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| Mirrors > Home > MPE Home > Th. List > anidm | Structured version Visualization version GIF version | ||
| Description: Idempotent law for conjunction. (Contributed by NM, 8-Jan-2004.) (Proof shortened by Wolf Lammen, 14-Mar-2014.) |
| Ref | Expression |
|---|---|
| anidm | ⊢ ((𝜑 ∧ 𝜑) ↔ 𝜑) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pm4.24 574 | . 2 ⊢ (𝜑 ↔ (𝜑 ∧ 𝜑)) | |
| 2 | 1 | bicomi 227 | 1 ⊢ ((𝜑 ∧ 𝜑) ↔ 𝜑) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∧ wa 401 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
| This proof depends on definitions: df-bi 210 df-an 402 |
| This theorem is used by: anidmdbi 576 anandi 689 anandir 690 3anidm 1121 truantru 1603 falanfal 1606 nic-axALT 1707 inidm 4172 2reu4lem 4479 opcom 5473 poirr 5571 asymref2 6111 xp11 6167 fununi 6615 brprcneu 6875 brprcneuALT 6876 f13dfv 7282 erinxp 8812 dom2lem 9019 pssnn 9184 djuinf 10267 dmaddpi 10975 dmmulpi 10976 gcddvds 16673 iscatd2 17855 dfiso2 17947 isnsg2 19366 eqger 19390 gaorber 19522 efgcpbllemb 19969 xmeter 24752 caucfil 25604 tgcgr4 28994 axcontlem5 29546 cplgr3v 30016 erclwwlkref 30611 clwwlkn2 30635 erclwwlknref 30660 frgr3v 30876 numclwlk1lem1 30970 disjunsn 33188 bnj594 35542 subfaclefac 35941 isbasisrelowllem1 38278 isbasisrelowllem2 38279 inixp 38662 opideq 39275 cdlemg33b 41764 eelT11 45688 uunT11 45777 uunT11p1 45778 uunT11p2 45779 uun111 45786 |
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