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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 4139 is used to convert hypothesis of the inference (deduction) form of this theorem, renegcli 10342, 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 10273 | . . 3 ⊢ (𝐴 = if(𝐴 ∈ ℝ, 𝐴, 1) → -𝐴 = -if(𝐴 ∈ ℝ, 𝐴, 1)) | |
2 | 1 | eleq1d 2686 | . 2 ⊢ (𝐴 = if(𝐴 ∈ ℝ, 𝐴, 1) → (-𝐴 ∈ ℝ ↔ -if(𝐴 ∈ ℝ, 𝐴, 1) ∈ ℝ)) |
3 | 1re 10039 | . . . 4 ⊢ 1 ∈ ℝ | |
4 | 3 | elimel 4150 | . . 3 ⊢ if(𝐴 ∈ ℝ, 𝐴, 1) ∈ ℝ |
5 | 4 | renegcli 10342 | . 2 ⊢ -if(𝐴 ∈ ℝ, 𝐴, 1) ∈ ℝ |
6 | 2, 5 | dedth 4139 | 1 ⊢ (𝐴 ∈ ℝ → -𝐴 ∈ ℝ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1483 ∈ wcel 1990 ifcif 4086 ℝcr 9935 1c1 9937 -cneg 10267 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 ax-resscn 9993 ax-1cn 9994 ax-icn 9995 ax-addcl 9996 ax-addrcl 9997 ax-mulcl 9998 ax-mulrcl 9999 ax-mulcom 10000 ax-addass 10001 ax-mulass 10002 ax-distr 10003 ax-i2m1 10004 ax-1ne0 10005 ax-1rid 10006 ax-rnegex 10007 ax-rrecex 10008 ax-cnre 10009 ax-pre-lttri 10010 ax-pre-lttrn 10011 ax-pre-ltadd 10012 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-nel 2898 df-ral 2917 df-rex 2918 df-reu 2919 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-br 4654 df-opab 4713 df-mpt 4730 df-id 5024 df-po 5035 df-so 5036 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-riota 6611 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-er 7742 df-en 7956 df-dom 7957 df-sdom 7958 df-pnf 10076 df-mnf 10077 df-ltxr 10079 df-sub 10268 df-neg 10269 |
This theorem is referenced by: resubcl 10345 negreb 10346 renegcld 10457 negn0 10459 negf1o 10460 ltnegcon1 10529 ltnegcon2 10530 lenegcon1 10532 lenegcon2 10533 mullt0 10547 mulge0b 10893 mulle0b 10894 negfi 10971 fiminre 10972 infm3lem 10981 infm3 10982 riotaneg 11002 elnnz 11387 btwnz 11479 ublbneg 11773 supminf 11775 uzwo3 11783 zmax 11785 rebtwnz 11787 rpneg 11863 negelrp 11864 max0sub 12027 xnegcl 12044 xnegneg 12045 xltnegi 12047 rexsub 12064 xnegid 12069 xnegdi 12078 xpncan 12081 xnpcan 12082 xadddi 12125 iooneg 12292 iccneg 12293 icoshftf1o 12295 dfceil2 12640 ceicl 12642 ceige 12644 ceim1l 12646 negmod0 12677 negmod 12715 addmodlteq 12745 crim 13855 cnpart 13980 sqrtneglem 14007 absnid 14038 max0add 14050 absdiflt 14057 absdifle 14058 sqreulem 14099 resinhcl 14886 rpcoshcl 14887 tanhlt1 14890 tanhbnd 14891 remulg 19953 resubdrg 19954 cnheiborlem 22753 evth2 22759 ismbf3d 23421 mbfinf 23432 itgconst 23585 reeff1o 24201 atanbnd 24653 sgnneg 30602 ltflcei 33397 cos2h 33400 iblabsnclem 33473 ftc1anclem1 33485 areacirclem2 33501 areacirclem3 33502 areacirc 33505 mulltgt0 39181 rexabslelem 39645 xnegrecl 39665 supminfrnmpt 39672 supminfxr 39694 limsupre 39873 climinf3 39948 liminfreuzlem 40034 stoweidlem10 40227 etransclem46 40497 smfinflem 41023 |
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