(5steps total)
PrintForm
Definitions
hol
Sections
HOLlib
Doc
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
choose
unique
1
1.
'a
: Type
2.
P
:
'a
Type
3.
x
:
'a
4.
P
(
x
)
5.
y
:
'a
.
P
(
y
)
x
=
y
InjCase(lem({
y
:
'a
|
P
(
y
) });
y
.
y
, arb(
'a
)) =
x
By:
GenDC (lem({
y
:
'a
|
P
(
y
) })) THEN StrongAuto
Generated subgoals:
1
6.
x2
: {
y
:
'a
|
P
(
y
) }
x2
=
x
1
step
2
6. {
y
:
'a
|
P
(
y
) }
Void
arb(
'a
) =
x
2
steps
About:
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
(5steps total)
PrintForm
Definitions
hol
Sections
HOLlib
Doc
Type
y:'a. P(y) 
x = y
InjCase(lem({y:'a| P(y) }); y. y, arb('a)) = x
