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Theorem xnegdi 11485
Description: Extended real version of xnegdi 11485. (Contributed by Mario Carneiro, 20-Aug-2015.)
Assertion
Ref Expression
xnegdi  |-  ( ( A  e.  RR*  /\  B  e.  RR* )  ->  -e
( A +e
B )  =  ( 
-e A +e  -e B ) )

Proof of Theorem xnegdi
StepHypRef Expression
1 elxr 11367 . 2  |-  ( A  e.  RR*  <->  ( A  e.  RR  \/  A  = +oo  \/  A  = -oo ) )
2 elxr 11367 . . . 4  |-  ( B  e.  RR*  <->  ( B  e.  RR  \/  B  = +oo  \/  B  = -oo ) )
3 recn 9580 . . . . . . . 8  |-  ( A  e.  RR  ->  A  e.  CC )
4 recn 9580 . . . . . . . 8  |-  ( B  e.  RR  ->  B  e.  CC )
5 negdi 9882 . . . . . . . 8  |-  ( ( A  e.  CC  /\  B  e.  CC )  -> 
-u ( A  +  B )  =  (
-u A  +  -u B ) )
63, 4, 5syl2an 479 . . . . . . 7  |-  ( ( A  e.  RR  /\  B  e.  RR )  -> 
-u ( A  +  B )  =  (
-u A  +  -u B ) )
7 readdcl 9573 . . . . . . . 8  |-  ( ( A  e.  RR  /\  B  e.  RR )  ->  ( A  +  B
)  e.  RR )
8 rexneg 11455 . . . . . . . 8  |-  ( ( A  +  B )  e.  RR  ->  -e
( A  +  B
)  =  -u ( A  +  B )
)
97, 8syl 17 . . . . . . 7  |-  ( ( A  e.  RR  /\  B  e.  RR )  -> 
-e ( A  +  B )  = 
-u ( A  +  B ) )
10 renegcl 9888 . . . . . . . 8  |-  ( A  e.  RR  ->  -u A  e.  RR )
11 renegcl 9888 . . . . . . . 8  |-  ( B  e.  RR  ->  -u B  e.  RR )
12 rexadd 11476 . . . . . . . 8  |-  ( (
-u A  e.  RR  /\  -u B  e.  RR )  ->  ( -u A +e -u B
)  =  ( -u A  +  -u B ) )
1310, 11, 12syl2an 479 . . . . . . 7  |-  ( ( A  e.  RR  /\  B  e.  RR )  ->  ( -u A +e -u B )  =  ( -u A  +  -u B ) )
146, 9, 133eqtr4d 2472 . . . . . 6  |-  ( ( A  e.  RR  /\  B  e.  RR )  -> 
-e ( A  +  B )  =  ( -u A +e -u B ) )
15 rexadd 11476 . . . . . . 7  |-  ( ( A  e.  RR  /\  B  e.  RR )  ->  ( A +e
B )  =  ( A  +  B ) )
16 xnegeq 11451 . . . . . . 7  |-  ( ( A +e B )  =  ( A  +  B )  ->  -e ( A +e B )  = 
-e ( A  +  B ) )
1715, 16syl 17 . . . . . 6  |-  ( ( A  e.  RR  /\  B  e.  RR )  -> 
-e ( A +e B )  =  -e ( A  +  B ) )
18 rexneg 11455 . . . . . . 7  |-  ( A  e.  RR  ->  -e
A  =  -u A
)
19 rexneg 11455 . . . . . . 7  |-  ( B  e.  RR  ->  -e
B  =  -u B
)
2018, 19oveqan12d 6268 . . . . . 6  |-  ( ( A  e.  RR  /\  B  e.  RR )  ->  (  -e A +e  -e
B )  =  (
-u A +e -u B ) )
2114, 17, 203eqtr4d 2472 . . . . 5  |-  ( ( A  e.  RR  /\  B  e.  RR )  -> 
-e ( A +e B )  =  (  -e
A +e  -e B ) )
22 xnegpnf 11453 . . . . . 6  |-  -e +oo  = -oo
23 oveq2 6257 . . . . . . . 8  |-  ( B  = +oo  ->  ( A +e B )  =  ( A +e +oo ) )
24 rexr 9637 . . . . . . . . 9  |-  ( A  e.  RR  ->  A  e.  RR* )
