What is the largest planar clique in n-dimensions?
37640
Minimum dimension to embed a graph with no crossings
70761
Number of ways to connect sets of $k$ dots in a perfect $n$-gon
102733
What is the largest number $n$ with $\lambda(n)=k$ for a given $k$?
38473
Checking whether a graph is planar
117020
Regular $n$-gon in the plane with vertices on integers?
85023
Permutation of n objects with restriction of adjacent pairs
18445
How to generalize symmetry for higher-dimensional arrays?
98991
How many different spanning trees of $K_n \setminus e$ are there?
97515
Is this graph a planar graph or not?
95876
Number of vertices in the Klein bottle triangulation given in "Topology and geometry for physicists" by Nash and Sen
89501
Equidecomposability of a Cube into 6 Trirectangular Tetrahedra
117685
Prove that a bipartite planar graph has a vertex of degree at most 3
106801
Labelled spanning trees of $K_n-e$
65622
Maximum edges in a square free graph
89164
When is the graph of the divisor relation on $[n]$ planar?
24477
Monochromatic squares in a colored plane
17868
How to calculate the number of possible connected simple graphs with $n$ labelled vertices