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Martin Rubey

http://www.dmg.tuwien.ac.at/rubey

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Top Questions
16 votes

Proving that a poset is a lattice

lattices order-theory posets co.combinatorics ra.rings-and-algebras asked Sep 28, 2010 at 17:19
mathoverflow.net

14 votes

actions of the hyperoctahedral group

reference-request co.combinatorics rt.representation-theory group-actions coxeter-groups asked Sep 17, 2015 at 9:34
mathoverflow.net

13 votes

$\mathfrak{sl}_3$ webs without faces having a multiple of 4 sides

co.combinatorics rt.representation-theory asked May 29, 2020 at 9:16
mathoverflow.net

12 votes

Lattices on classical combinatorial families

reference-request co.combinatorics big-list order-theory lattice-theory asked Jun 20, 2020 at 9:24
mathoverflow.net

11 votes

leaf-labelled unordered, rooted binary trees and perfect matchings

combinatorics recreational-mathematics alternative-proof asked Nov 9, 2017 at 7:25
math.stackexchange.com

10 votes

is there a ‘nice’ lattice on the set of unlabelled graphs with $n$ vertices?

reference-request co.combinatorics graph-theory order-theory lattice-theory asked Jun 18, 2020 at 23:21
mathoverflow.net

10 votes

Has there been any application of tensor species?

co.combinatorics reference-request rt.representation-theory examples asked May 4, 2012 at 8:38
mathoverflow.net

10 votes

types of generating functions (ordinary, exponential, ???) closed under substitution

reference-request co.combinatorics generating-functions asked Jul 14, 2015 at 14:57
mathoverflow.net

9 votes

Products of Catalan numbers

nt.number-theory reference-request co.combinatorics catalan-numbers asked Dec 5, 2018 at 12:28
mathoverflow.net

8 votes

How to obtain the bibtex item for a question with a program or HTTP request?

support app-request script-request asked May 17, 2015 at 8:54
stackapps.com

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Top Answers
27
Is there any use for $\sin(\sin x)$?
mathoverflow.net

21
Exact formulas for the partition function?
mathoverflow.net

16
Nontrivial theorems with trivial proofs
mathoverflow.net

12
Generalization's of Greene's Theorem for the Robinson-Schensted correspondence
mathoverflow.net

11
Whether a total order set of size $n$ has the fewest endomorphisms among posets of size $n$
mathoverflow.net

9
What is the relationship between the Bell numbers, the Bell polynomials, and the partition numbers?
mathoverflow.net

9
Number of spanning trees in a grid
mathoverflow.net

9
What are some examples of interesting uses of the theory of combinatorial species?
mathoverflow.net

9
Examples of advance via good definitions
mathoverflow.net

9
What is an explicit bijection in combinatorics?
mathoverflow.net

9
Is there a combinatorial interpretation of this array in terms of $S_{2n+1}$?
mathoverflow.net

8
Divisibility Relation for Spanning Trees of a Graph
mathoverflow.net

8
How many permutations are there at a given Cayley distance from the identity?
mathoverflow.net

8
Is there a website or a survey collecting all NP-complete problems on graph theory?
mathoverflow.net

7
Is there a bijection of permutations onto mathematical objects that preserve information about descents?
mathoverflow.net

7
Label distance number and chromatic number of a graph
mathoverflow.net

6
Is there a natural family of languages whose generating functions are holonomic (i.e. D-finite)?
mathoverflow.net

6
Two statistics on the permutation group
mathoverflow.net

6
Bijective proof of formula for rooted binary forests
mathoverflow.net

5
Finding recurrence relation for a sequence of polynomials
mathoverflow.net

5
The sum of an hydrogen atom related infinite series
mathoverflow.net

5
Hankel determinants for q-Catalan numbers where q is a root of unity?
mathoverflow.net

5
Connectivity graph invariant
mathoverflow.net