Graph Theory triangle (3 colors)
131736
Proving a triangle with different edge colors exists in a graph.
7062
Can the complete graph $K_9$, be 2-coloured with no blue $K_4$ or red triangles?
472
In how many ways can $3$ red, $3$ blue, and $3$ green balls be arranged so that no two balls of the same colour are consecutive (up to symmetry)?
42513
Graph with Cycle and Two-Colorable
78464
Finding out the area of a triangle if the coordinates of the three vertices are given
62518
How many rectangles or triangles.
1000
$K_6$ contains at least two monochromatic $K_3$ graphs.
61340
Prove that there exists bipartite graph with this degree sequence: $(3,3,3,3,3,5,6,6,6,6,6,6,6,6)$
48692
A problem about the graph theory
78243
graph-theory problem about outdegree and indegree
24477
Monochromatic squares in a colored plane
90747
Upper bound on $\chi(G)$ for a triangle-free graph
90618
Color the edges of $K_6$ red or blue. Prove that there is a cycle of length 4 with monochromatic edges.
130751
Lower bound for monochromatic triangles in $K_n$
111733
Finding Vertices, Edges, Faces, and Tris using Python
129002
Number of triangles formed by $m$ lines
117992
Help with graph induction proof