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Oleksandr Kulkov's user avatar
Oleksandr Kulkov's user avatar
Oleksandr Kulkov's user avatar
Oleksandr Kulkov
  • Member for 6 years, 5 months
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Just a silly competitive programmer.

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Top posts
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question
20
What are the properties of this polynomial sequence?
Nov 3, 2017
answer
11
Faster computation of p-adic log
May 21, 2022
question
9
Faster computation of p-adic log
May 21, 2022
question
6
Complexity of continued fraction arithmetic operations
Jul 26, 2023
answer
4
Types of generating functions (ordinary, exponential, ???) closed under substitution
Nov 27, 2023
question
4
Why is this mapping surjective?
Dec 1, 2017
answer
3
XOR circulant matrices?
Mar 23, 2023
question
3
Representing PSET as species
Jul 20, 2022
answer
3
Why are characters so well-behaved?
Mar 18, 2023
question
3
Efficient multiplication of Cayley-Dickson numbers
Nov 17, 2023
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5
How to show that $\sum_{k} (-1)^k{{a+b}\choose{a+k}}{{b+c}\choose{b+k}}{{c+a}\choose{c+k}} = \frac{(a+b+c)!}{a!b!c!}$
5
Proving $\sum_{i=0}^{n}\sum_{j=0}^{n}\binom{i+j}{i}\binom{n-i}{j}\binom{n-j}{i}\ =\ \sum_{k=0}^{n}\binom{2k}{k} $