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| Mirrors > Home > ILE Home > Th. List > opabid | Unicode version | ||
| Description: The law of concretion. Special case of Theorem 9.5 of [Quine] p. 61. (Contributed by NM, 14-Apr-1995.) (Proof shortened by Andrew Salmon, 25-Jul-2011.) |
| Ref | Expression |
|---|---|
| opabid |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | vex 2824 |
. . 3
| |
| 2 | vex 2824 |
. . 3
| |
| 3 | 1, 2 | opex 4369 |
. 2
|
| 4 | copsexg 4384 |
. . 3
| |
| 5 | 4 | bicomd 141 |
. 2
|
| 6 | df-opab 4193 |
. 2
| |
| 7 | 3, 5, 6 | elab2 2974 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4249 ax-pow 4311 ax-pr 4346 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-opab 4193 |
| This theorem is used by: opabidw 4399 opelopabsb 4402 ssopab2b 4419 dmopab 4992 rnopab 5029 funopab 5412 funco 5417 fvmptss2 5780 f1ompt 5859 ovid 6205 enssdom 7048 |
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