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15
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Find the $\angle FPA$ in the figure below

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#geometry #euclidean-geometry #planar-graphs
117
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Planar graph with circuit bounding outer face of length $(n-5)/2$ is 4-colorable

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#discrete-mathematics #graph-theory #coloring #planar-graphs
85
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joining an even number of odd faces turns out to be an even face?

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#discrete-mathematics #graph-theory #planar-graphs
536
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Prove Herschel graph is nonhamiltonian

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#graph-theory #planar-graphs #bipartite-graphs #hamiltonian-path
1.6k
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Why is this proof for the four color theorem considered wrong?

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#graph-theory #solution-verification #coloring #planar-graphs
172
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Toroidal graphs have chromatic number at most $7$

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#graph-theory #planar-graphs
372
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Showing genus of a Petersen graph is equal to 1

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#general-topology #graph-theory #planar-graphs
140
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On a lemma for planar graphs

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#combinatorics #graph-theory #planar-graphs
143
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Can any planar graph be extended into a bipartite planar graph by a series of operations?

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#graph-theory #planar-graphs
134
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Reaching the grid graph from a planar graph using graph transformations

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#combinatorics #graph-theory #algorithms #planar-graphs
38
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Is there a name for the triangulation which minimizes the sum of the longest edge for each triangle?

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#graph-theory #terminology #computational-geometry #planar-graphs #triangulation
70
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4-cycle addition converts a quadrangulation graph with 2-connectivity into a 3-connected quadrangulation .

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#combinatorics #graph-theory #planar-graphs #graph-connectivity
34
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Graph that can be drawn to scale

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#discrete-mathematics #graph-theory #triangles #planar-graphs
66
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Recursively generate 3-regular planar graphs

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#graph-theory #recursion #planar-graphs
46
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Can vertex connectivity of a plane graph be characterized by a special closed Jordan curve?

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#graph-theory #planar-graphs #graph-connectivity

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