Database
SUPPLEMENTARY MATERIAL (USERS' MATHBOXES)
Mathbox for Thierry Arnoux
Topology
Open cover refinement property
ccref
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df-cref
Metamath Proof Explorer
Ascii
Structured
Syntax definition
ccref
Description:
The "every open cover has an
A
refinement" predicate.
Ref
Expression
Assertion
ccref
class
CovHasRef
𝐴