(2steps total)
PrintForm
Definitions
Lemmas
int
2
Sections
StandardLIB
Doc
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
neg
mul
arg
bounds
a
,
b
:
.
a
b
<0
a
<0 &
b
>0
a
>0 &
b
<0
By:
Analyze THEN Inst:
Thm*
a
,
b
:
.
a
b
>0
a
>0 &
b
>0
a
<0 &
b
<0 Using:[-
a
]
Generated subgoal:
1
1.
a
:
2.
b
:
. (-
a
)
b
>0
-
a
>0 &
b
>0
-
a
<0 &
b
<0
b
:
.
a
b
<0
a
<0 &
b
>0
a
>0 &
b
<0
1
step
About:
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
(2steps total)
PrintForm
Definitions
Lemmas
int
2
Sections
StandardLIB
Doc
a,b:
. a
b<0 
a<0 & b>0 
a>0 & b<0 a,b:. ab<0 a<0 & b>0 a>0 & b<0a,b:. ab>0 a>0 & b>0 a<0 & b<0 Using:[-a]
b:. (-a)b>0 -a>0 & b>0 -a<0 & b<0
b:. ab<0 a<0 & b>0 a>0 & b<0
