of binary features (but a non-binary response variable)?
5
Why can't language models, like GPT-3, continuously learn once trained?