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| Description: Define conjunction ('and') of 3 wff.s. Definition *4.34 of [WhiteheadRussell] p. 118. This abbreviation reduces the number of parentheses and emphasizes that the order of bracketing is not important by virtue of the associative law anass 401. (Contributed by NM, 8-Apr-1994.) |
| Ref | Expression |
|---|---|
| df-3an |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | wph |
. . 3
| |
| 2 | wps |
. . 3
| |
| 3 | wch |
. . 3
| |
| 4 | 1, 2, 3 | w3a 981 |
. 2
|
| 5 | 1, 2 | wa 104 |
. . 3
|
| 6 | 5, 3 | wa 104 |
. 2
|
| 7 | 4, 6 | wb 105 |
1
|
| Colors of variables: wff set class |
| This definition is referenced by: 3anass 985 3anrot 986 3ancoma 988 3anan32 992 3ioran 996 3simpa 997 3pm3.2i 1178 pm3.2an3 1179 3jca 1180 3anbi123i 1191 3imp 1196 3anbi123d 1325 3anim123d 1332 an6 1334 19.26-3an 1506 hb3an 1573 nf3an 1589 nf3and 1592 eeeanv 1961 sb3an 1986 mopick2 2137 r19.26-3 2636 3reeanv 2677 ceqsex3v 2815 ceqsex4v 2816 ceqsex8v 2818 sbc3an 3060 elin3 3364 rexdifpr 3661 raltpg 3686 tpss 3799 dfopg 3817 opeq1 3819 opeq2 3820 opm 4278 otth2 4285 poirr 4354 po3nr 4357 wepo 4406 wetrep 4407 rabxp 4712 brinxp2 4742 brinxp 4743 sotri2 5080 sotri3 5081 f1orn 5532 dff1o6 5845 isosolem 5893 oprabid 5976 caovimo 6140 elovmpo 6145 elovmporab 6146 elovmporab1w 6147 dfxp3 6280 nnaord 6595 fiintim 7028 prmuloc 7679 ltrelxr 8133 rexuz2 9702 ltxr 9897 elixx3g 10023 elioo4g 10056 elioopnf 10089 elioomnf 10090 elicopnf 10091 elxrge0 10100 divelunit 10124 elfz2 10137 elfzuzb 10141 uzsplit 10214 fznn0 10235 elfzmlbp 10254 elfzo2 10272 fzolb2 10277 fzouzsplit 10303 ssfzo12bi 10354 fzind2 10368 dfrp2 10406 ccatsymb 11058 swrdsbslen 11119 swrdspsleq 11120 abs2dif 11417 sumeq2 11670 divalgb 12236 bitsval2 12255 divgcdz 12292 rplpwr 12348 nnwosdc 12360 cncongr1 12425 pythagtriplem2 12589 pythagtrip 12606 xpscf 13179 issgrpd 13244 issubm2 13305 issubg3 13528 resgrpisgrp 13531 eqgval 13559 eqger 13560 eqgabl 13666 qusecsub 13667 rnglz 13707 rngpropd 13717 ringpropd 13800 ringrghm 13824 zndvds 14411 znleval 14415 znleval2 14416 isbasis3g 14518 lmfval 14664 lmbr 14685 lmbr2 14686 xmeterval 14907 xmeter 14908 cnbl0 15006 cnblcld 15007 limcrcl 15130 gausslemma2dlem1a 15535 bd3an 15766 |
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