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Mirrors > Home > ILE Home > Th. List > unssd | Unicode version |
Description: A deduction showing the union of two subclasses is a subclass. (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) |
Ref | Expression |
---|---|
unssd.1 | |
unssd.2 |
Ref | Expression |
---|---|
unssd |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | unssd.1 | . 2 | |
2 | unssd.2 | . 2 | |
3 | unss 3250 | . . 3 | |
4 | 3 | biimpi 119 | . 2 |
5 | 1, 2, 4 | syl2anc 408 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 cun 3069 wss 3071 |
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-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-v 2688 df-un 3075 df-in 3077 df-ss 3084 |
This theorem is referenced by: tpssi 3686 casef 6973 un0addcl 9010 un0mulcl 9011 fzosplit 9954 fzouzsplit 9956 exmidunben 11939 strleund 12047 fsumcncntop 12725 bj-omtrans 13154 |
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