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SpherePacking
.
ForMathlib
.
ENat
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Imports
Init
Mathlib.Data.Set.Card
Mathlib.Topology.Instances.ENat
Mathlib.Topology.Algebra.InfiniteSum.Defs
Imported by
ENat
.
tsum_const_eq'
source
theorem
ENat
.
tsum_const_eq'
{
α
:
Type
u_1}
(
s
:
Set
α
)
(
c
:
ℕ∞
)
:
∑'
(
x
:
↑
s
)
,
c
=
s
.
encard
*
c