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Mirrors > Home > ILE Home > Th. List > ancom | GIF version |
Description: Commutative law for conjunction. Theorem *4.3 of [WhiteheadRussell] p. 118. (Contributed by NM, 25-Jun-1998.) (Proof shortened by Wolf Lammen, 4-Nov-2012.) |
Ref | Expression |
---|---|
ancom | ⊢ ((𝜑 ∧ 𝜓) ↔ (𝜓 ∧ 𝜑)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pm3.22 261 | . 2 ⊢ ((𝜑 ∧ 𝜓) → (𝜓 ∧ 𝜑)) | |
2 | pm3.22 261 | . 2 ⊢ ((𝜓 ∧ 𝜑) → (𝜑 ∧ 𝜓)) | |
3 | 1, 2 | impbii 124 | 1 ⊢ ((𝜑 ∧ 𝜓) ↔ (𝜓 ∧ 𝜑)) |
Colors of variables: wff set class |
Syntax hints: ∧ wa 102 ↔ wb 103 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 |
This theorem depends on definitions: df-bi 115 |
This theorem is referenced by: ancomd 263 ancomsd 265 pm4.71r 382 pm5.32rd 438 pm5.32ri 442 anbi2ci 446 anbi12ci 448 mpan10 457 an12 525 an32 526 an13 527 an42 551 andir 765 rbaib 863 rbaibr 864 3anrot 924 3ancoma 926 excxor 1309 xorcom 1319 xordc 1323 xordc1 1324 dfbi3dc 1328 ancomsimp 1369 exancom 1539 19.29r 1552 19.42h 1617 19.42 1618 eu1 1966 moaneu 2017 moanmo 2018 2eu7 2035 eq2tri 2140 r19.28av 2493 r19.29r 2495 r19.42v 2511 rexcomf 2516 rabswap 2532 euxfr2dc 2777 rmo4 2785 reu8 2788 rmo3 2905 incom 3158 difin2 3226 symdifxor 3230 inuni 3930 eqvinop 3998 uniuni 4201 dtruex 4302 elvvv 4421 brinxp2 4425 dmuni 4563 dfres2 4678 dfima2 4690 imadmrn 4698 imai 4701 cnvxp 4762 cnvcnvsn 4817 mptpreima 4834 rnco 4847 unixpm 4873 ressn 4878 xpcom 4884 fncnv 4985 fununi 4987 imadiflem 4998 fnres 5035 fnopabg 5042 dff1o2 5151 eqfnfv3 5288 respreima 5316 fsn 5356 fliftcnv 5455 isoini 5477 spc2ed 5874 brtpos2 5889 tpostpos 5902 tposmpt2 5919 nnaord 6105 xpsnen 6318 xpcomco 6323 supmoti 6406 cnvti 6432 elni2 6504 enq0enq 6621 prltlu 6677 prnmaxl 6678 prnminu 6679 nqprrnd 6733 ltpopr 6785 letri3 7192 lesub0 7583 creur 8036 xrletri3 8875 iooneg 9010 iccneg 9011 elfzuzb 9039 fzrev 9101 redivap 9761 imdivap 9768 rersqreu 9914 lenegsq 9981 climrecvg1n 10185 gcdcom 10365 bezoutlembi 10394 dfgcd2 10403 lcmcom 10446 isprm2 10499 |
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