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exponent
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AutomataTheory
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At:
auto2
lemma
6
1
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1.
n:
2.
0 < n
3.
T:
Type
4.
R:
T
Prop
5.
f:
n
T
6.
Bij(
n; T; f)
7.
t:T. Dec(R(t))
Surj(
(n-1); {t:T|
t = f(n-1) }; f)
By:
Unfold `surject` 0
Generated subgoal:
1
b:{t:T|
t = f(n-1) }.
a:
(n-1). f(a) = b
{t:T|
t = f(n-1) }
About:
b:{t:T| 
t = f(n-1) }. 
a:
(n-1). f(a) = b 
{t:T| t = f(n-1) }
PropnTn; T; f)t:T. Dec(R(t)) Surj((n-1); {t:T| t = f(n-1) }; f) b:{t:T| t = f(n-1) }. a:(n-1). f(a) = b {t:T| t = f(n-1) }
