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Mirrors > Home > MPE Home > Th. List > intun | Structured version Visualization version Unicode version |
Description: The class intersection of the union of two classes. Theorem 78 of [Suppes] p. 42. (Contributed by NM, 22-Sep-2002.) |
Ref | Expression |
---|---|
intun |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 19.26 1798 |
. . . 4
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2 | elun 3753 |
. . . . . . 7
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3 | 2 | imbi1i 339 |
. . . . . 6
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4 | jaob 822 |
. . . . . 6
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5 | 3, 4 | bitri 264 |
. . . . 5
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6 | 5 | albii 1747 |
. . . 4
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7 | vex 3203 |
. . . . . 6
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8 | 7 | elint 4481 |
. . . . 5
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9 | 7 | elint 4481 |
. . . . 5
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10 | 8, 9 | anbi12i 733 |
. . . 4
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11 | 1, 6, 10 | 3bitr4i 292 |
. . 3
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12 | 7 | elint 4481 |
. . 3
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13 | elin 3796 |
. . 3
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14 | 11, 12, 13 | 3bitr4i 292 |
. 2
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15 | 14 | eqriv 2619 |
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-v 3202 df-un 3579 df-in 3581 df-int 4476 |
This theorem is referenced by: intunsn 4516 riinint 5382 fiin 8328 elfiun 8336 elrfi 37257 |
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