Users' Mathboxes Mathbox for Jim Kingdon < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >   Mathboxes  >  trirec0 Unicode version

Theorem trirec0 14076
Description: Every real number having a reciprocal or equaling zero is equivalent to real number trichotomy.

This is the key part of the definition of what is known as a discrete field, so "the real numbers are a discrete field" can be taken as an equivalent way to state real trichotomy (see further discussion at trilpo 14075). (Contributed by Jim Kingdon, 10-Jun-2024.)

Assertion
Ref Expression
trirec0  |-  ( A. x  e.  RR  A. y  e.  RR  ( x  < 
y  \/  x  =  y  \/  y  < 
x )  <->  A. x  e.  RR  ( E. z  e.  RR  ( x  x.  z )  =  1  \/  x  =  0 ) )
Distinct variable group:    x, y, z

Proof of Theorem trirec0
Dummy variable  w is distinct from all other variables.
StepHypRef Expression
1 simpll 524 . . . . . 6  |-  ( ( ( x  e.  RR  /\ 
A. y  e.  RR  ( x  <  y  \/  x  =  y  \/  y  <  x ) )  /\  x  <  0 )  ->  x  e.  RR )
2 simpr 109 . . . . . . 7  |-  ( ( ( x  e.  RR  /\ 
A. y  e.  RR  ( x  <  y  \/  x  =  y  \/  y  <  x ) )  /\  x  <  0 )  ->  x  <  0 )
31, 2lt0ap0d 8568 . . . . . 6  |-  ( ( ( x  e.  RR  /\ 
A. y  e.  RR  ( x  <  y  \/  x  =  y  \/  y  <  x ) )  /\  x  <  0 )  ->  x #  0 )
4 rerecclap 8647 . . . . . . 7  |-  ( ( x  e.  RR  /\  x #  0 )  ->  (
1  /  x )  e.  RR )
5 recn 7907 . . . . . . . 8  |-  ( x  e.  RR  ->  x  e.  CC )
6 recidap 8603 . . . . . . . 8  |-  ( ( x  e.  CC  /\  x #  0 )  ->  (
x  x.  ( 1  /  x ) )  =  1 )
75, 6sylan 281 . . . . . . 7  |-  ( ( x  e.  RR  /\  x #  0 )  ->  (
x  x.  ( 1  /  x ) )  =  1 )
8 oveq2 5861 . . . . . . . . 9  |-  ( z  =  ( 1  /  x )  ->  (
x  x.  z )  =  ( x  x.  ( 1  /  x
) ) )
98eqeq1d 2179 . . . . . . . 8  |-  ( z  =  ( 1  /  x )  ->  (
( x  x.  z
)  =  1  <->  (
x  x.  ( 1  /  x ) )  =  1 ) )
109rspcev 2834 . . . . . . 7  |-  ( ( ( 1  /  x
)  e.  RR  /\  ( x  x.  (
1  /  x ) )  =  1 )  ->  E. z  e.  RR  ( x  x.  z
)  =  1 )
114, 7, 10syl2anc 409 . . . . . 6  |-  ( ( x  e.  RR  /\  x #  0 )  ->  E. z  e.  RR  ( x  x.  z )  =  1 )
121, 3, 11syl2anc 409 . . . . 5  |-  ( ( ( x  e.  RR  /\ 
A. y  e.  RR  ( x  <  y  \/  x  =  y  \/  y  <  x ) )  /\  x  <  0 )  ->  E. z  e.  RR  ( x  x.  z )  =  1 )
1312orcd 728 . . . 4  |-  ( ( ( x  e.  RR  /\ 
A. y  e.  RR  ( x  <  y  \/  x  =  y  \/  y  <  x ) )  /\  x  <  0 )  ->  ( E. z  e.  RR  ( x  x.  z
)  =  1  \/  x  =  0 ) )
14 simpr 109 . . . . 5  |-  ( ( ( x  e.  RR  /\ 
A. y  e.  RR  ( x  <  y  \/  x  =  y  \/  y  <  x ) )  /\  x  =  0 )  ->  x  =  0 )
1514olcd 729 . . . 4  |-  ( ( ( x  e.  RR  /\ 
A. y  e.  RR  ( x  <  y  \/  x  =  y  \/  y  <  x ) )  /\  x  =  0 )  ->  ( E. z  e.  RR  ( x  x.  z
)  =  1  \/  x  =  0 ) )
16 simpll 524 . . . . . 6  |-  ( ( ( x  e.  RR  /\ 
A. y  e.  RR  ( x  <  y  \/  x  =  y  \/  y  <  x ) )  /\  0  < 
x )  ->  x  e.  RR )
17 simpr 109 . . . . . . 7  |-  ( ( ( x  e.  RR  /\ 
A. y  e.  RR  ( x  <  y  \/  x  =  y  \/  y  <  x ) )  /\  0  < 
x )  ->  0  <  x )
1816, 17gt0ap0d 8548 . . . . . 6  |-  ( ( ( x  e.  RR  /\ 
