Related terms:
minimal counterexample
suffice
vertex of degree
could refer
scholars think
every planar
color theorem
five colors
planar graphs
weisstein
unavoidable
classical rabbinical literature
ephod
tarshish
discharging
graph coloring
triangulated
carnelian
four color theorem
greenish
malachite
classical era
number of vertices
fredrick
four color
haken
reducible
counterexample
carbuncle
Wikipedia sources:
Four color theorem
Hoshen
Context for words:
four
colours
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