25 renemnf 9640 . . . . . . . . 9  |-  ( A  e.  RR  ->  A  =/= -oo )
26 xaddpnf1 11470 . . . . . . . . 9  |-  ( ( A  e.  RR*  /\  A  =/= -oo )  ->  ( A +e +oo )  = +oo )
2724, 25, 26syl2anc 665 . . . . . . . 8  |-  ( A  e.  RR  ->  ( A +e +oo )  = +oo )
2823, 27sylan9eqr 2484 . . . . . . 7  |-  ( ( A  e.  RR  /\  B  = +oo )  ->  ( A +e
B )  = +oo )
29 xnegeq 11451 . . . . . . 7  |-  ( ( A +e B )  = +oo  ->  -e ( A +e B )  = 
-e +oo )
3028, 29syl 17 . . . . . 6  |-  ( ( A  e.  RR  /\  B  = +oo )  -> 
-e ( A +e B )  =  -e +oo )
31 xnegeq 11451 . . . . . . . . 9  |-  ( B  = +oo  ->  -e
B  =  -e +oo )
3231, 22syl6eq 2478 . . . . . . . 8  |-  ( B  = +oo  ->  -e
B  = -oo )
3332oveq2d 6265 . . . . . . 7  |-  ( B  = +oo  ->  (  -e A +e  -e B )  =  (  -e A +e -oo )
)
3418, 10eqeltrd 2506 . . . . . . . 8  |-  ( A  e.  RR  ->  -e
A  e.  RR )
35 rexr 9637 . . . . . . . . 9  |-  (  -e A  e.  RR  -> 
-e A  e. 
RR* )
36 renepnf 9639 . . . . . . . . 9  |-  (  -e A  e.  RR  -> 
-e A  =/= +oo )
37 xaddmnf1 11472 . . . . . . . . 9  |-  ( ( 
-e A  e. 
RR*  /\  -e A  =/= +oo )  -> 
(  -e A +e -oo )  = -oo )
3835, 36, 37syl2anc 665 . . . . . . . 8  |-  (  -e A  e.  RR  ->  (  -e A +e -oo )  = -oo )
3934, 38syl 17 . . . . . . 7  |-  ( A  e.  RR  ->  (  -e A +e -oo )  = -oo )
4033, 39sylan9eqr 2484 . . . . . 6  |-  ( ( A  e.  RR  /\  B  = +oo )  ->  (  -e A +e  -e
B )  = -oo )
4122, 30, 403eqtr4a 2488 . . . . 5  |-  ( ( A  e.  RR  /\  B  = +oo )  -> 
-e ( A +e B )  =  (  -e
A +e  -e B ) )
42 xnegmnf 11454 . . . . . 6  |-  -e -oo  = +oo
43 oveq2 6257 . . . . . . . 8  |-  ( B  = -oo  ->  ( A +e B )  =  ( A +e -oo ) )
44 renepnf 9639 . . . . . . . . 9  |-  ( A  e.  RR  ->  A  =/= +oo )
45 xaddmnf1 11472 . . . . . . . . 9  |-  ( ( A  e.  RR*  /\  A  =/= +oo )  ->  ( A +e -oo )  = -oo )
4624, 44, 45syl2anc 665 . . . . . . . 8  |-  ( A  e.  RR  ->  ( A +e -oo )  = -oo )
4743, 46sylan9eqr 2484 . . . . . . 7  |-  ( ( A  e.  RR  /\  B  = -oo )  ->  ( A +e
B )  = -oo )
48 xnegeq 11451 . . . . . . 7  |-  ( ( A +e B )  = -oo  ->  -e ( A +e B )  = 
-e -oo )
4947, 48syl 17 . . . . . 6  |-  ( ( A  e.  RR  /\  B  = -oo )  -> 
-e ( A +e B )  =  -e -oo )
50 xnegeq 11451 . . . . . . . . 9  |-  ( B  = -oo  ->  -e
B  =  -e -oo )
5150, 42syl6eq 2478 . . . . . . . 8  |-  ( B  = -oo  ->  -e
B  = +oo )
5251oveq2d 6265 . . . . . . 7  |-  ( B  = -oo  ->  (  -e A +e  -e B )  =  (  -e A +e +oo )
)
53 renemnf 9640 . . . . . . . . 9  |-  (  -e A  e.  RR  -> 
-e A  =/= -oo )
54 xaddpnf1 11470 . . . . . . . . 9  |-  ( ( 
-e A  e. 