A. y  e.  RR  ( x  <  y  \/  x  =  y  \/  y  <  x ) )  /\  0  < 
x )  ->  x #  0 )
1916, 18, 11syl2anc 409 . . . . 5  |-  ( ( ( x  e.  RR  /\ 
A. y  e.  RR  ( x  <  y  \/  x  =  y  \/  y  <  x ) )  /\  0  < 
x )  ->  E. z  e.  RR  ( x  x.  z )  =  1 )
2019orcd 728 . . . 4  |-  ( ( ( x  e.  RR  /\ 
A. y  e.  RR  ( x  <  y  \/  x  =  y  \/  y  <  x ) )  /\  0  < 
x )  ->  ( E. z  e.  RR  ( x  x.  z
)  =  1  \/  x  =  0 ) )
21 0re 7920 . . . . . 6  |-  0  e.  RR
22 breq2 3993 . . . . . . . 8  |-  ( y  =  0  ->  (
x  <  y  <->  x  <  0 ) )
23 eqeq2 2180 . . . . . . . 8  |-  ( y  =  0  ->  (
x  =  y  <->  x  = 
0 ) )
24 breq1 3992 . . . . . . . 8  |-  ( y  =  0  ->  (
y  <  x  <->  0  <  x ) )
2522, 23, 243orbi123d 1306 . . . . . . 7  |-  ( y  =  0  ->  (
( x  <  y  \/  x  =  y  \/  y  <  x )  <-> 
( x  <  0  \/  x  =  0  \/  0  <  x ) ) )
2625rspcv 2830 . . . . . 6  |-  ( 0  e.  RR  ->  ( A. y  e.  RR  ( x  <  y  \/  x  =  y  \/  y  <  x )  ->  ( x  <  0  \/  x  =  0  \/  0  < 
x ) ) )
2721, 26ax-mp 5 . . . . 5  |-  ( A. y  e.  RR  (
x  <  y  \/  x  =  y  \/  y  <  x )  -> 
( x  <  0  \/  x  =  0  \/  0  <  x ) )
2827adantl 275 . . . 4  |-  ( ( x  e.  RR  /\  A. y  e.  RR  (
x  <  y  \/  x  =  y  \/  y  <  x ) )  ->  ( x  <  0  \/  x  =  0  \/  0  < 
x ) )
2913, 15, 20, 28mpjao3dan 1302 . . 3  |-  ( ( x  e.  RR  /\  A. y  e.  RR  (
x  <  y  \/  x  =  y  \/  y  <  x ) )  ->  ( E. z  e.  RR  ( x  x.  z )  =  1  \/  x  =  0 ) )
3029ralimiaa 2532 . 2  |-  ( A. x  e.  RR  A. y  e.  RR  ( x  < 
y  \/  x  =  y  \/  y  < 
x )  ->  A. x  e.  RR  ( E. z  e.  RR  ( x  x.  z )  =  1  \/  x  =  0 ) )
31 oveq1 5860 . . . . . . 7  |-  ( x  =  w  ->  (
x  x.  z )  =  ( w  x.  z ) )
3231eqeq1d 2179 . . . . . 6  |-  ( x  =  w  ->  (
( x  x.  z
)  =  1  <->  (
w  x.  z )  =  1 ) )
3332rexbidv 2471 . . . . 5  |-  ( x  =  w  ->  ( E. z  e.  RR  ( x  x.  z
)  =  1  <->  E. z  e.  RR  (
w  x.  z )  =  1 ) )
34 eqeq1 2177 . . . . 5  |-  ( x  =  w  ->  (
x  =  0  <->  w  =  0 ) )
3533, 34orbi12d 788 . . . 4  |-  ( x  =  w  ->  (
( E. z  e.  RR  ( x  x.  z )  =  1  \/  x  =  0 )  <->  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 ) ) )
3635cbvralv 2696 . . 3  |-  ( A. x  e.  RR  ( E. z  e.  RR  ( x  x.  z
)  =  1  \/  x  =  0 )  <->  A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 ) )
37 nfcv 2312 . . . . . . . . 9  |-  F/_ z RR
38 nfre1 2513 . . . . . . . . . 10  |-  F/ z E. z  e.  RR  ( w  x.  z
)  =  1
39 nfv 1521 . . . . . . . . . 10  |-  F/ z  w  =  0
4038, 39nfor 1567 . . . . . . . . 9  |-  F/ z ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )
4137, 40nfralya 2510 . . . . . . . 8  |-  F/ z A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )
42 nfv 1521 . . . . . . . 8  |-  F/ z ( x  e.  RR  /\  y  e.  RR )
4341, 42nfan 1558 . . . . . . 7  |-  F/ z ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )
44 nfv 1521 . . . . . . 7  |-  F/ z ( x  <  y  \/  x  =  y  \/  y  <  x )
45 simpr 109 . . . . . . . . . . 11  |-  ( ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  /\  ( y  -  x )  <  0
)  ->  ( y  -  x )  <  0
)
