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Related theorems GIF version |
| Description: Define conjunction. |
| Ref | Expression |
|---|---|
| df-a | (a ∩ b) = (a⊥ ∪ b⊥ )⊥ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | wva | . . 3 term a | |
| 2 | wvb | . . 3 term b | |
| 3 | 1, 2 | wa 7 | . 2 term (a ∩ b) |
| 4 | 1 | wn 4 | . . . 4 term a⊥ |
| 5 | 2 | wn 4 | . . . 4 term b⊥ |
| 6 | 4, 5 | wo 6 | . . 3 term (a⊥ ∪ b⊥ ) |
| 7 | 6 | wn 4 | . 2 term (a⊥ ∪ b⊥ )⊥ |
| 8 | 3, 7 | wb 1 | 1 wff (a ∩ b) = (a⊥ ∪ b⊥ )⊥ |
| Colors of variables: term |
| This definition is referenced by: ancom 68 anass 69 lan 70 oran 79 anor1 80 anor2 81 oran3 85 dfb 86 dfnb 87 an1 98 an0 100 anidm 103 a5b 112 a5c 113 di 118 wwfh1 208 wwfh2 209 wwfh3 210 wwfh4 211 ka4lem 221 ni31 242 ud1lem0c 269 ud4lem0c 272 ud5lem0c 273 wran 351 wcomlem 364 wcomdr 403 wfh1 405 wfh2 406 wfh3 407 wfh4 408 wcom2an 410 woml6 418 omla 429 comcom 435 comdr 448 df2c1 450 fh1 451 fh2 452 fh3 453 fh4 454 com2an 466 gsth2 472 i3ran 517 i3con 533 ud1lem1 542 ud3lem3 558 ud4lem1b 560 ud4lem1c 561 ud4lem1 563 ud5lem1b 569 ud5lem1 571 ud5lem3 576 u4lemona 610 u1lemonb 617 u1lemnaa 622 u5lemnaa 626 u4lemnab 635 u5lemnab 636 u1lemnona 647 u2lemnona 648 u3lemnona 649 u4lemnona 650 u5lemnona 651 u1lemnonb 657 u2lemnonb 658 u3lemnonb 659 u4lemnonb 660 u5lemnonb 661 u3lem1n 723 u4lem1n 724 u5lem1n 725 u4lem3n 737 u5lem3n 738 u3lem12 770 i1abs 783 test2 785 2oath1 808 elimconslem 849 elimcons 850 mlaconjo 868 oa6todual 932 oa8todual 951 oal1 980 |