<em id="zlul0"></em>

<dl id="zlul0"></dl>
<div id="zlul0"><tr id="zlul0"><object id="zlul0"></object></tr></div>
<em id="zlul0"></em>

<div id="zlul0"><ol id="zlul0"></ol></div>

Questions tagged [co.combinatorics]

Enumerative combinatorics, graph theory, order theory, posets, matroids, designs and other discrete structures. It also includes algebraic, analytic and probabilistic combinatorics.

6,793 questions
Filter by
Sorted by
Tagged with
21 views

The number of hamiltonian circuits on a convex polytope embedded in $\mathbb{R}^N$

Recently I wondered whether there might be a natural topological complexity measure for convex polytopes embedded in $\mathbb{R}^N$. After some reflection it occurred to me that the number of distinct ...
130 views

34 views

A weakened form of list coloring

The list coloring of a simple loopless graph is the assigning of a color from a certain list of colors to every vertex. The list coloring chromatic number of a graph is the minimal cardinality of the ...
182 views

Polynomial defined recursively by a resultant

Cross posting from MSE. Definition: For any natural number $n\ge 3$, define the polynomial $P_{n}\left(x_1,x_2,...,x_{n-1},x_{n} \right)$, with indeterminates $x_{i}$, where $i\in\{1,2,...,n-1,n\}$, ...
10 views

If I have 3 different tee pads for a 9 hole golf course how may different combinations are there and how do you calculate it in equation form [migrated]

If I have 3 different tee pads for a 9 hole golf course how may different combinations are there and how do you calculate it in equation form.
54 views

Large subsets of the Hamming cube with small intersections with all spheres of given radius

What is the maximal cardinality of a subset $A$ of $\{-1,1\}^n$ such that any Hamming sphere with radius $r$ contains at most $k$ elements of $A$? Are explicit constructions with large cardinality ...
40 views

Number of maximal independent sets in a simple graph

Consider a simple regular graph on $n$ vertices and size $E$. How many distinct maximal independents can we find at the least in the graph? I think we can always find at least two maximal ...

15 30 50 per page
山西福彩快乐十分钟

<em id="zlul0"></em>

<dl id="zlul0"></dl>
<div id="zlul0"><tr id="zlul0"><object id="zlul0"></object></tr></div>
<em id="zlul0"></em>

<div id="zlul0"><ol id="zlul0"></ol></div>