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Mirrors > Home > ILE Home > Th. List > dmsn0 | Unicode version |
Description: The domain of the singleton of the empty set is empty. (Contributed by NM, 30-Jan-2004.) |
Ref | Expression |
---|---|
dmsn0 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0nelxp 4639 | . . . 4 | |
2 | dmsnm 5076 | . . . 4 | |
3 | 1, 2 | mtbi 665 | . . 3 |
4 | alnex 1492 | . . 3 | |
5 | 3, 4 | mpbir 145 | . 2 |
6 | eq0 3433 | . 2 | |
7 | 5, 6 | mpbir 145 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wal 1346 wceq 1348 wex 1485 wcel 2141 cvv 2730 c0 3414 csn 3583 cxp 4609 cdm 4611 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 609 ax-in2 610 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-14 2144 ax-ext 2152 ax-sep 4107 ax-pow 4160 ax-pr 4194 |
This theorem depends on definitions: df-bi 116 df-3an 975 df-tru 1351 df-fal 1354 df-nf 1454 df-sb 1756 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ne 2341 df-v 2732 df-dif 3123 df-un 3125 df-in 3127 df-ss 3134 df-nul 3415 df-pw 3568 df-sn 3589 df-pr 3590 df-op 3592 df-br 3990 df-opab 4051 df-xp 4617 df-dm 4621 |
This theorem is referenced by: cnvsn0 5079 1st0 6123 2nd0 6124 |
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