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Theorem trirec0 15534
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 15533). (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 527 . . . . . 6  |-  ( ( ( x  e.  RR  /\ 
A. y  e.  RR  ( x  <  y  \/  x  =  y  \/  y  <  x ) )  /\  x  <  0 )  ->  x  e.  RR )
2 simpr 110 . . . . . . 7  |-  ( ( ( x  e.  RR  /\ 
A. y  e.  RR  ( x  <  y  \/  x  =  y  \/  y  <  x ) )  /\  x  <  0 )  ->  x  <  0 )
31, 2lt0ap0d 8668 . . . . . 6  |-  ( ( ( x  e.  RR  /\ 
A. y  e.  RR  ( x  <  y  \/  x  =  y  \/  y  <  x ) )  /\  x  <  0 )  ->  x #  0 )
4 rerecclap 8749 . . . . . . 7  |-  ( ( x  e.  RR  /\  x #  0 )  ->  (
1  /  x )  e.  RR )
5 recn 8005 . . . . . . . 8  |-  ( x  e.  RR  ->  x  e.  CC )
6 recidap 8705 . . . . . . . 8  |-  ( ( x  e.  CC  /\  x #  0 )  ->  (
x  x.  ( 1  /  x ) )  =  1 )
75, 6sylan 283 . . . . . . 7  |-  ( ( x  e.  RR  /\  x #  0 )  ->  (
x  x.  ( 1  /  x ) )  =  1 )
8 oveq2 5926 . . . . . . . . 9  |-  ( z  =  ( 1  /  x )  ->  (
x  x.  z )  =  ( x  x.  ( 1  /  x
) ) )
98eqeq1d 2202 . . . . . . . 8  |-  ( z  =  ( 1  /  x )  ->  (
( x  x.  z
)  =  1  <->  (
x  x.  ( 1  /  x ) )  =  1 ) )
109rspcev 2864 . . . . . . 7  |-  ( ( ( 1  /  x
)  e.  RR  /\  ( x  x.  (
1  /  x ) )  =  1 )  ->  E. z  e.  RR  ( x  x.  z
)  =  1 )
114, 7, 10syl2anc 411 . . . . . 6  |-  ( ( x  e.  RR  /\  x #  0 )  ->  E. z  e.  RR  ( x  x.  z )  =  1 )
121, 3, 11syl2anc 411 . . . . 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 734 . . . 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 110 . . . . 5  |-  ( ( ( x  e.  RR  /\ 
A. y  e.  RR  ( x  <  y  \/  x  =  y  \/  y  <  x ) )  /\  x  =  0 )  ->  x  =  0 )
1514olcd 735 . . . 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 527 . . . . . 6  |-  ( ( ( x  e.  RR  /\ 
A. y  e.  RR  ( x  <  y  \/  x  =  y  \/  y  <  x ) )  /\  0  < 
x )  ->  x  e.  RR )
17 simpr 110 . . . . . . 7  |-  ( ( ( x  e.  RR  /\ 
A. y  e.  RR  ( x  <  y  \/  x  =  y  \/  y  <  x ) )  /\  0  < 
x )  ->  0  <  x )
1816, 17gt0ap0d 8648 . . . . . 6  |-  ( ( ( x  e.  RR  /\ 
A. y  e.  RR  ( x  <  y  \/  x  =  y  \/  y  <  x ) )  /\  0  < 
x )  ->  x #  0 )
1916, 18, 11syl2anc 411 . . . . 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 734 . . . 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 8019 . . . . . 6  |-  0  e.  RR
22 breq2 4033 . . . . . . . 8  |-  ( y  =  0  ->  (
x  <  y  <->  x  <  0 ) )
23 eqeq2 2203 . . . . . . . 8  |-  ( y  =  0  ->  (
x  =  y  <->  x  = 
0 ) )
24 breq1 4032 . . . . . . . 8  |-  ( y  =  0  ->  (
y  <  x  <->  0  <  x ) )
2522, 23, 243orbi123d 1322 . . . . . . 7  |-  ( y  =  0  ->  (
( x  <  y  \/  x  =  y  \/  y  <  x )  <-> 
( x  <  0  \/  x  =  0  \/  0  <  x ) ) )
2625rspcv 2860 . . . . . 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 277 . . . 4  |-  ( ( x  e.  RR  /\  A. y  e.  RR  (
x  <  y  \/  x  =  y  \/  y  <  x ) )  ->  ( x  <  0  \/  x  =  0  \/  0  < 
x ) )
2913, 15, 20, 28mpjao3dan 1318 . . 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 2556 . 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 5925 . . . . . . 7  |-  ( x  =  w  ->  (
x  x.  z )  =  ( w  x.  z ) )
3231eqeq1d 2202 . . . . . 6  |-  ( x  =  w  ->  (
( x  x.  z
)  =  1  <->  (
w  x.  z )  =  1 ) )
3332rexbidv 2495 . . . . 5  |-  ( x  =  w  ->  ( E. z  e.  RR  ( x  x.  z
)  =  1  <->  E. z  e.  RR  (
w  x.  z )  =  1 ) )
34 eqeq1 2200 . . . . 5  |-  ( x  =  w  ->  (
x  =  0  <->  w  =  0 ) )
