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| Mirrors > Home > ILE Home > Th. List > renegcl | GIF version | ||
| Description: Closure law for negative of reals. (Contributed by NM, 20-Jan-1997.) |
| Ref | Expression |
|---|---|
| renegcl | ⊢ (𝐴 ∈ ℝ → -𝐴 ∈ ℝ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-rnegex 8104 | . 2 ⊢ (𝐴 ∈ ℝ → ∃𝑥 ∈ ℝ (𝐴 + 𝑥) = 0) | |
| 2 | recn 8128 | . . . . 5 ⊢ (𝑥 ∈ ℝ → 𝑥 ∈ ℂ) | |
| 3 | df-neg 8316 | . . . . . . 7 ⊢ -𝐴 = (0 − 𝐴) | |
| 4 | 3 | eqeq1i 2237 | . . . . . 6 ⊢ (-𝐴 = 𝑥 ↔ (0 − 𝐴) = 𝑥) |
| 5 | recn 8128 | . . . . . . 7 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℂ) | |
| 6 | 0cn 8134 | . . . . . . . 8 ⊢ 0 ∈ ℂ | |
| 7 | subadd 8345 | . . . . . . . 8 ⊢ ((0 ∈ ℂ ∧ 𝐴 ∈ ℂ ∧ 𝑥 ∈ ℂ) → ((0 − 𝐴) = 𝑥 ↔ (𝐴 + 𝑥) = 0)) | |
| 8 | 6, 7 | mp3an1 1358 | . . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝑥 ∈ ℂ) → ((0 − 𝐴) = 𝑥 ↔ (𝐴 + 𝑥) = 0)) |
| 9 | 5, 8 | sylan 283 | . . . . . 6 ⊢ ((𝐴 ∈ ℝ ∧ 𝑥 ∈ ℂ) → ((0 − 𝐴) = 𝑥 ↔ (𝐴 + 𝑥) = 0)) |
| 10 | 4, 9 | bitrid 192 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 𝑥 ∈ ℂ) → (-𝐴 = 𝑥 ↔ (𝐴 + 𝑥) = 0)) |
| 11 | 2, 10 | sylan2 286 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝑥 ∈ ℝ) → (-𝐴 = 𝑥 ↔ (𝐴 + 𝑥) = 0)) |
| 12 | eleq1a 2301 | . . . . 5 ⊢ (𝑥 ∈ ℝ → (-𝐴 = 𝑥 → -𝐴 ∈ ℝ)) | |
| 13 | 12 | adantl 277 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝑥 ∈ ℝ) → (-𝐴 = 𝑥 → -𝐴 ∈ ℝ)) |
| 14 | 11, 13 | sylbird 170 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝑥 ∈ ℝ) → ((𝐴 + 𝑥) = 0 → -𝐴 ∈ ℝ)) |
| 15 | 14 | rexlimdva 2648 | . 2 ⊢ (𝐴 ∈ ℝ → (∃𝑥 ∈ ℝ (𝐴 + 𝑥) = 0 → -𝐴 ∈ ℝ)) |
| 16 | 1, 15 | mpd 13 | 1 ⊢ (𝐴 ∈ ℝ → -𝐴 ∈ ℝ) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1395 ∈ wcel 2200 ∃wrex 2509 (class class class)co 6000 ℂcc 7993 ℝcr 7994 0cc0 7995 + caddc 7998 − cmin 8313 -cneg 8314 |
| 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-14 2203 ax-ext 2211 ax-sep 4201 ax-pow 4257 ax-pr 4292 ax-setind 4628 ax-resscn 8087 ax-1cn 8088 ax-icn 8090 ax-addcl 8091 ax-addrcl 8092 ax-mulcl 8093 ax-addcom 8095 ax-addass 8097 ax-distr 8099 ax-i2m1 8100 ax-0id 8103 ax-rnegex 8104 ax-cnre 8106 |
| This theorem depends on definitions: df-bi 117 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-ral 2513 df-rex 2514 df-reu 2515 df-rab 2517 df-v 2801 df-sbc 3029 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3888 df-br 4083 df-opab 4145 df-id 4383 df-xp 4724 df-rel 4725 df-cnv 4726 df-co 4727 df-dm 4728 df-iota 5277 df-fun 5319 df-fv 5325 df-riota 5953 df-ov 6003 df-oprab 6004 df-mpo 6005 df-sub 8315 df-neg 8316 |
| This theorem is referenced by: renegcli 8404 resubcl 8406 negreb 8407 renegcld 8522 negf1o 8524 ltnegcon1 8606 ltnegcon2 8607 lenegcon1 8609 lenegcon2 8610 mullt0 8623 recexre 8721 elnnz 9452 btwnz 9562 supinfneg 9786 infsupneg 9787 supminfex 9788 ublbneg 9804 negm 9806 rpnegap 9878 negelrp 9879 xnegcl 10024 xnegneg 10025 xltnegi 10027 rexsub 10045 xnegid 10051 xnegdi 10060 xpncan 10063 xnpcan 10064 xposdif 10074 iooneg 10180 iccneg 10181 icoshftf1o 10183 infssuzex 10448 crim 11364 absnid 11579 absdiflt 11598 absdifle 11599 dfabsmax 11723 max0addsup 11725 negfi 11734 minmax 11736 mincl 11737 min1inf 11738 min2inf 11739 minabs 11742 minclpr 11743 mingeb 11748 xrminrecl 11779 xrminrpcl 11780 |
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