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Helly property
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Mathematics
Area of mathematics
Geometry and topology
Geometric group theory
Group action on a tree
Created
2026-09-24
Updated
2026-09-24
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Finite families of convex subtrees of
a
tree
have the
Helly property
: if every
pair
intersects, then their total intersection is nonempty.
Ancestors
(6)
Group action on a tree
Geometric group theory
Geometry and topology
Area of mathematics
Mathematics
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Past exam of the mathematics course of the University of Cambridge
/
2026
/
iii
/
Paper 133
/
3
/
e
/
Solution
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