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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 8141 | . 2 ⊢ (𝐴 ∈ ℝ → ∃𝑥 ∈ ℝ (𝐴 + 𝑥) = 0) | |
| 2 | recn 8165 | . . . . 5 ⊢ (𝑥 ∈ ℝ → 𝑥 ∈ ℂ) | |
| 3 | df-neg 8353 | . . . . . . 7 ⊢ -𝐴 = (0 − 𝐴) | |
| 4 | 3 | eqeq1i 2239 | . . . . . 6 ⊢ (-𝐴 = 𝑥 ↔ (0 − 𝐴) = 𝑥) |
| 5 | recn 8165 | . . . . . . 7 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℂ) | |
| 6 | 0cn 8171 | . . . . . . . 8 ⊢ 0 ∈ ℂ | |
| 7 | subadd 8382 | . . . . . . . 8 ⊢ ((0 ∈ ℂ ∧ 𝐴 ∈ ℂ ∧ 𝑥 ∈ ℂ) → ((0 − 𝐴) = 𝑥 ↔ (𝐴 + 𝑥) = 0)) | |
| 8 | 6, 7 | mp3an1 1360 | . . . . . . 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 2303 | . . . . 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 2650 | . 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 1397 ∈ wcel 2202 ∃wrex 2511 (class class class)co 6018 ℂcc 8030 ℝcr 8031 0cc0 8032 + caddc 8035 − cmin 8350 -cneg 8351 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-setind 4635 ax-resscn 8124 ax-1cn 8125 ax-icn 8127 ax-addcl 8128 ax-addrcl 8129 ax-mulcl 8130 ax-addcom 8132 ax-addass 8134 ax-distr 8136 ax-i2m1 8137 ax-0id 8140 ax-rnegex 8141 ax-cnre 8143 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-ral 2515 df-rex 2516 df-reu 2517 df-rab 2519 df-v 2804 df-sbc 3032 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-opab 4151 df-id 4390 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-iota 5286 df-fun 5328 df-fv 5334 df-riota 5971 df-ov 6021 df-oprab 6022 df-mpo 6023 df-sub 8352 df-neg 8353 |
| This theorem is referenced by: renegcli 8441 resubcl 8443 negreb 8444 renegcld 8559 negf1o 8561 ltnegcon1 8643 ltnegcon2 8644 lenegcon1 8646 lenegcon2 8647 mullt0 8660 recexre 8758 elnnz 9489 btwnz 9599 supinfneg 9829 infsupneg 9830 supminfex 9831 ublbneg 9847 negm 9849 rpnegap 9921 negelrp 9922 xnegcl 10067 xnegneg 10068 xltnegi 10070 rexsub 10088 xnegid 10094 xnegdi 10103 xpncan 10106 xnpcan 10107 xposdif 10117 iooneg 10223 iccneg 10224 icoshftf1o 10226 infssuzex 10494 crim 11423 absnid 11638 absdiflt 11657 absdifle 11658 dfabsmax 11782 max0addsup 11784 negfi 11793 minmax 11795 mincl 11796 min1inf 11797 min2inf 11798 minabs 11801 minclpr 11802 mingeb 11807 xrminrecl 11838 xrminrpcl 11839 |
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