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Mirrors > Home > NFE Home > Th. List > csbunig | Unicode version |
Description: Distribute proper substitution through the union of a class. (Contributed by Alan Sare, 10-Nov-2012.) |
Ref | Expression |
---|---|
csbunig |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | csbabg 3198 |
. . 3
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2 | sbcexg 3097 |
. . . . 5
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3 | sbcang 3090 |
. . . . . . 7
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4 | sbcg 3112 |
. . . . . . . 8
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5 | sbcel2g 3158 |
. . . . . . . 8
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6 | 4, 5 | anbi12d 691 |
. . . . . . 7
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7 | 3, 6 | bitrd 244 |
. . . . . 6
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8 | 7 | exbidv 1626 |
. . . . 5
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9 | 2, 8 | bitrd 244 |
. . . 4
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10 | 9 | abbidv 2468 |
. . 3
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11 | 1, 10 | eqtrd 2385 |
. 2
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12 | df-uni 3893 |
. . 3
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13 | 12 | csbeq2i 3163 |
. 2
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14 | df-uni 3893 |
. 2
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15 | 11, 13, 14 | 3eqtr4g 2410 |
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 1546 ax-5 1557 ax-17 1616 ax-9 1654 ax-8 1675 ax-6 1729 ax-7 1734 ax-11 1746 ax-12 1925 ax-ext 2334 |
This theorem depends on definitions: df-bi 177 df-or 359 df-an 360 df-tru 1319 df-ex 1542 df-nf 1545 df-sb 1649 df-clab 2340 df-cleq 2346 df-clel 2349 df-nfc 2479 df-v 2862 df-sbc 3048 df-csb 3138 df-uni 3893 |
This theorem is referenced by: (None) |
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