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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 4525 is used to convert hypothesis of the inference (deduction) form of this theorem, renegcli 10949, 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 10880 | . . 3 ⊢ (𝐴 = if(𝐴 ∈ ℝ, 𝐴, 1) → -𝐴 = -if(𝐴 ∈ ℝ, 𝐴, 1)) | |
2 | 1 | eleq1d 2899 | . 2 ⊢ (𝐴 = if(𝐴 ∈ ℝ, 𝐴, 1) → (-𝐴 ∈ ℝ ↔ -if(𝐴 ∈ ℝ, 𝐴, 1) ∈ ℝ)) |
3 | 1re 10643 | . . . 4 ⊢ 1 ∈ ℝ | |
4 | 3 | elimel 4536 | . . 3 ⊢ if(𝐴 ∈ ℝ, 𝐴, 1) ∈ ℝ |
5 | 4 | renegcli 10949 | . 2 ⊢ -if(𝐴 ∈ ℝ, 𝐴, 1) ∈ ℝ |
6 | 2, 5 | dedth 4525 | 1 ⊢ (𝐴 ∈ ℝ → -𝐴 ∈ ℝ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1537 ∈ wcel 2114 ifcif 4469 ℝcr 10538 1c1 10540 -cneg 10873 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-resscn 10596 ax-1cn 10597 ax-icn 10598 ax-addcl 10599 ax-addrcl 10600 ax-mulcl 10601 ax-mulrcl 10602 ax-mulcom 10603 ax-addass 10604 ax-mulass 10605 ax-distr 10606 ax-i2m1 10607 ax-1ne0 10608 ax-1rid 10609 ax-rnegex 10610 ax-rrecex 10611 ax-cnre 10612 ax-pre-lttri 10613 ax-pre-lttrn 10614 ax-pre-ltadd 10615 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-nel 3126 df-ral 3145 df-rex 3146 df-reu 3147 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-op 4576 df-uni 4841 df-br 5069 df-opab 5131 df-mpt 5149 df-id 5462 df-po 5476 df-so 5477 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-fv 6365 df-riota 7116 df-ov 7161 df-oprab 7162 df-mpo 7163 df-er 8291 df-en 8512 df-dom 8513 df-sdom 8514 df-pnf 10679 df-mnf 10680 df-ltxr 10682 df-sub 10874 df-neg 10875 |
This theorem is referenced by: resubcl 10952 negreb 10953 renegcld 11069 negn0 11071 negf1o 11072 ltnegcon1 11143 ltnegcon2 11144 lenegcon1 11146 lenegcon2 11147 mullt0 11161 mulge0b 11512 mulle0b 11513 negfi 11591 fiminreOLD 11592 infm3lem 11601 infm3 11602 riotaneg 11622 elnnz 11994 btwnz 12087 ublbneg 12336 supminf 12338 uzwo3 12346 zmax 12348 rebtwnz 12350 rpneg 12424 negelrp 12425 max0sub 12592 xnegcl 12609 xnegneg 12610 xltnegi 12612 rexsub 12629 xnegid 12634 xnegdi 12644 xpncan 12647 xnpcan 12648 xadddi 12691 iooneg 12860 iccneg 12861 icoshftf1o 12863 dfceil2 13212 ceicl 13214 ceige 13216 ceim1l 13218 negmod0 13249 negmod 13287 addmodlteq 13317 crim 14476 cnpart 14601 sqrtneglem 14628 absnid 14660 max0add 14672 absdiflt 14679 absdifle 14680 sqreulem 14721 resinhcl 15511 rpcoshcl 15512 tanhlt1 15515 tanhbnd 15516 remulg 20753 resubdrg 20754 cnheiborlem 23560 evth2 23566 ismbf3d 24257 mbfinf 24268 itgconst 24421 reeff1o 25037 atanbnd 25506 sgnneg 31800 ltflcei 34882 cos2h 34885 iblabsnclem 34957 ftc1anclem1 34969 areacirclem2 34985 areacirclem3 34986 areacirc 34989 mulltgt0 41286 rexabslelem 41699 xnegrecl 41719 supminfrnmpt 41726 supminfxr 41747 limsupre 41929 climinf3 42004 liminfreuzlem 42090 stoweidlem10 42302 etransclem46 42572 smfinflem 43098 line2 44746 |
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