RR*  /\  -e A  =/= -oo )  -> 
(  -e A +e +oo )  = +oo )
5535, 53, 54syl2anc 665 . . . . . . . 8  |-  (  -e A  e.  RR  ->  (  -e A +e +oo )  = +oo )
5634, 55syl 17 . . . . . . 7  |-  ( A  e.  RR  ->  (  -e A +e +oo )  = +oo )
5752, 56sylan9eqr 2484 . . . . . 6  |-  ( ( A  e.  RR  /\  B  = -oo )  ->  (  -e A +e  -e
B )  = +oo )
5842, 49, 573eqtr4a 2488 . . . . 5  |-  ( ( A  e.  RR  /\  B  = -oo )  -> 
-e ( A +e B )  =  (  -e
A +e  -e B ) )
5921, 41, 583jaodan 1330 . . . 4  |-  ( ( A  e.  RR  /\  ( B  e.  RR  \/  B  = +oo  \/  B  = -oo ) )  ->  -e
( A +e
B )  =  ( 
-e A +e  -e B ) )
602, 59sylan2b 477 . . 3  |-  ( ( A  e.  RR  /\  B  e.  RR* )  ->  -e ( A +e B )  =  (  -e A +e  -e
B ) )
61 xneg0 11456 . . . . . . 7  |-  -e 0  =  0
62 simpr 462 . . . . . . . . . 10  |-  ( ( B  e.  RR*  /\  B  = -oo )  ->  B  = -oo )
6362oveq2d 6265 . . . . . . . . 9  |-  ( ( B  e.  RR*  /\  B  = -oo )  ->  ( +oo +e B )  =  ( +oo +e -oo ) )
64 pnfaddmnf 11474 . . . . . . . . 9  |-  ( +oo +e -oo )  =  0
6563, 64syl6eq 2478 . . . . . . . 8  |-  ( ( B  e.  RR*  /\  B  = -oo )  ->  ( +oo +e B )  =  0 )
66 xnegeq 11451 . . . . . . . 8  |-  ( ( +oo +e B )  =  0  ->  -e ( +oo +e B )  = 
-e 0 )
6765, 66syl 17 . . . . . . 7  |-  ( ( B  e.  RR*  /\  B  = -oo )  ->  -e
( +oo +e B )  =  -e 0 )
6851adantl 467 . . . . . . . . 9  |-  ( ( B  e.  RR*  /\  B  = -oo )  ->  -e
B  = +oo )
6968oveq2d 6265 . . . . . . . 8  |-  ( ( B  e.  RR*  /\  B  = -oo )  ->  ( -oo +e  -e
B )  =  ( -oo +e +oo ) )
70 mnfaddpnf 11475 . . . . . . . 8  |-  ( -oo +e +oo )  =  0
7169, 70syl6eq 2478 . . . . . . 7  |-  ( ( B  e.  RR*  /\  B  = -oo )  ->  ( -oo +e  -e
B )  =  0 )
7261, 67, 713eqtr4a 2488 . . . . . 6  |-  ( ( B  e.  RR*  /\  B  = -oo )  ->  -e
( +oo +e B )  =  ( -oo +e  -e B ) )
73 xaddpnf2 11471 . . . . . . . 8  |-  ( ( B  e.  RR*  /\  B  =/= -oo )  ->  ( +oo +e B )  = +oo )
74 xnegeq 11451 . . . . . . . 8  |-  ( ( +oo +e B )  = +oo  ->  -e ( +oo +e B )  = 
-e +oo )
7573, 74syl 17 . . . . . . 7  |-  ( ( B  e.  RR*  /\  B  =/= -oo )  ->  -e
( +oo +e B )  =  -e +oo )
76 xnegcl 11457 . . . . . . . . 9  |-  ( B  e.  RR*  ->  -e
B  e.  RR* )
7776adantr 466 . . . . . . . 8  |-  ( ( B  e.  RR*  /\  B  =/= -oo )  ->  -e
B  e.  RR* )
78 xnegeq 11451 . . . . . . . . . . . 12  |-  (  -e B  = +oo  -> 
-e  -e
B  =  -e +oo )
7978, 22syl6eq 2478 . . . . . . . . . . 11  |-  (  -e B  = +oo  -> 
-e  -e
B  = -oo )
80 xnegneg 11458 . . . . . . . . . . . 12  |-  ( B  e.  RR*  ->  -e  -e B  =  B )
8180eqeq1d 2430 . . . . . . . . . . 11  |-  ( B  e.  RR*  ->  (  -e  -e B  = -oo  <->  B  = -oo ) )
8279, 81syl5ib 222 . . . . . . . . . 10  |-  ( B  e.  RR*  ->  (  -e B  = +oo  ->  B  = -oo )
)
8382necon3d 2622 . . . . . . . . 9  |-  ( B  e.  RR*  ->  ( B  =/= -oo  ->  -e
B  =/= +oo )
)
8483imp 430 . . . . . . . 8  |-  ( ( B  e.  RR*  /\  B  =/= -oo )  ->  -e
B  =/= +oo )
85 xaddmnf2 11473 . . . . . . . 8  |-  ( ( 
-e B  e. 