46 simprr 527 . . . . . . . . . . . . . 14  |-  ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  -> 
y  e.  RR )
4746ad2antrr 485 . . . . . . . . . . . . 13  |-  ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  ->  y  e.  RR )
4847adantr 274 . . . . . . . . . . . 12  |-  ( ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  /\  ( y  -  x )  <  0
)  ->  y  e.  RR )
49 simprl 526 . . . . . . . . . . . . . 14  |-  ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  ->  x  e.  RR )
5049ad2antrr 485 . . . . . . . . . . . . 13  |-  ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  ->  x  e.  RR )
5150adantr 274 . . . . . . . . . . . 12  |-  ( ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  /\  ( y  -  x )  <  0
)  ->  x  e.  RR )
5248, 51sublt0d 8489 . . . . . . . . . . 11  |-  ( ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  /\  ( y  -  x )  <  0
)  ->  ( (
y  -  x )  <  0  <->  y  <  x ) )
5345, 52mpbid 146 . . . . . . . . . 10  |-  ( ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  /\  ( y  -  x )  <  0
)  ->  y  <  x )
54533mix3d 1169 . . . . . . . . 9  |-  ( ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  /\  ( y  -  x )  <  0
)  ->  ( x  <  y  \/  x  =  y  \/  y  < 
x ) )
55 simpr 109 . . . . . . . . . . 11  |-  ( ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  /\  0  <  (
y  -  x ) )  ->  0  <  ( y  -  x ) )
5650adantr 274 . . . . . . . . . . . 12  |-  ( ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  /\  0  <  (
y  -  x ) )  ->  x  e.  RR )
5747adantr 274 . . . . . . . . . . . 12  |-  ( ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  /\  0  <  (
y  -  x ) )  ->  y  e.  RR )
5856, 57posdifd 8451 . . . . . . . . . . 11  |-  ( ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  /\  0  <  (
y  -  x ) )  ->  ( x  <  y  <->  0  <  (
y  -  x ) ) )
5955, 58mpbird 166 . . . . . . . . . 10  |-  ( ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  /\  0  <  (
y  -  x ) )  ->  x  <  y )
60593mix1d 1167 . . . . . . . . 9  |-  ( ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  /\  0  <  (
y  -  x ) )  ->  ( x  <  y  \/  x  =  y  \/  y  < 
x ) )
6147recnd 7948 . . . . . . . . . . . 12  |-  ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  ->  y  e.  CC )
6250recnd 7948 . . . . . . . . . . . 12  |-  ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  ->  x  e.  CC )
6361, 62subcld 8230 . . . . . . . . . . 11  |-  ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  ->  ( y  -  x )  e.  CC )
64 simplr 525 . . . . . . . . . . . 12  |-  ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  ->  z  e.  RR )
6564recnd 7948 . . . . . . . . . . 11  |-  ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  ->  z  e.  CC )
66 simpr 109 . . . . . . . . . . . 12  |-  ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  ->  ( ( y  -  x )  x.  z )  =  1 )
67 1ap0 8509 . . . . . . . . . . . 12  |-  1 #  0
6866, 67eqbrtrdi 4028 . . . . . . . . . . 11  |-  ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  ->  ( ( y  -  x )  x.  z ) #  0 )
