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Mirrors > Home > MPE Home > Th. List > dftp2 | Structured version Visualization version Unicode version |
Description: Alternate definition of unordered triple of classes. Special case of Definition 5.3 of [TakeutiZaring] p. 16. (Contributed by NM, 8-Apr-1994.) |
Ref | Expression |
---|---|
dftp2 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | vex 3050 |
. . 3
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2 | 1 | eltp 4019 |
. 2
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3 | 2 | abbi2i 2568 |
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 1671 ax-4 1684 ax-5 1760 ax-6 1807 ax-7 1853 ax-10 1917 ax-11 1922 ax-12 1935 ax-13 2093 ax-ext 2433 |
This theorem depends on definitions: df-bi 189 df-or 372 df-an 373 df-3or 987 df-tru 1449 df-ex 1666 df-nf 1670 df-sb 1800 df-clab 2440 df-cleq 2446 df-clel 2449 df-nfc 2583 df-v 3049 df-un 3411 df-sn 3971 df-pr 3973 df-tp 3975 |
This theorem is referenced by: tprot 4070 tpid3g 4090 en3lplem2 8125 tpid3gVD 37248 en3lplem2VD 37250 |
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