Theorem xaddid1 10058

Description: Extended real version of addrid 8284. (Contributed by Mario Carneiro, 20-Aug-2015.)

Assertion

Ref	Expression
xaddid1	|- ( A e. RR* -> ( A +e 0 ) = A )

Proof of Theorem xaddid1

Step	Hyp	Ref	Expression
1		elxr 9972	. 2 |- ( A e. RR* <-> ( A e. RR \/ A = +oo \/ A = -oo ) )
2		0re 8146	. . . . 5 |- 0 e. RR
3		rexadd 10048	. . . . 5 |- ( ( A e. RR /\ 0 e. RR ) -> ( A +e 0 ) = ( A + 0 ) )
4	2, 3	mpan2 425	. . . 4 |- ( A e. RR -> ( A +e 0 ) = ( A + 0 ) )
5		recn 8132	. . . . 5 |- ( A e. RR -> A e. CC )
6	5	addridd 8295	. . . 4 |- ( A e. RR -> ( A + 0 ) = A )
7	4, 6	eqtrd 2262	. . 3 |- ( A e. RR -> ( A +e 0 ) = A )
8		0xr 8193	. . . . 5 |- 0 e. RR*
9		renemnf 8195	. . . . . 6 |- ( 0 e. RR -> 0 =/= -oo )
10	2, 9	ax-mp 5	. . . . 5 |- 0 =/= -oo
11		xaddpnf2 10043	. . . . 5 |- ( ( 0 e. RR* /\ 0 =/= -oo ) -> ( +oo +e 0 ) = +oo )
12	8, 10, 11	mp2an 426	. . . 4 |- ( +oo +e 0 ) = +oo
13		oveq1 6008	. . . 4 |- ( A = +oo -> ( A +e 0 ) = ( +oo +e 0 ) )
14		id 19	. . . 4 |- ( A = +oo -> A = +oo )
15	12, 13, 14	3eqtr4a 2288	. . 3 |- ( A = +oo -> ( A +e 0 ) = A )
16		renepnf 8194	. . . . . 6 |- ( 0 e. RR -> 0 =/= +oo )
17	2, 16	ax-mp 5	. . . . 5 |- 0 =/= +oo
18		xaddmnf2 10045	. . . . 5 |- ( ( 0 e. RR* /\ 0 =/= +oo ) -> ( -oo +e 0 ) = -oo )
19	8, 17, 18	mp2an 426	. . . 4 |- ( -oo +e 0 ) = -oo
20		oveq1 6008	. . . 4 |- ( A = -oo -> ( A +e 0 ) = ( -oo +e 0 ) )
21		id 19	. . . 4 |- ( A = -oo -> A = -oo )
22	19, 20, 21	3eqtr4a 2288	. . 3 |- ( A = -oo -> ( A +e 0 ) = A )
23	7, 15, 22	3jaoi 1337	. 2 |- ( ( A e. RR \/ A = +oo \/ A = -oo ) -> ( A +e 0 ) = A )
24	1, 23	sylbi 121	1 |- ( A e. RR* -> ( A +e 0 ) = A )

Syntax hints:   -> wi 4   \/ w3o 1001   = wceq 1395   e. wcel 2200   =/= wne 2400  (class class class)co 6001   RRcr 7998   0cc0 7999   + caddc 8002   +oocpnf 8178   -oocmnf 8179   RR*cxr 8180   +ecxad 9966

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 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-sep 4202  ax-pow 4258  ax-pr 4293  ax-un 4524  ax-setind 4629  ax-cnex 8090  ax-resscn 8091  ax-1re 8093  ax-addrcl 8096  ax-0id 8107  ax-rnegex 8108

This theorem depends on definitions:  df-bi 117  df-dc 840  df-3or 1003  df-3an 1004  df-tru 1398  df-fal 1401  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-nel 2496  df-ral 2513  df-rex 2514  df-rab 2517  df-v 2801  df-sbc 3029  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-if 3603  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-br 4084  df-opab 4146  df-id 4384  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-iota 5278  df-fun 5320  df-fv 5326  df-ov 6004  df-oprab 6005  df-mpo 6006  df-pnf 8183  df-mnf 8184  df-xr 8185  df-xadd 9969

This theorem is referenced by:  xaddid2  10059  xaddid1d  10060  xnn0xadd0  10063  xpncan  10067  psmetsym  15003  psmetge0  15005  xmetge0  15039  xmetsym  15042