3533, 34orbi12d 794 . . . 4  |-  ( x  =  w  ->  (
( E. z  e.  RR  ( x  x.  z )  =  1  \/  x  =  0 )  <->  ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 ) ) )
3635cbvralv 2726 . . 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 2336 . . . . . . . . 9  |-  F/_ z RR
38 nfre1 2537 . . . . . . . . . 10  |-  F/ z E. z  e.  RR  ( w  x.  z
)  =  1
39 nfv 1539 . . . . . . . . . 10  |-  F/ z  w  =  0
4038, 39nfor 1585 . . . . . . . . 9  |-  F/ z ( E. z  e.  RR  ( w  x.  z )  =  1  \/  w  =  0 )
4137, 40nfralya 2534 . . . . . . . 8  |-  F/ z A. w  e.  RR  ( E. z  e.  RR  ( w  x.  z
)  =  1  \/  w  =  0 )
42 nfv 1539 . . . . . . . 8  |-  F/ z ( x  e.  RR  /\  y  e.  RR )
4341, 42nfan 1576 . . . . . . 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 1539 . . . . . . 7  |-  F/ z ( x  <  y  \/  x  =  y  \/  y  <  x )
45 simpr 110 . . . . . . . . . . 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 531 . . . . . . . . . . . . . 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 488 . . . . . . . . . . . . 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 276 . . . . . . . . . . . 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 529 . . . . . . . . . . . . . 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 488 . . . . . . . . . . . . 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 276 . . . . . . . . . . . 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 8589 . . . . . . . . . . 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 147 . . . . . . . . . 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 1176 . . . . . . . . 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 110 . . . . . . . . . . 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 276 . . . . . . . . . . . 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 276 . . . . . . . . . . . 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 8551 . . . . . . . . . . 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 167 . . . . . . . . . 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 1174 . . . . . . . . 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 8048 . . . . . . . . . . . 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 8048 . . . . . . . . . . . 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 8330 . . . . . . . . . . 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 528 . . . . . . . . . . . 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 8048 . . . . . . . . . . 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 110 . . . . . . . . . . . 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 8609 . . . . . . . . . . . 12  |-  1 #  0
6866, 67eqbrtrdi 4068 . . . . . . . . . . 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 8678 . . . . . . . . . 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 8400 . . . . . . . . . . . 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 488 . . . . . . . . . . 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 8607 . . . . . . . . . . 11  |-  ( ( ( y  -  x
)  e.  RR  /\  0  e.  RR )  ->  ( ( y  -  x ) #  0  <->  ( (
y  -  x )  <  0  \/  0  <  ( y  -  x ) ) ) )
