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Mirrors > Home > MPE Home > Th. List > el2xptp | Structured version Visualization version Unicode version |
Description: A member of a nested Cartesian product is an ordered triple. (Contributed by Alexander van der Vekens, 15-Feb-2018.) |
Ref | Expression |
---|---|
el2xptp |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elxp2 5132 | . 2 | |
2 | opeq1 4402 | . . . . 5 | |
3 | 2 | eqeq2d 2632 | . . . 4 |
4 | 3 | rexbidv 3052 | . . 3 |
5 | 4 | rexxp 5264 | . 2 |
6 | df-ot 4186 | . . . . . . 7 | |
7 | 6 | eqcomi 2631 | . . . . . 6 |
8 | 7 | eqeq2i 2634 | . . . . 5 |
9 | 8 | rexbii 3041 | . . . 4 |
10 | 9 | rexbii 3041 | . . 3 |
11 | 10 | rexbii 3041 | . 2 |
12 | 1, 5, 11 | 3bitri 286 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wb 196 wceq 1483 wcel 1990 wrex 2913 cop 4183 cotp 4185 cxp 5112 |
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 ax-sep 4781 ax-nul 4789 ax-pr 4906 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 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-ral 2917 df-rex 2918 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-sn 4178 df-pr 4180 df-op 4184 df-ot 4186 df-iun 4522 df-opab 4713 df-xp 5120 df-rel 5121 |
This theorem is referenced by: (None) |
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