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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 | pm3.22 265 | . 2 ⊢ ((𝜑 ∧ 𝜓) → (𝜓 ∧ 𝜑)) | |
| 2 | pm3.22 265 | . 2 ⊢ ((𝜓 ∧ 𝜑) → (𝜑 ∧ 𝜓)) | |
| 3 | 1, 2 | impbii 126 | 1 ⊢ ((𝜑 ∧ 𝜓) ↔ (𝜓 ∧ 𝜑)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ∧ wa 104 ↔ wb 105 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 |
| This proof depends on definitions: df-bi 117 |
| This theorem is used by: ancomd 267 ancomsd 269 biancomi 270 biancomd 271 pm4.71r 394 pm5.32rd 455 pm5.32ri 459 anbi2ci 463 anbi12ci 465 bianassc 474 mpan10 478 an12 567 an32 568 an13 569 an42 593 andir 831 rbaib 933 rbaibr 934 ifptru 1002 ifpfal 1003 3anrot 1014 3ancoma 1016 excxor 1427 xorcom 1437 xordc 1441 xordc1 1442 dfbi3dc 1446 ancomsimp 1490 exancom 1661 19.29r 1674 19.42h 1739 19.42 1740 eu1 2111 moaneu 2163 moanmo 2164 2eu7 2181 eq2tri 2298 r19.28av 2687 r19.29r 2689 r19.42v 2708 rexcomf 2713 rabswap 2731 euxfr2dc 3011 rmo4 3019 reu8 3022 rmo3f 3023 rmo3 3144 incom 3421 difin2 3493 symdifxor 3497 elif 3652 inuni 4293 eqvinop 4385 uniuni 4599 dtruex 4708 elvvv 4840 brinxp2 4844 dmuni 4993 dfres2 5118 dfima2 5131 imadmrn 5139 imai 5146 cnvxp 5209 cnvcnvsn 5267 mptpreima 5284 rnco 5297 unixpm 5326 ressn 5331 xpcom 5337 fncnv 5450 fununi 5452 imadiflem 5463 fnres 5503 fnopabg 5510 dff1o2 5647 eqfnfv3 5811 respreima 5839 fsn 5883 fliftcnv 6004 isoini 6027 spc2ed 6473 brtpos2 6526 tpostpos 6539 tposmpo 6556 nnaord 6786 pmex 6931 elpmg 6942 mapval2 6963 mapsnend 7103 mapsnen 7104 map1 7105 xpsnen 7123 xpcomco 7128 elfi2 7311 supmoti 7339 cnvti 7365 2omotaplemap 7629 elni2 7687 enq0enq 7804 prltlu 7860 prnmaxl 7861 prnminu 7862 nqprrnd 7916 ltpopr 7968 letri3 8412 lesub0 8814 creur 9297 xrletri3 10223 iooneg 10407 iccneg 10408 elfzuzb 10439 fzrev 10508 redivap 11661 imdivap 11668 rersqreu 11816 lenegsq 11884 climrecvg1n 12139 fisumcom2 12230 fsumcom 12231 fprodcom2fi 12418 fprodcom 12419 gcdcom 12775 bezoutlembi 12807 dfgcd2 12816 lcmcom 12867 isprm2 12920 ballotfilem2 13286 unennn 13346 dfrhm2 14570 issubrng 14616 ntreq0 15358 restopn2 15409 ismet2 15580 blres 15660 metrest 15732 dedekindicclemicc 15858 sincosq3sgn 16055 bpos 16320 lgsdi 16361 lgsquadlem3 16403 2lgslem1a 16412 clwwlkn1 16864 clwwlkn2 16867 iseupthf1o 16894 eupth2lem2dc 16905 idjudju 17252 2alsraln0m 17365 |
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