6963, 65, 68mulap0bad 8577 . . . . . . . . . 10  |-  ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  ->  ( y  -  x ) #  0 )
7046, 49resubcld 8300 . . . . . . . . . . . 12  |-  ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  -> 
( y  -  x
)  e.  RR )
7170ad2antrr 485 . . . . . . . . . . 11  |-  ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  ->  ( y  -  x )  e.  RR )
72 reaplt 8507 . . . . . . . . . . 11  |-  ( ( ( y  -  x
)  e.  RR  /\  0  e.  RR )  ->  ( ( y  -  x ) #  0  <->  ( (
y  -  x )  <  0  \/  0  <  ( y  -  x ) ) ) )
7371, 21, 72sylancl 411 . . . . . . . . . 10  |-  ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  ->  ( ( y  -  x ) #  0  <-> 
( ( y  -  x )  <  0  \/  0  <  ( y  -  x ) ) ) )
7469, 73mpbid 146 . . . . . . . . 9  |-  ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  ->  ( ( y  -  x )  <  0  \/  0  < 
( y  -  x
) ) )
7554, 60, 74mpjaodan 793 . . . . . . . 8  |-  ( ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  z  e.  RR )  /\  ( ( y  -  x )  x.  z
)  =  1 )  ->  ( x  < 
y  \/  x  =  y  \/  y  < 
x ) )
7675exp31 362 . . . . . . 7  |-  ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  -> 
( z  e.  RR  ->  ( ( ( y  -  x )  x.  z )  =  1  ->  ( x  < 
y  \/  x  =  y  \/  y  < 
x ) ) ) )
7743, 44, 76rexlimd 2584 . . . . . 6  |-  ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  -> 
( E. z  e.  RR  ( ( y  -  x )  x.  z )  =  1  ->  ( x  < 
y  \/  x  =  y  \/  y  < 
x ) ) )
7877imp 123 . . . . 5  |-  ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  E. z  e.  RR  (
( y  -  x
)  x.  z )  =  1 )  -> 
( x  <  y  \/  x  =  y  \/  y  <  x ) )
7946recnd 7948 . . . . . . . . 9  |-  ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  -> 
y  e.  CC )
8079adantr 274 . . . . . . . 8  |-  ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  ( y  -  x
)  =  0 )  ->  y  e.  CC )
8149recnd 7948 . . . . . . . . 9  |-  ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  ->  x  e.  CC )
8281adantr 274 . . . . . . . 8  |-  ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  ( y  -  x
)  =  0 )  ->  x  e.  CC )
83 simpr 109 . . . . . . . 8  |-  ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  ( y  -  x
)  =  0 )  ->  ( y  -  x )  =  0 )
8480, 82, 83subeq0d 8238 . . . . . . 7  |-  ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  ( y  -  x
)  =  0 )  ->  y  =  x )
8584equcomd 1700 . . . . . 6  |-  ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  ( y  -  x
)  =  0 )  ->  x  =  y )
86853mix2d 1168 . . . . 5  |-  ( ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  /\  ( y  -  x
)  =  0 )  ->  ( x  < 
y  \/  x  =  y  \/  y  < 
x ) )
87 oveq1 5860 . . . . . . . . 9  |-  ( w  =  ( y  -  x )  ->  (
w  x.  z )  =  ( ( y  -  x )  x.  z ) )
8887eqeq1d 2179 . . . . . . . 8  |-  ( w  =  ( y  -  x )  ->  (
( w  x.  z
)  =  1  <->  (
( y  -  x
)  x.  z )  =  1 ) )
8988rexbidv 2471 . . . . . . 7  |-  ( w  =  ( y  -  x )  ->  ( E. z  e.  RR  ( w  x.  z
)  =  1  <->  E. z  e.  RR  (
( y  -  x
)  x.  z )  =  1 ) )
90 eqeq1 2177 . . . . . . 7  |-  ( w  =  ( y  -  x )  ->  (
