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Mirrors > Home > MPE Home > Th. List > unss12 | Structured version Visualization version Unicode version |
Description: Subclass law for union of classes. (Contributed by NM, 2-Jun-2004.) |
Ref | Expression |
---|---|
unss12 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | unss1 3782 | . 2 | |
2 | unss2 3784 | . 2 | |
3 | 1, 2 | sylan9ss 3616 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wa 384 cun 3572 wss 3574 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-v 3202 df-un 3579 df-in 3581 df-ss 3588 |
This theorem is referenced by: pwssun 5020 fun 6066 undom 8048 finsschain 8273 trclun 13755 relexpfld 13789 mvdco 17865 dprd2da 18441 dmdprdsplit2lem 18444 lspun 18987 spanuni 28403 sshhococi 28405 mthmpps 31479 mblfinlem3 33448 dochdmj1 36679 mptrcllem 37920 clcnvlem 37930 dfrcl2 37966 relexpss1d 37997 corclrcl 37999 relexp0a 38008 corcltrcl 38031 frege131d 38056 |
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