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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 8236 | . 2 ⊢ (𝐴 ∈ ℝ → ∃𝑥 ∈ ℝ (𝐴 + 𝑥) = 0) | |
| 2 | recn 8260 | . . . . 5 ⊢ (𝑥 ∈ ℝ → 𝑥 ∈ ℂ) | |
| 3 | df-neg 8447 | . . . . . . 7 ⊢ -𝐴 = (0 − 𝐴) | |
| 4 | 3 | eqeq1i 2240 | . . . . . 6 ⊢ (-𝐴 = 𝑥 ↔ (0 − 𝐴) = 𝑥) |
| 5 | recn 8260 | . . . . . . 7 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℂ) | |
| 6 | 0cn 8266 | . . . . . . . 8 ⊢ 0 ∈ ℂ | |
| 7 | subadd 8476 | . . . . . . . 8 ⊢ ((0 ∈ ℂ ∧ 𝐴 ∈ ℂ ∧ 𝑥 ∈ ℂ) → ((0 − 𝐴) = 𝑥 ↔ (𝐴 + 𝑥) = 0)) | |
| 8 | 6, 7 | mp3an1 1361 | . . . . . . 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 2304 | . . . . 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 2660 | . 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 1398 ∈ wcel 2203 ∃wrex 2521 (class class class)co 6050 ℂcc 8125 ℝcr 8126 0cc0 8127 + caddc 8130 − cmin 8444 -cneg 8445 |
| 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 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-14 2206 ax-ext 2214 ax-sep 4228 ax-pow 4287 ax-pr 4322 ax-setind 4659 ax-resscn 8219 ax-1cn 8220 ax-icn 8222 ax-addcl 8223 ax-addrcl 8224 ax-mulcl 8225 ax-addcom 8227 ax-addass 8229 ax-distr 8231 ax-i2m1 8232 ax-0id 8235 ax-rnegex 8236 ax-cnre 8238 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ne 2413 df-ral 2525 df-rex 2526 df-reu 2527 df-rab 2529 df-v 2815 df-sbc 3043 df-dif 3213 df-un 3215 df-in 3217 df-ss 3224 df-pw 3671 df-sn 3695 df-pr 3696 df-op 3698 df-uni 3915 df-br 4110 df-opab 4172 df-id 4414 df-xp 4755 df-rel 4756 df-cnv 4757 df-co 4758 df-dm 4759 df-iota 5312 df-fun 5354 df-fv 5360 df-riota 6003 df-ov 6053 df-oprab 6054 df-mpo 6055 df-sub 8446 df-neg 8447 |
| This theorem is referenced by: renegcli 8535 resubcl 8537 negreb 8538 renegcld 8653 negf1o 8655 ltnegcon1 8737 ltnegcon2 8738 lenegcon1 8740 lenegcon2 8741 mullt0 8754 recexre 8852 elnnz 9587 btwnz 9697 supinfneg 9927 infsupneg 9928 supminfex 9929 ublbneg 9945 negm 9947 rpnegap 10019 negelrp 10020 xnegcl 10165 xnegneg 10166 xltnegi 10168 rexsub 10186 xnegid 10192 xnegdi 10201 xpncan 10204 xnpcan 10205 xposdif 10215 iooneg 10321 iccneg 10322 icoshftf1o 10324 infssuzex 10593 crim 11543 absnid 11758 absdiflt 11777 absdifle 11778 dfabsmax 11902 max0addsup 11904 negfi 11913 minmax 11915 mincl 11916 min1inf 11917 min2inf 11918 minabs 11921 minclpr 11922 mingeb 11927 xrminrecl 11958 xrminrpcl 11959 |
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