w  =  0  <->  (
y  -  x )  =  0 ) )
9189, 90orbi12d 788 . . . . . 6  |-  ( w  =  ( y  -  x )  ->  (
( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )  <->  ( E. z  e.  RR  ( ( y  -  x )  x.  z )  =  1  \/  ( y  -  x )  =  0 ) ) )
92 simpl 108 . . . . . 6  |-  ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  ->  A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 ) )
9391, 92, 70rspcdva 2839 . . . . 5  |-  ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  -> 
( E. z  e.  RR  ( ( y  -  x )  x.  z )  =  1  \/  ( y  -  x )  =  0 ) )
9478, 86, 93mpjaodan 793 . . . 4  |-  ( ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  /\  ( x  e.  RR  /\  y  e.  RR ) )  -> 
( x  <  y  \/  x  =  y  \/  y  <  x ) )
9594ralrimivva 2552 . . 3  |-  ( A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )  ->  A. x  e.  RR  A. y  e.  RR  (
x  <  y  \/  x  =  y  \/  y  <  x ) )
9636, 95sylbi 120 . 2  |-  ( A. x  e.  RR  ( E. z  e.  RR  ( x  x.  z
)  =  1  \/  x  =  0 )  ->  A. x  e.  RR  A. y  e.  RR  (
x  <  y  \/  x  =  y  \/  y  <  x ) )
9730, 96impbii 125 1  |-  ( A. x  e.  RR  A. y  e.  RR  ( x  < 
y  \/  x  =  y  \/  y  < 
x )  <->  A. x  e.  RR  ( E. z  e.  RR  ( x  x.  z )  =  1  \/  x  =  0 ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 103    <-> wb 104    \/ wo 703    \/ w3o 972    = wceq 1348    e. wcel 2141   A.wral 2448   E.wrex 2449   class class class wbr 3989  (class class class)co 5853   CCcc 7772   RRcr 7773   0cc0 7774   1c1 7775    x. cmul 7779    < clt 7954    - cmin 8090   # cap 8500    / cdiv 8589
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 609  ax-in2 610  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-13 2143  ax-14 2144  ax-ext 2152  ax-sep 4107  ax-pow 4160  ax-pr 4194  ax-un 4418  ax-setind 4521  ax-cnex 7865  ax-resscn 7866  ax-1cn 7867  ax-1re 7868  ax-icn 7869  ax-addcl 7870  ax-addrcl 7871  ax-mulcl 7872  ax-mulrcl 7873  ax-addcom 7874  ax-mulcom 7875  ax-addass 7876  ax-mulass 7877  ax-distr 7878  ax-i2m1 7879  ax-0lt1 7880  ax-1rid 7881  ax-0id 7882  ax-rnegex 7883  ax-precex 7884  ax-cnre 7885  ax-pre-ltirr 7886  ax-pre-ltwlin 7887  ax-pre-lttrn 7888  ax-pre-apti 7889  ax-pre-ltadd 7890  ax-pre-mulgt0 7891  ax-pre-mulext 7892
This theorem depends on definitions:  df-bi 116  df-3or 974  df-3an 975  df-tru 1351  df-fal 1354  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ne 2341  df-nel 2436  df-ral 2453  df-rex 2454  df-reu 2455  df-rmo 2456  df-rab 2457  df-v 2732  df-sbc 2956  df-dif 3123  df-un 3125  df-in 3127  df-ss 3134  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-uni 3797  df-br 3990  df-opab 4051  df-id 4278  df-po 4281  df-iso 4282  df-xp 4617  df-rel 4618  df-cnv 4619  df-co 4620  df-dm 4621  df-iota 5160  df-fun 5200  df-fv 5206  df-riota 5809  df-ov 5856  df-oprab 5857  df-mpo 5858  df-pnf 7956  df-mnf 7957  df-xr 7958  df-ltxr 7959  df-le 7960  df-sub 8092  df-neg 8093  df-reap 8494  df-ap 8501  df-div 8590
This theorem is referenced by:  trirec0xor  14077
  Copyright terms: Public domain W3C validator