Step of Proof: pos_mul_arg_bounds
12,41
postcript
pdf
Inference at
*
I
of proof for Lemma
pos
mul
arg
bounds
:
a
,
b
:
. ((
a
*
b
) > 0)
(((
a
> 0) & (
b
> 0))
((
a
< 0) & (
b
< 0)))
latex
by ((GenRepD)
CollapseTHENA ((Auto_aux (first_nat 1:n) ((first_nat 1:n),(first_nat 3:n
C
)) (first_tok :t) inil_term)))
latex
C
1
:
C1:
1.
a
:
C1:
2.
b
:
C1:
3. (
a
*
b
) > 0
C1:
((
a
> 0) & (
b
> 0))
((
a
< 0) & (
b
< 0))
C
2
:
C2:
1.
a
:
C2:
2.
b
:
C2:
3. ((
a
> 0) & (
b
> 0))
((
a
< 0) & (
b
< 0))
C2:
(
a
*
b
) > 0
C
.
Definitions
,
t
T
,
P
Q
,
P
Q
,
P
&
Q
,
P
Q
,
i
>
j
,
P
Q
,
x
:
A
.
B
(
x
)
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