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Number of connected graphs with $l+1$ vertices, $l$ edges with multiplicities $m_1,\dots,m_l$.

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#combinatorics #graph-theory
336
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intersection graph of tree $T$

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#graph-theory
220
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Another variant of cops and robber.

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#combinatorics #graph-theory #recreational-mathematics #puzzle
297
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Are hyperbolic tilings expander graphs

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#graph-theory #hyperbolic-geometry
991
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Lower bound on the size of the minimal vertex cover in a simple graph

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#graph-theory
191
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permutation graph $G$ and it's complement

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#graph-theory
181
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Isomorphism of circulant graphs

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#graph-theory #graph-isomorphism
808
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Is the Hamiltonian path problem NPC for all graphs?

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#graph-theory
593
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Complement of tree graph

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#graph-theory #trees #graph-connectivity
52
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Show that Graph is 5 or 4 colored

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#graph-theory #coloring
136
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Classification of these graphs?

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#graph-theory
42
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Does Covering Map of Graphs map trees to trees?

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#graph-theory #algebraic-topology
341
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Determinant of Laplacian removing $2$ (or more) rows and columns

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#linear-algebra #combinatorics #graph-theory #graph-laplacian
1.1k
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Handshake/pigeonhole principle problem?

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#combinatorics #graph-theory #combinatorial-designs
50
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Is there an name for a graph with this property?

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#graph-theory

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