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Mirrors > Home > MPE Home > Th. List > tru | Structured version Visualization version GIF version |
Description: The truth value ⊤ is provable. (Contributed by Anthony Hart, 13-Oct-2010.) |
Ref | Expression |
---|---|
tru | ⊢ ⊤ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | id 22 | . 2 ⊢ (∀𝑥 𝑥 = 𝑥 → ∀𝑥 𝑥 = 𝑥) | |
2 | df-tru 1478 | . 2 ⊢ (⊤ ↔ (∀𝑥 𝑥 = 𝑥 → ∀𝑥 𝑥 = 𝑥)) | |
3 | 1, 2 | mpbir 220 | 1 ⊢ ⊤ |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∀wal 1473 = wceq 1475 ⊤wtru 1476 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
This theorem depends on definitions: df-bi 196 df-tru 1478 |
This theorem is referenced by: fal 1482 dftru2 1483 trud 1484 tbtru 1485 bitru 1487 a1tru 1491 truan 1492 truorfal 1502 falortru 1503 truimfal 1506 cadtru 1550 nftru 1721 disjprg 4578 reusv2lem5 4799 rabxfr 4816 reuhyp 4822 euotd 4900 elabrex 6405 caovcl 6726 caovass 6732 caovdi 6751 ectocl 7702 fin1a2lem10 9114 riotaneg 10879 zriotaneg 11367 cshwsexa 13421 eflt 14686 efgi0 17956 efgi1 17957 0frgp 18015 iundisj2 23124 pige3 24073 tanord1 24087 tanord 24088 logtayl 24206 rabtru 28723 iundisj2f 28785 iundisj2fi 28943 ordtcon 29299 allt 31570 nextnt 31574 bj-trut 31740 bj-axd2d 31750 bj-nftru 31773 bj-extru 31843 bj-rabtr 32118 bj-rabtrALT 32119 bj-rabtrALTALT 32120 bj-df-v 32207 bj-finsumval0 32324 wl-impchain-mp-x 32445 wl-impchain-com-1.x 32449 wl-impchain-com-n.m 32454 wl-impchain-a1-x 32458 ftc1anclem5 32659 lhpexle1 34312 mzpcompact2lem 36332 ifpdfor 36828 ifpim1 36832 ifpnot 36833 ifpid2 36834 ifpim2 36835 uun0.1 38026 uunT1 38028 un10 38036 un01 38037 elabrexg 38229 ovn02 39458 |
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