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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 8007 | . 2 ⊢ (𝐴 ∈ ℝ → ∃𝑥 ∈ ℝ (𝐴 + 𝑥) = 0) | |
| 2 | recn 8031 | . . . . 5 ⊢ (𝑥 ∈ ℝ → 𝑥 ∈ ℂ) | |
| 3 | df-neg 8219 | . . . . . . 7 ⊢ -𝐴 = (0 − 𝐴) | |
| 4 | 3 | eqeq1i 2204 | . . . . . 6 ⊢ (-𝐴 = 𝑥 ↔ (0 − 𝐴) = 𝑥) |
| 5 | recn 8031 | . . . . . . 7 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℂ) | |
| 6 | 0cn 8037 | . . . . . . . 8 ⊢ 0 ∈ ℂ | |
| 7 | subadd 8248 | . . . . . . . 8 ⊢ ((0 ∈ ℂ ∧ 𝐴 ∈ ℂ ∧ 𝑥 ∈ ℂ) → ((0 − 𝐴) = 𝑥 ↔ (𝐴 + 𝑥) = 0)) | |
| 8 | 6, 7 | mp3an1 1335 | . . . . . . 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 2268 | . . . . 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 2614 | . 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 1364 ∈ wcel 2167 ∃wrex 2476 (class class class)co 5925 ℂcc 7896 ℝcr 7897 0cc0 7898 + caddc 7901 − cmin 8216 -cneg 8217 |
| 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 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-14 2170 ax-ext 2178 ax-sep 4152 ax-pow 4208 ax-pr 4243 ax-setind 4574 ax-resscn 7990 ax-1cn 7991 ax-icn 7993 ax-addcl 7994 ax-addrcl 7995 ax-mulcl 7996 ax-addcom 7998 ax-addass 8000 ax-distr 8002 ax-i2m1 8003 ax-0id 8006 ax-rnegex 8007 ax-cnre 8009 |
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ne 2368 df-ral 2480 df-rex 2481 df-reu 2482 df-rab 2484 df-v 2765 df-sbc 2990 df-dif 3159 df-un 3161 df-in 3163 df-ss 3170 df-pw 3608 df-sn 3629 df-pr 3630 df-op 3632 df-uni 3841 df-br 4035 df-opab 4096 df-id 4329 df-xp 4670 df-rel 4671 df-cnv 4672 df-co 4673 df-dm 4674 df-iota 5220 df-fun 5261 df-fv 5267 df-riota 5880 df-ov 5928 df-oprab 5929 df-mpo 5930 df-sub 8218 df-neg 8219 |
| This theorem is referenced by: renegcli 8307 resubcl 8309 negreb 8310 renegcld 8425 negf1o 8427 ltnegcon1 8509 ltnegcon2 8510 lenegcon1 8512 lenegcon2 8513 mullt0 8526 recexre 8624 elnnz 9355 btwnz 9464 supinfneg 9688 infsupneg 9689 supminfex 9690 ublbneg 9706 negm 9708 rpnegap 9780 negelrp 9781 xnegcl 9926 xnegneg 9927 xltnegi 9929 rexsub 9947 xnegid 9953 xnegdi 9962 xpncan 9965 xnpcan 9966 xposdif 9976 iooneg 10082 iccneg 10083 icoshftf1o 10085 infssuzex 10342 crim 11042 absnid 11257 absdiflt 11276 absdifle 11277 dfabsmax 11401 max0addsup 11403 negfi 11412 minmax 11414 mincl 11415 min1inf 11416 min2inf 11417 minabs 11420 minclpr 11421 mingeb 11426 xrminrecl 11457 xrminrpcl 11458 |
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