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Mirrors > Home > MPE Home > Th. List > r3al | Structured version Visualization version Unicode version |
Description: Triple restricted universal quantification. (Contributed by NM, 19-Nov-1995.) (Proof shortened by Wolf Lammen, 30-Dec-2019.) |
Ref | Expression |
---|---|
r3al |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | r2al 2939 |
. 2
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2 | 19.21v 1868 |
. . . 4
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3 | df-3an 1039 |
. . . . . . 7
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4 | 3 | imbi1i 339 |
. . . . . 6
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5 | impexp 462 |
. . . . . 6
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6 | 4, 5 | bitri 264 |
. . . . 5
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7 | 6 | albii 1747 |
. . . 4
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8 | df-ral 2917 |
. . . . 5
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9 | 8 | imbi2i 326 |
. . . 4
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10 | 2, 7, 9 | 3bitr4ri 293 |
. . 3
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11 | 10 | 2albii 1748 |
. 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 |
This theorem depends on definitions: df-bi 197 df-an 386 df-3an 1039 df-ex 1705 df-ral 2917 |
This theorem is referenced by: pocl 5042 dfwe2 6981 isass 33645 ntrneikb 38392 ntrneixb 38393 |
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