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Related theorems GIF version |
| Description: Conjunction expressed with disjunction. |
| Ref | Expression |
|---|---|
| anor2 | (a⊥ ∩ b) = (a ∪ b⊥ )⊥ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-a 39 | . 2 (a⊥ ∩ b) = (a⊥ ⊥ ∪ b⊥ )⊥ | |
| 2 | ax-a1 29 | . . . . 5 a = a⊥ ⊥ | |
| 3 | 2 | ax-r1 34 | . . . 4 a⊥ ⊥ = a |
| 4 | 3 | ax-r5 37 | . . 3 (a⊥ ⊥ ∪ b⊥ ) = (a ∪ b⊥ ) |
| 5 | 4 | ax-r4 36 | . 2 (a⊥ ⊥ ∪ b⊥ )⊥ = (a ∪ b⊥ )⊥ |
| 6 | 1, 5 | ax-r2 35 | 1 (a⊥ ∩ b) = (a ∪ b⊥ )⊥ |
| Colors of variables: term |
| Syntax hints: = wb 1 ⊥ wn 4 ∪ wo 6 ∩ wa 7 |
| This theorem is referenced by: oran1 83 dff 93 omlem2 120 wwcomd 206 lei3 238 mccune2 239 ni31 242 ud4lem0c 272 ud5lem0c 273 2vwomlem 347 wfh3 407 wfh4 408 fh3 453 fh4 454 i3bi 478 ni32 484 i3th1 525 i3con 533 ud2lem2 546 ud3lem1d 551 ud3lem2 553 ud3lem3 558 ud4lem1a 559 ud4lem1c 561 ud4lem2 564 ud5lem2 572 ud5lem3b 574 ud5lem3c 575 ud5lem3 576 u1lemnaa 622 u2lemnaa 623 u3lemnaa 624 u4lemnaa 625 u5lemnaa 626 u3lemnana 629 u5lemnana 631 u4lemnab 635 u5lemnab 636 u2lemnoa 643 u3lemnoa 644 u4lemnoa 645 u5lemnoa 646 u1lemnonb 657 u3lemnonb 659 u4lemnonb 660 u5lemnonb 661 u3lem1n 723 u4lem1n 724 u5lem1n 725 u3lem3n 736 u1lem11 762 u3lem13a 771 u3lem13b 772 test 784 3vded11 796 neg3antlem2 847 elimcons 850 |
| This theorem was proved from axioms: ax-a1 29 ax-r1 34 ax-r2 35 ax-r4 36 ax-r5 37 |
| This theorem depends on definitions: df-a 39 |