RR*  /\  -e B  =/= +oo )  -> 
( -oo +e  -e B )  = -oo )
8677, 84, 85syl2anc 665 . . . . . . 7  |-  ( ( B  e.  RR*  /\  B  =/= -oo )  ->  ( -oo +e  -e
B )  = -oo )
8722, 75, 863eqtr4a 2488 . . . . . 6  |-  ( ( B  e.  RR*  /\  B  =/= -oo )  ->  -e
( +oo +e B )  =  ( -oo +e  -e B ) )
8872, 87pm2.61dane 2688 . . . . 5  |-  ( B  e.  RR*  ->  -e
( +oo +e B )  =  ( -oo +e  -e B ) )
8988adantl 467 . . . 4  |-  ( ( A  = +oo  /\  B  e.  RR* )  ->  -e ( +oo +e B )  =  ( -oo +e  -e B ) )
90 simpl 458 . . . . . 6  |-  ( ( A  = +oo  /\  B  e.  RR* )  ->  A  = +oo )
9190oveq1d 6264 . . . . 5  |-  ( ( A  = +oo  /\  B  e.  RR* )  -> 
( A +e
B )  =  ( +oo +e B ) )
92 xnegeq 11451 . . . . 5  |-  ( ( A +e B )  =  ( +oo +e B )  ->  -e ( A +e B )  =  -e ( +oo +e B ) )
9391, 92syl 17 . . . 4  |-  ( ( A  = +oo  /\  B  e.  RR* )  ->  -e ( A +e B )  = 
-e ( +oo +e B ) )
94 xnegeq 11451 . . . . . . 7  |-  ( A  = +oo  ->  -e
A  =  -e +oo )
9594adantr 466 . . . . . 6  |-  ( ( A  = +oo  /\  B  e.  RR* )  ->  -e A  =  -e +oo )
9695, 22syl6eq 2478 . . . . 5  |-  ( ( A  = +oo  /\  B  e.  RR* )  ->  -e A  = -oo )
9796oveq1d 6264 . . . 4  |-  ( ( A  = +oo  /\  B  e.  RR* )  -> 
(  -e A +e  -e B )  =  ( -oo +e  -e B ) )
9889, 93, 973eqtr4d 2472 . . 3  |-  ( ( A  = +oo  /\  B  e.  RR* )  ->  -e ( A +e B )  =  (  -e A +e  -e
B ) )
99 simpr 462 . . . . . . . . . 10  |-  ( ( B  e.  RR*  /\  B  = +oo )  ->  B  = +oo )
10099oveq2d 6265 . . . . . . . . 9  |-  ( ( B  e.  RR*  /\  B  = +oo )  ->  ( -oo +e B )  =  ( -oo +e +oo ) )
101100, 70syl6eq 2478 . . . . . . . 8  |-  ( ( B  e.  RR*  /\  B  = +oo )  ->  ( -oo +e B )  =  0 )
102 xnegeq 11451 . . . . . . . 8  |-  ( ( -oo +e B )  =  0  ->  -e ( -oo +e B )  = 
-e 0 )
103101, 102syl 17 . . . . . . 7  |-  ( ( B  e.  RR*  /\  B  = +oo )  ->  -e
( -oo +e B )  =  -e 0 )
10432adantl 467 . . . . . . . . 9  |-  ( ( B  e.  RR*  /\  B  = +oo )  ->  -e
B  = -oo )
105104oveq2d 6265 . . . . . . . 8  |-  ( ( B  e.  RR*  /\  B  = +oo )  ->  ( +oo +e  -e
B )  =  ( +oo +e -oo ) )
106105, 64syl6eq 2478 . . . . . . 7  |-  ( ( B  e.  RR*  /\  B  = +oo )  ->  ( +oo +e  -e
B )  =  0 )
10761, 103, 1063eqtr4a 2488 . . . . . 6  |-  ( ( B  e.  RR*  /\  B  = +oo )  ->  -e
( -oo +e B )  =  ( +oo +e  -e B ) )