7371, 21, 72sylancl 413 . . . . . . . . . 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 147 . . . . . . . . 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 799 . . . . . . . 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 364 . . . . . . 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 2608 . . . . . 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 124 . . . . 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 8048 . . . . . . . . 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 276 . . . . . . . 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 8048 . . . . . . . . 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 276 . . . . . . . 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 110 . . . . . . . 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 8338 . . . . . . 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 1718 . . . . . 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 1175 . . . . 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 5925 . . . . . . . . 9  |-  ( w  =  ( y  -  x )  ->  (
w  x.  z )  =  ( ( y  -  x )  x.  z ) )
8887eqeq1d 2202 . . . . . . . 8  |-  ( w  =  ( y  -  x )  ->  (
( w  x.  z
)  =  1  <->  (
( y  -  x
)  x.  z )  =  1 ) )
8988rexbidv 2495 . . . . . . 7  |-  ( w  =  ( y  -  x )  ->  ( E. z  e.  RR  ( w  x.  z
)  =  1  <->  E. z  e.  RR  (
( y  -  x
)  x.  z )  =  1 ) )
90 eqeq1 2200 . . . . . . 7  |-  ( w  =  ( y  -  x )  ->  (
w  =  0  <->  (
y  -  x )  =  0 ) )
9189, 90orbi12d 794 . . . . . 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 109 . . . . . 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 2869 . . . . 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 799 . . . 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 2576 . . 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 121 . 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 126 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 104    <-> wb 105    \/ wo 709    \/ w3o 979    = wceq 1364    e. wcel 2164   A.wral 2472   E.wrex 2473   class class class wbr 4029  (class class class)co 5918   CCcc 7870   RRcr 7871   0cc0 7872   1c1 7873    x. cmul 7877    < clt 8054    - cmin 8190   # cap 8600    / cdiv 8691
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 615  ax-in2 616  ax-io 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-13 2166  ax-14 2167  ax-ext 2175  ax-sep 4147  ax-pow 4203  ax-pr 4238  ax-un 4464  ax-setind 4569  ax-cnex 7963  ax-resscn 7964  ax-1cn 7965  ax-1re 7966  ax-icn 7967  ax-addcl 7968  ax-addrcl 7969  ax-mulcl 7970  ax-mulrcl 7971  ax-addcom 7972  ax-mulcom 7973  ax-addass 7974  ax-mulass 7975  ax-distr 7976  ax-i2m1 7977  ax-0lt1 7978  ax-1rid 7979  ax-0id 7980  ax-rnegex 7981  ax-precex 7982  ax-cnre 7983  ax-pre-ltirr 7984  ax-pre-ltwlin 7985  ax-pre-lttrn 7986  ax-pre-apti 7987  ax-pre-ltadd 7988  ax-pre-mulgt0 7989  ax-pre-mulext 7990
This theorem depends on definitions:  df-bi 117  df-3or 981  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1472  df-sb 1774  df-eu 2045  df-mo 2046  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-ne 2365  df-nel 2460  df-ral 2477  df-rex 2478  df-reu 2479  df-rmo 2480  df-rab 2481  df-v 2762  df-sbc 2986  df-dif 3155  df-un 3157  df-in 3159  df-ss 3166  df-pw 3603  df-sn 3624  df-pr 3625  df-op 3627  df-uni 3836  df-br 4030  df-opab 4091  df-id 4324  df-po 4327  df-iso 4328  df-xp 4665  df-rel 4666  df-cnv 4667  df-co 4668  df-dm 4669  df-iota 5215  df-fun 5256  df-fv 5262  df-riota 5873  df-ov 5921  df-oprab 5922  df-mpo 5923  df-pnf 8056  df-mnf 8057  df-xr 8058  df-ltxr 8059  df-le 8060  df-sub 8192  df-neg 8193  df-reap 8594  df-ap 8601  df-div 8692
This theorem is referenced by:  trirec0xor  15535
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