| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 2741 | . 2 ⊢ (𝑥 ∈ {𝑥 ∣ 𝜑} ↔ [𝑥 / 𝑥]𝜑) | |
| 2 | sbid 2292 | . 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 2145 {cab 2740 |
| 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 2215 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-sb 2100 df-clab 2741 |
| This theorem is used by: eqabrd 2903 eqabf 2953 abid2fOLD 2955 elabgf 3631 ralab2 3658 rexab2 3660 ss2ab 4012 ab0ALT 4333 sbccsb 4397 sbccsb2 4398 eluniab 4884 iunab 5014 iinab 5030 zfrep4 5252 rnep 5915 sniota 6528 opabiota 6964 eusvobj2 7409 eloprabga 7526 finds2 7899 frrlem10 8298 en3lplem2 9596 scottabf 9882 scottexsOLD 9886 scott0bsOLD 9888 cp 9897 cardprclem 9988 cfflb 10265 fin23lem29 10347 axdc3lem2 10457 4sqlem12 17054 xkococn 23892 ptcmplem4 24287 noinfbnd1lem1 27967 ofpreima 33146 algextdeglem6 34240 qqhval2 34500 esum2dlem 34610 sigaclcu2 34638 bnj1143 35307 bnj1366 35346 bnj906 35447 bnj1256 35532 bnj1259 35533 bnj1311 35541 mclsax 36156 ellines 36740 bj-csbsnlem 37654 bj-reabeq 37779 bj-velpwALT 37805 topdifinffinlem 38109 rdgssun 38140 finxpreclem6 38158 finxpnom 38163 ralssiun 38169 setindtrs 43874 rababg 44422 compab 45273 tpid3gVD 45672 en3lplem2VD 45674 permaxrep 45837 iunmapsn 46055 ssfiunibd 46150 absnsb 47923 setrec2lem2 50628 |
| Copyright terms: Public domain | W3C validator |