108 xaddmnf2 11473 . . . . . . . 8  |-  ( ( B  e.  RR*  /\  B  =/= +oo )  ->  ( -oo +e B )  = -oo )
109 xnegeq 11451 . . . . . . . 8  |-  ( ( -oo +e B )  = -oo  ->  -e ( -oo +e B )  = 
-e -oo )
110108, 109syl 17 . . . . . . 7  |-  ( ( B  e.  RR*  /\  B  =/= +oo )  ->  -e
( -oo +e B )  =  -e -oo )
11176adantr 466 . . . . . . . 8  |-  ( ( B  e.  RR*  /\  B  =/= +oo )  ->  -e
B  e.  RR* )
112 xnegeq 11451 . . . . . . . . . . . 12  |-  (  -e B  = -oo  -> 
-e  -e
B  =  -e -oo )
113112, 42syl6eq 2478 . . . . . . . . . . 11  |-  (  -e B  = -oo  -> 
-e  -e
B  = +oo )
11480eqeq1d 2430 . . . . . . . . . . 11  |-  ( B  e.  RR*  ->  (  -e  -e B  = +oo  <->  B  = +oo ) )
115113, 114syl5ib 222 . . . . . . . . . 10  |-  ( B  e.  RR*  ->  (  -e B  = -oo  ->  B  = +oo )
)
116115necon3d 2622 . . . . . . . . 9  |-  ( B  e.  RR*  ->  ( B  =/= +oo  ->  -e
B  =/= -oo )
)
117116imp 430 . . . . . . . 8  |-  ( ( B  e.  RR*  /\  B  =/= +oo )  ->  -e
B  =/= -oo )
118 xaddpnf2 11471 . . . . . . . 8  |-  ( ( 
-e B  e. 
RR*  /\  -e B  =/= -oo )  -> 
( +oo +e  -e B )  = +oo )
119111, 117, 118syl2anc 665 . . . . . . 7  |-  ( ( B  e.  RR*  /\  B  =/= +oo )  ->  ( +oo +e  -e
B )  = +oo )
12042, 110, 1193eqtr4a 2488 . . . . . 6  |-  ( ( B  e.  RR*  /\  B  =/= +oo )  ->  -e
( -oo +e B )  =  ( +oo +e  -e B ) )
121107, 120pm2.61dane 2688 . . . . 5  |-  ( B  e.  RR*  ->  -e
( -oo +e B )  =  ( +oo +e  -e B ) )
122121adantl 467 . . . 4  |-  ( ( A  = -oo  /\  B  e.  RR* )  ->  -e ( -oo +e B )  =  ( +oo +e  -e B ) )
123 simpl 458 . . . . . 6  |-  ( ( A  = -oo  /\  B  e.  RR* )  ->  A  = -oo )
124123oveq1d 6264 . . . . 5  |-  ( ( A  = -oo  /\  B  e.  RR* )  -> 
( A +e
B )  =  ( -oo +e B ) )
125 xnegeq 11451 . . . . 5  |-  ( ( A +e B )  =  ( -oo +e B )  ->  -e ( A +e B )  =  -e ( -oo +e B ) )
126124, 125syl 17 . . . 4  |-  ( ( A  = -oo  /\  B  e.  RR* )  ->  -e ( A +e B )  = 
-e ( -oo +e B ) )
127 xnegeq 11451 . . . . . . 7  |-  ( A  = -oo  ->  -e
A  =  -e -oo )
128127adantr 466 . . . . . 6  |-  ( ( A  = -oo  /\  B  e.  RR* )  ->  -e A  =  -e -oo )
129128, 42syl6eq 2478 . . . . 5  |-  ( ( A  = -oo  /\  B  e.  RR* )  ->  -e A  = +oo )
130129oveq1d 6264 . . . 4  |-  ( ( A  = -oo  /\  B  e.  RR* )  -> 
(  -e A +e  -e B )  =  ( +oo +e  -e B ) )
131122, 126, 1303eqtr4d 2472 . . 3  |-  ( ( A  = -oo  /\  B  e.  RR* )  ->  -e ( A +e B )  =  (  -e A +e  -e
