(14steps)
PrintForm
Definitions
Lemmas
int
2
Sections
StandardLIB
Doc
At:
decidable
ex
int
seg
1
1
1
2
2
1.
i:
2.
j:
3.
F:
{i..j
}
Prop
4.
k:{i..j
}. Dec(F(k))
5.
i
j
6.
n:
{...j-1}
7.
i
n
8.
(
k:{(n+1)..j
}. F(k))
Dec(
k:{n..j
}. F(k))
By:
InstHyp [n] 4
THEN
Analyze -1
Generated subgoals:
1
9.
F(n)
Dec(
k:{n..j
}. F(k))
2
9.
F(n)
Dec(
k:{n..j
}. F(k))
About:
(14steps)
PrintForm
Definitions
Lemmas
int
2
Sections
StandardLIB
Doc
Dec(
k:{n..j
}. F(k))
F(n) Dec(k:{n..j}. F(k))
}
Prop
k:{i..j}. Dec(F(k))
jn(k:{(n+1)..j}. F(k)) Dec(k:{n..j}. F(k)) Dec(k:{n..j}. F(k))F(n) Dec(k:{n..j}. F(k))
