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Johann Cigler's user avatar
Johann Cigler's user avatar
Johann Cigler's user avatar
Johann Cigler
  • Member for 13 years, 5 months
  • Last seen this week
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5,450
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223k
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37
answers
67
questions
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57
Score
59
Posts
57
Posts %
35
Score
18
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17
Posts %
22
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11
Posts
11
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17
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18
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17
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12
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15
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10
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12
Posts
12
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Top posts
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All Questions Answers
Score Newest
question
40
Curious $q$-analogues
Jul 21, 2010
question
27
Some binomial coefficient determinants
Mar 24, 2018
question
22
A q-rious identity
Sep 17, 2019
question
20
Are the q-Catalan numbers q-holonomic?
May 4, 2010
answer
14
Why worry about the axiom of choice?
Apr 29, 2010
question
13
Recurrent sequences and Bernoulli-like numbers
Dec 6, 2010
question
13
Is there a $q$-L'Hospital's Rule?
Aug 3, 2015
question
13
Some $q-$analogues of $ \sum\limits_{j = - k}^k {{{( - 1)}^{ j}}}\binom{n}{k-j}\binom{n}{k+j}=\binom{n}{k}.$
Apr 23, 2015
question
12
A matrix identity related to Catalan numbers
Aug 15, 2018
question
12
Lucky chance or combinatorial cause?
May 10, 2012
Top network posts
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9
Proof of a Binomial identity
7
Lucky chance or combinatorial cause?
7
Prove $(1-x)^{2k+1} \sum\limits_{n\ge 0}\binom{n+k-1}{k}\binom{n+k}{k} x^n = {\sum\limits_{j\ge 0} \binom{k-1}{j-1}\binom{k+1}{j} x^j} $
5
An identity for $q-$Fibonacci numbers if $q$ is a root of unity.
5
A curious Hankel determinant

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