Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > dmcoss | Unicode version |
Description: Domain of a composition. Theorem 21 of [Suppes] p. 63. (Contributed by NM, 19-Mar-1998.) (Proof shortened by Andrew Salmon, 27-Aug-2011.) |
Ref | Expression |
---|---|
dmcoss |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfe1 1425 | . . . 4 | |
2 | exsimpl 1548 | . . . . 5 | |
3 | vex 2604 | . . . . . 6 | |
4 | vex 2604 | . . . . . 6 | |
5 | 3, 4 | opelco 4525 | . . . . 5 |
6 | breq2 3789 | . . . . . 6 | |
7 | 6 | cbvexv 1836 | . . . . 5 |
8 | 2, 5, 7 | 3imtr4i 199 | . . . 4 |
9 | 1, 8 | exlimi 1525 | . . 3 |
10 | 3 | eldm2 4551 | . . 3 |
11 | 3 | eldm 4550 | . . 3 |
12 | 9, 10, 11 | 3imtr4i 199 | . 2 |
13 | 12 | ssriv 3003 | 1 |
Colors of variables: wff set class |
Syntax hints: wa 102 wex 1421 wcel 1433 wss 2973 cop 3401 class class class wbr 3785 cdm 4363 ccom 4367 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-14 1445 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 ax-sep 3896 ax-pow 3948 ax-pr 3964 |
This theorem depends on definitions: df-bi 115 df-3an 921 df-tru 1287 df-nf 1390 df-sb 1686 df-eu 1944 df-mo 1945 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-v 2603 df-un 2977 df-in 2979 df-ss 2986 df-pw 3384 df-sn 3404 df-pr 3405 df-op 3407 df-br 3786 df-opab 3840 df-co 4372 df-dm 4373 |
This theorem is referenced by: rncoss 4620 dmcosseq 4621 cossxp 4863 funco 4960 cofunexg 5758 |
Copyright terms: Public domain | W3C validator |