B ) )
13260, 98, 1313jaoian 1329 . 2  |-  ( ( ( A  e.  RR  \/  A  = +oo  \/  A  = -oo )  /\  B  e.  RR* )  ->  -e ( A +e B )  =  (  -e
A +e  -e B ) )
1331, 132sylanb 474 1  |-  ( ( A  e.  RR*  /\  B  e.  RR* )  ->  -e
( A +e
B )  =  ( 
-e A +e  -e B ) )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    /\ wa 370    \/ w3o 981    = wceq 1437    e. wcel 1872    =/= wne 2599  (class class class)co 6249   CCcc 9488   RRcr 9489   0cc0 9490    + caddc 9493   +oocpnf 9623   -oocmnf 9624   RR*cxr 9625   -ucneg 9812    -ecxne 11357   +ecxad 11358
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1663  ax-4 1676  ax-5 1752  ax-6 1798  ax-7 1843  ax-8 1874  ax-9 1876  ax-10 1891  ax-11 1896  ax-12 1909  ax-13 2063  ax-ext 2408  ax-sep 4489  ax-nul 4498  ax-pow 4545  ax-pr 4603  ax-un 6541  ax-cnex 9546  ax-resscn 9547  ax-1cn 9548  ax-icn 9549  ax-addcl 9550  ax-addrcl 9551  ax-mulcl 9552  ax-mulrcl 9553  ax-mulcom 9554  ax-addass 9555  ax-mulass 9556  ax-distr 9557  ax-i2m1 9558  ax-1ne0 9559  ax-1rid 9560  ax-rnegex 9561  ax-rrecex 9562  ax-cnre 9563  ax-pre-lttri 9564  ax-pre-lttrn 9565  ax-pre-ltadd 9566
This theorem depends on definitions:  df-bi 188  df-or 371  df-an 372  df-3or 983  df-3an 984  df-tru 1440  df-ex 1658  df-nf 1662  df-sb 1791  df-eu 2280  df-mo 2281  df-clab 2415  df-cleq 2421  df-clel 2424  df-nfc 2558  df-ne 2601  df-nel 2602  df-ral 2719  df-rex 2720  df-reu 2721  df-rab 2723  df-v 3024  df-sbc 3243  df-csb 3339  df-dif 3382  df-un 3384  df-in 3386  df-ss 3393  df-nul 3705  df-if 3855  df-pw 3926  df-sn 3942  df-pr 3944  df-op 3948  df-uni 4163  df-br 4367  df-opab 4426  df-mpt 4427  df-id 4711  df-po 4717  df-so 4718  df-xp 4802  df-rel 4803  df-cnv 4804  df-co 4805  df-dm 4806  df-rn 4807  df-res 4808  df-ima 4809  df-iota 5508  df-fun 5546  df-fn 5547  df-f 5548  df-f1 5549  df-fo 5550  df-f1o 5551  df-fv 5552  df-riota 6211  df-ov 6252  df-oprab 6253  df-mpt2 6254  df-er 7318  df-en 7525  df-dom 7526  df-sdom 7527  df-pnf 9628  df-mnf 9629  df-xr 9630  df-ltxr 9631  df-sub 9813  df-neg 9814  df-xneg 11360  df-xadd 11361
This theorem is referenced by:  xaddass2  11487  xposdif  11499  xadddi  11532  xrsxmet  21769
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