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If you have any good math exercises to share feel free to contribute them on http://exwiki.org


Apr
20
comment Determing sequence from its Dirichlet series
@Sasha Yes, I've checked these two pages before asking but somehow I am lacking the intuition to apply these ideas. Hence, do you mind elaborating a bit more please?
Apr
20
asked Determing sequence from its Dirichlet series
Apr
20
comment Odd Town Problem.
Check here for a proof with linear algebra exwiki.org/mw/index.php?title=The_Oddtown_theorem
Apr
15
asked Isomorphism of intervals of a distributive lattice
Apr
12
accepted Primality of the number of obtained by concatenating the n consecutive digits
Apr
10
revised Primality of the number of obtained by concatenating the n consecutive digits
edited body
Apr
10
asked Primality of the number of obtained by concatenating the n consecutive digits
Apr
6
accepted Relating the number of partitions with ordered blocks
Apr
3
accepted Obtaining a linear recurrence from differential equation
Apr
1
revised Relating the number of partitions with ordered blocks
edited body
Apr
1
asked Obtaining a linear recurrence from differential equation
Mar
31
comment Conjugacy classes of a subgroup of index 2.
Thank you for your explanation. Somehow I downvoted your question and I cannot upvote unless you make an edit to this post. Hence could you make a minor change so that I can correct the vote?
Mar
31
accepted Conjugacy classes of a subgroup of index 2.
Mar
30
comment Conjugacy classes of a subgroup of index 2.
Hm.. what exactly do you mean by "all orbits of H\cdot x$ under conjugation with $H$?
Mar
30
revised Relating the number of partitions with ordered blocks
edited title
Mar
30
asked Relating the number of partitions with ordered blocks
Mar
30
comment Conjugacy classes of a subgroup of index 2.
@GerryMyerson No I don't know that theorem. How can it be applied in this case?
Mar
29
asked Conjugacy classes of a subgroup of index 2.
Mar
24
answered How do I find the adjacency matrix for the nodes of an n-dimensional finite grid?
Mar
10
answered How can I prove that the Wiener index of the hypercube graph is $k \cdot 4^{k-1}$?