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Mirrors > Home > MPE Home > Th. List > elimel | Structured version Visualization version GIF version |
Description: Eliminate a membership hypothesis for weak deduction theorem, when special case 𝐵 ∈ 𝐶 is provable. (Contributed by NM, 15-May-1999.) |
Ref | Expression |
---|---|
elimel.1 | ⊢ 𝐵 ∈ 𝐶 |
Ref | Expression |
---|---|
elimel | ⊢ if(𝐴 ∈ 𝐶, 𝐴, 𝐵) ∈ 𝐶 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eleq1 2689 | . 2 ⊢ (𝐴 = if(𝐴 ∈ 𝐶, 𝐴, 𝐵) → (𝐴 ∈ 𝐶 ↔ if(𝐴 ∈ 𝐶, 𝐴, 𝐵) ∈ 𝐶)) | |
2 | eleq1 2689 | . 2 ⊢ (𝐵 = if(𝐴 ∈ 𝐶, 𝐴, 𝐵) → (𝐵 ∈ 𝐶 ↔ if(𝐴 ∈ 𝐶, 𝐴, 𝐵) ∈ 𝐶)) | |
3 | elimel.1 | . 2 ⊢ 𝐵 ∈ 𝐶 | |
4 | 1, 2, 3 | elimhyp 4146 | 1 ⊢ if(𝐴 ∈ 𝐶, 𝐴, 𝐵) ∈ 𝐶 |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 1990 ifcif 4086 |
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-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-clab 2609 df-cleq 2615 df-clel 2618 df-if 4087 |
This theorem is referenced by: fprg 6422 orduninsuc 7043 oawordeu 7635 oeoa 7677 omopth 7738 unfilem3 8226 inar1 9597 supsr 9933 renegcl 10344 peano5uzti 11467 eluzadd 11716 eluzsub 11717 ltweuz 12760 uzenom 12763 seqfn 12813 seq1 12814 seqp1 12816 sqeqor 12978 binom2 12979 nn0opth2 13059 faclbnd4lem2 13081 hashxp 13221 dvdsle 15032 divalglem7 15122 divalg 15126 gcdaddm 15246 smadiadetr 20481 iblcnlem 23555 ax5seglem8 25816 elimnv 27538 elimnvu 27539 nmlno0i 27649 nmblolbi 27655 blocn 27662 elimphu 27676 ubth 27729 htth 27775 ifhvhv0 27879 normlem6 27972 norm-iii 27997 norm3lemt 28009 ifchhv 28101 hhssablo 28120 hhssnvt 28122 shscl 28177 shslej 28239 shincl 28240 omlsii 28262 pjoml 28295 pjoc2 28298 chm0 28350 chne0 28353 chocin 28354 chj0 28356 chlejb1 28371 chnle 28373 ledi 28399 h1datom 28441 cmbr3 28467 pjoml2 28470 cmcm 28473 cmcm3 28474 lecm 28476 pjmuli 28548 pjige0 28550 pjhfo 28565 pj11 28573 eigre 28694 eigorth 28697 hoddi 28849 nmlnop0 28857 lnopeq 28868 lnopunilem2 28870 nmbdoplb 28884 nmcopex 28888 nmcoplb 28889 lnopcon 28894 lnfn0 28906 lnfnmul 28907 nmcfnex 28912 nmcfnlb 28913 lnfncon 28915 riesz4 28923 riesz1 28924 cnlnadjeu 28937 pjhmop 29009 pjidmco 29040 mdslmd1lem3 29186 mdslmd1lem4 29187 csmdsymi 29193 hatomic 29219 atord 29247 atcvat2 29248 bnj941 30843 bnj944 31008 kur14 31198 abs2sqle 31574 abs2sqlt 31575 onsucconn 32437 onsucsuccmp 32443 sdclem1 33539 bnd2d 42428 |
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