Documentation
LeanAPAP
.
Mathlib
.
Data
.
Nat
.
Factorial
.
DoubleFactorial
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LeanAPAP
.
Mathlib
.
Data
.
Nat
.
Factorial
.
DoubleFactorial
source
Imports
Init
Mathlib.Data.Nat.Factorial.DoubleFactorial
Imported by
Nat
.
doubleFactorial_pos
Nat
.
doubleFactorial_le_factorial
source
theorem
Nat
.
doubleFactorial_pos
{n :
ℕ
}
:
0
<
Nat.doubleFactorial
n
source
theorem
Nat
.
doubleFactorial_le_factorial
{n :
ℕ
}
:
Nat.doubleFactorial
n
≤
Nat.factorial
n