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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 2676 | . 2 ⊢ (𝐴 = if(𝐴 ∈ 𝐶, 𝐴, 𝐵) → (𝐴 ∈ 𝐶 ↔ if(𝐴 ∈ 𝐶, 𝐴, 𝐵) ∈ 𝐶)) | |
2 | eleq1 2676 | . 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 4096 | 1 ⊢ if(𝐴 ∈ 𝐶, 𝐴, 𝐵) ∈ 𝐶 |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 1977 ifcif 4036 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-clab 2597 df-cleq 2603 df-clel 2606 df-if 4037 |
This theorem is referenced by: fprg 6327 orduninsuc 6935 oawordeu 7522 oeoa 7564 omopth 7625 unfilem3 8111 inar1 9476 supsr 9812 renegcl 10223 peano5uzti 11343 eluzadd 11592 eluzsub 11593 ltweuz 12622 uzenom 12625 seqfn 12675 seq1 12676 seqp1 12678 sqeqor 12840 binom2 12841 nn0opth2 12921 faclbnd4lem2 12943 hashxp 13081 dvdsle 14870 divalglem7 14960 divalg 14964 gcdaddm 15084 smadiadetr 20300 iblcnlem 23361 ax5seglem8 25616 elimnv 26922 elimnvu 26923 nmlno0i 27033 nmblolbi 27039 blocn 27046 elimphu 27060 ubth 27113 htth 27159 ifhvhv0 27263 normlem6 27356 norm-iii 27381 norm3lemt 27393 ifchhv 27485 hhssablo 27504 hhssnvt 27506 shscl 27561 shslej 27623 shincl 27624 omlsii 27646 pjoml 27679 pjoc2 27682 chm0 27734 chne0 27737 chocin 27738 chj0 27740 chlejb1 27755 chnle 27757 ledi 27783 h1datom 27825 cmbr3 27851 pjoml2 27854 cmcm 27857 cmcm3 27858 lecm 27860 pjmuli 27932 pjige0 27934 pjhfo 27949 pj11 27957 eigre 28078 eigorth 28081 hoddi 28233 nmlnop0 28241 lnopeq 28252 lnopunilem2 28254 nmbdoplb 28268 nmcopex 28272 nmcoplb 28273 lnopcon 28278 lnfn0 28290 lnfnmul 28291 nmcfnex 28296 nmcfnlb 28297 lnfncon 28299 riesz4 28307 riesz1 28308 cnlnadjeu 28321 pjhmop 28393 pjidmco 28424 mdslmd1lem3 28570 mdslmd1lem4 28571 csmdsymi 28577 hatomic 28603 atord 28631 atcvat2 28632 bnj941 30097 bnj944 30262 kur14 30452 abs2sqle 30828 abs2sqlt 30829 onsuccon 31607 onsucsuccmp 31613 sdclem1 32709 bnd2d 42226 |
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