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Mirrors > Home > ILE Home > Th. List > negeu | Unicode version |
Description: Existential uniqueness of negatives. Theorem I.2 of [Apostol] p. 18. (Contributed by NM, 22-Nov-1994.) (Proof shortened by Mario Carneiro, 27-May-2016.) |
Ref | Expression |
---|---|
negeu |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cnegex 7940 | . . 3 | |
2 | 1 | adantr 274 | . 2 |
3 | simpl 108 | . . . 4 | |
4 | simpr 109 | . . . 4 | |
5 | addcl 7745 | . . . 4 | |
6 | 3, 4, 5 | syl2anr 288 | . . 3 |
7 | simplrr 525 | . . . . . . . 8 | |
8 | 7 | oveq1d 5789 | . . . . . . 7 |
9 | simplll 522 | . . . . . . . 8 | |
10 | simplrl 524 | . . . . . . . 8 | |
11 | simpllr 523 | . . . . . . . 8 | |
12 | 9, 10, 11 | addassd 7788 | . . . . . . 7 |
13 | 11 | addid2d 7912 | . . . . . . 7 |
14 | 8, 12, 13 | 3eqtr3rd 2181 | . . . . . 6 |
15 | 14 | eqeq2d 2151 | . . . . 5 |
16 | simpr 109 | . . . . . 6 | |
17 | 10, 11 | addcld 7785 | . . . . . 6 |
18 | 9, 16, 17 | addcand 7946 | . . . . 5 |
19 | 15, 18 | bitrd 187 | . . . 4 |
20 | 19 | ralrimiva 2505 | . . 3 |
21 | reu6i 2875 | . . 3 | |
22 | 6, 20, 21 | syl2anc 408 | . 2 |
23 | 2, 22 | rexlimddv 2554 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wb 104 wceq 1331 wcel 1480 wral 2416 wrex 2417 wreu 2418 (class class class)co 5774 cc 7618 cc0 7620 caddc 7623 |
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-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-resscn 7712 ax-1cn 7713 ax-icn 7715 ax-addcl 7716 ax-addrcl 7717 ax-mulcl 7718 ax-addcom 7720 ax-addass 7722 ax-distr 7724 ax-i2m1 7725 ax-0id 7728 ax-rnegex 7729 ax-cnre 7731 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-eu 2002 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ral 2421 df-rex 2422 df-reu 2423 df-v 2688 df-un 3075 df-in 3077 df-ss 3084 df-sn 3533 df-pr 3534 df-op 3536 df-uni 3737 df-br 3930 df-iota 5088 df-fv 5131 df-ov 5777 |
This theorem is referenced by: subval 7954 subcl 7961 subadd 7965 |
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