(7steps total)
PrintForm
Definitions
Lemmas
list
1
Sections
StandardLIB
Doc
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
select
firstn
T
:Type,
as
:
T
List,
n
:{0...||
as
||},
i
:
n
. firstn(
n
;
as
)[
i
] =
as
[
i
]
By:
(Assert (
T
:Type,
n
:
,
as
:
T
List.
n
||
as
||
(
i
:
n
. firstn(
n
;
as
)[
i
] =
as
[
i
])))
THEN
HypBackchain
Generated subgoal:
1
T
:Type,
n
:
,
as
:
T
List.
n
||
as
||
(
i
:
n
. firstn(
n
;
as
)[
i
] =
as
[
i
])
6
steps
About:
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
(7steps total)
PrintForm
Definitions
Lemmas
list
1
Sections
StandardLIB
Doc