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Mirrors > Home > MPE Home > Th. List > rexun | Structured version Visualization version Unicode version |
Description: Restricted existential quantification over union. (Contributed by Jeff Madsen, 5-Jan-2011.) |
Ref | Expression |
---|---|
rexun |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-rex 2918 |
. 2
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2 | 19.43 1810 |
. . 3
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3 | elun 3753 |
. . . . . 6
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4 | 3 | anbi1i 731 |
. . . . 5
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5 | andir 912 |
. . . . 5
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6 | 4, 5 | bitri 264 |
. . . 4
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7 | 6 | exbii 1774 |
. . 3
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8 | df-rex 2918 |
. . . 4
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9 | df-rex 2918 |
. . . 4
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10 | 8, 9 | orbi12i 543 |
. . 3
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11 | 2, 7, 10 | 3bitr4i 292 |
. 2
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12 | 1, 11 | bitri 264 |
1
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Colors of variables: wff setvar class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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-rex 2918 df-v 3202 df-un 3579 |
This theorem is referenced by: rexprg 4235 rextpg 4237 iunxun 4605 oarec 7642 zornn0g 9327 scshwfzeqfzo 13572 rpnnen2lem12 14954 dvdsprmpweqnn 15589 vdwlem6 15690 pmatcollpw3fi1 20593 cmpfi 21211 poimirlem25 33434 unima 39346 |
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