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| Mirrors > Home > MPE Home > Th. List > abid | Structured version Visualization version GIF version | ||
| Description: Simplification of class abstraction notation when the free and bound variables are identical. (Contributed by NM, 26-May-1993.) |
| Ref | Expression |
|---|---|
| abid | ⊢ (𝑥 ∈ {𝑥 ∣ 𝜑} ↔ 𝜑) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-clab 2745 | . 2 ⊢ (𝑥 ∈ {𝑥 ∣ 𝜑} ↔ [𝑥 / 𝑥]𝜑) | |
| 2 | sbid 2294 | . 2 ⊢ ([𝑥 / 𝑥]𝜑 ↔ 𝜑) | |
| 3 | 1, 2 | bitri 278 | 1 ⊢ (𝑥 ∈ {𝑥 ∣ 𝜑} ↔ 𝜑) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 [wsb 2099 ∈ wcel 2146 {cab 2744 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-12 2216 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-sb 2100 df-clab 2745 |
| This theorem is used by: eqabrd 2907 eqabf 2957 abid2fOLD 2959 elabgf 3636 ralab2 3663 rexab2 3665 ss2ab 4018 ab0ALT 4340 sbccsb 4404 sbccsb2 4405 eluniab 4891 iunab 5021 iinab 5037 zfrep4 5259 rnep 5922 sniota 6534 opabiota 6970 eusvobj2 7415 eloprabga 7532 finds2 7904 frrlem10 8301 en3lplem2 9592 scottabf 9878 scottexsOLD 9882 scott0bsOLD 9884 cp 9893 cardprclem 9984 cfflb 10261 fin23lem29 10343 axdc3lem2 10453 4sqlem12 17041 xkococn 23854 ptcmplem4 24249 noinfbnd1lem1 27924 ofpreima 33047 algextdeglem6 34143 qqhval2 34403 esum2dlem 34513 sigaclcu2 34541 bnj1143 35210 bnj1366 35249 bnj906 35350 bnj1256 35435 bnj1259 35436 bnj1311 35444 mclsax 36082 ellines 36665 bj-csbsnlem 37579 bj-reabeq 37704 bj-velpwALT 37730 topdifinffinlem 38034 rdgssun 38065 finxpreclem6 38083 finxpnom 38088 ralssiun 38094 setindtrs 43793 rababg 44341 compab 45192 tpid3gVD 45591 en3lplem2VD 45593 permaxrep 45756 iunmapsn 45974 ssfiunibd 46069 absnsb 47805 setrec2lem2 50513 |
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