Sergey Norin

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Name	Sergey Norin
Member for	2 years
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Website	math.mcgill.ca/~snorin
Location	Montreal, CA
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Identifying poisoned wines

Is the empty graph a tree?

A graph with few edges everywhere

Can assignment solve stable marriage?

Induced Paths of Order 4

Erdős-Szekeres for first differences

4-coloring maps of pentagons

Open problems with monetary rewards

How to keep subsets disjoint?

A “rewiring process” on graphs

Maximal number of directed edges in suitable simple graphs on $n$ vertices without directed triangles.

Flow on Infinite Graphs

Red-blue alternating Menger’s theorem

Upper bounds on number of vertices of graphs whose complements has no induced cycles of certain lengths

union of regular polygons

Cauchy-Davenport strengthening?

Maximum number of edges $f(n,k)$ in a graph on $n$ vertices with no $k$-core?

Most inconsistent ranking

Stability of medians in Median graphs

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co.combinatorics× 14
graph-theory× 10
reference-request× 3
extremal-graph-theory× 3
topological-graph-theory
st.statistics
soft-question
puzzle
open-problems-list
open-problem

graph-colorings
gr.group-theory
extremal-set-theory
discrete-geometry
convention
combinatorial-game-theory
coding-theory
algorithms
additive-combinatorics

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