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Mirrors > Home > MPE Home > Th. List > renegcl | Structured version Visualization version GIF version |
Description: Closure law for negative of reals. The weak deduction theorem dedth 4481 is used to convert hypothesis of the inference (deduction) form of this theorem, renegcli 10936, to an antecedent. (Contributed by NM, 20-Jan-1997.) (Proof modification is discouraged.) |
Ref | Expression |
---|---|
renegcl | ⊢ (𝐴 ∈ ℝ → -𝐴 ∈ ℝ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | negeq 10867 | . . 3 ⊢ (𝐴 = if(𝐴 ∈ ℝ, 𝐴, 1) → -𝐴 = -if(𝐴 ∈ ℝ, 𝐴, 1)) | |
2 | 1 | eleq1d 2874 | . 2 ⊢ (𝐴 = if(𝐴 ∈ ℝ, 𝐴, 1) → (-𝐴 ∈ ℝ ↔ -if(𝐴 ∈ ℝ, 𝐴, 1) ∈ ℝ)) |
3 | 1re 10630 | . . . 4 ⊢ 1 ∈ ℝ | |
4 | 3 | elimel 4492 | . . 3 ⊢ if(𝐴 ∈ ℝ, 𝐴, 1) ∈ ℝ |
5 | 4 | renegcli 10936 | . 2 ⊢ -if(𝐴 ∈ ℝ, 𝐴, 1) ∈ ℝ |
6 | 2, 5 | dedth 4481 | 1 ⊢ (𝐴 ∈ ℝ → -𝐴 ∈ ℝ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1538 ∈ wcel 2111 ifcif 4425 ℝcr 10525 1c1 10527 -cneg 10860 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 ax-un 7441 ax-resscn 10583 ax-1cn 10584 ax-icn 10585 ax-addcl 10586 ax-addrcl 10587 ax-mulcl 10588 ax-mulrcl 10589 ax-mulcom 10590 ax-addass 10591 ax-mulass 10592 ax-distr 10593 ax-i2m1 10594 ax-1ne0 10595 ax-1rid 10596 ax-rnegex 10597 ax-rrecex 10598 ax-cnre 10599 ax-pre-lttri 10600 ax-pre-lttrn 10601 ax-pre-ltadd 10602 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3or 1085 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ne 2988 df-nel 3092 df-ral 3111 df-rex 3112 df-reu 3113 df-rab 3115 df-v 3443 df-sbc 3721 df-csb 3829 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 df-if 4426 df-pw 4499 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4801 df-br 5031 df-opab 5093 df-mpt 5111 df-id 5425 df-po 5438 df-so 5439 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-iota 6283 df-fun 6326 df-fn 6327 df-f 6328 df-f1 6329 df-fo 6330 df-f1o 6331 df-fv 6332 df-riota 7093 df-ov 7138 df-oprab 7139 df-mpo 7140 df-er 8272 df-en 8493 df-dom 8494 df-sdom 8495 df-pnf 10666 df-mnf 10667 df-ltxr 10669 df-sub 10861 df-neg 10862 |
This theorem is referenced by: resubcl 10939 negreb 10940 renegcld 11056 negn0 11058 negf1o 11059 ltnegcon1 11130 ltnegcon2 11131 lenegcon1 11133 lenegcon2 11134 mullt0 11148 mulge0b 11499 mulle0b 11500 negfi 11577 infm3lem 11586 infm3 11587 riotaneg 11607 elnnz 11979 btwnz 12072 ublbneg 12321 supminf 12323 uzwo3 12331 zmax 12333 rebtwnz 12335 rpneg 12409 negelrp 12410 max0sub 12577 xnegcl 12594 xnegneg 12595 xltnegi 12597 rexsub 12614 xnegid 12619 xnegdi 12629 xpncan 12632 xnpcan 12633 xadddi 12676 iooneg 12849 iccneg 12850 icoshftf1o 12852 dfceil2 13204 ceicl 13206 ceige 13208 ceim1l 13210 negmod0 13241 negmod 13279 addmodlteq 13309 crim 14466 cnpart 14591 sqrtneglem 14618 absnid 14650 max0add 14662 absdiflt 14669 absdifle 14670 sqreulem 14711 resinhcl 15501 rpcoshcl 15502 tanhlt1 15505 tanhbnd 15506 remulg 20296 resubdrg 20297 cnheiborlem 23559 evth2 23565 ismbf3d 24258 mbfinf 24269 itgconst 24422 reeff1o 25042 atanbnd 25512 sgnneg 31908 ltflcei 35045 cos2h 35048 iblabsnclem 35120 ftc1anclem1 35130 areacirclem2 35146 areacirclem3 35147 areacirc 35150 mulltgt0 41651 rexabslelem 42055 xnegrecl 42075 supminfrnmpt 42082 supminfxr 42103 limsupre 42283 climinf3 42358 liminfreuzlem 42444 stoweidlem10 42652 etransclem46 42922 smfinflem 43448 line2 45166 |
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