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PiBaseLean
.
Properties
.
P31
.
Defs
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Imports
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PiBaseLean.AdditionalDefs.Cover
Imported by
PiBase
.
MetacompactSpace
source
class
PiBase
.
MetacompactSpace
(
X
:
Type
u)
[
TopologicalSpace
X
]
:
Prop
metacompact
(
α
:
Type
u)
(
s
:
α
→
Set
X
)
:
(∀ (
a
:
α
),
IsOpen
(
s
a
)
)
→
⋃ (
a
:
α
),
s
a
=
Set.univ
→
∃ (
β
:
Type
u) (
t
:
β
→
Set
X
),
(∀ (
b
:
β
),
IsOpen
(
t
b
)
)
∧
⋃ (
b
:
β
),
t
b
=
Set.univ
∧
PointFinite
t
∧
∀ (
b
:
β
),
∃ (
a
:
α
),
t
b
⊆
s
a
Instances