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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 980 |
. 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 984 3anrot 985 3ancoma 987 3anan32 991 3ioran 995 3simpa 996 3pm3.2i 1177 pm3.2an3 1178 3jca 1179 3anbi123i 1190 3imp 1195 3anbi123d 1324 3anim123d 1331 an6 1333 19.26-3an 1505 hb3an 1572 nf3an 1588 nf3and 1591 eeeanv 1960 sb3an 1985 mopick2 2136 r19.26-3 2635 3reeanv 2676 ceqsex3v 2814 ceqsex4v 2815 ceqsex8v 2817 sbc3an 3059 elin3 3363 rexdifpr 3660 raltpg 3685 tpss 3798 dfopg 3816 opeq1 3818 opeq2 3819 opm 4277 otth2 4284 poirr 4353 po3nr 4356 wepo 4405 wetrep 4406 rabxp 4711 brinxp2 4741 brinxp 4742 sotri2 5079 sotri3 5080 f1orn 5531 dff1o6 5844 isosolem 5892 oprabid 5975 caovimo 6139 elovmpo 6144 elovmporab 6145 elovmporab1w 6146 dfxp3 6279 nnaord 6594 fiintim 7027 prmuloc 7678 ltrelxr 8132 rexuz2 9701 ltxr 9896 elixx3g 10022 elioo4g 10055 elioopnf 10088 elioomnf 10089 elicopnf 10090 elxrge0 10099 divelunit 10123 elfz2 10136 elfzuzb 10140 uzsplit 10213 fznn0 10234 elfzmlbp 10253 elfzo2 10271 fzolb2 10276 fzouzsplit 10301 ssfzo12bi 10352 fzind2 10366 dfrp2 10404 ccatsymb 11056 abs2dif 11388 sumeq2 11641 divalgb 12207 bitsval2 12226 divgcdz 12263 rplpwr 12319 nnwosdc 12331 cncongr1 12396 pythagtriplem2 12560 pythagtrip 12577 xpscf 13150 issgrpd 13215 issubm2 13276 issubg3 13499 resgrpisgrp 13502 eqgval 13530 eqger 13531 eqgabl 13637 qusecsub 13638 rnglz 13678 rngpropd 13688 ringpropd 13771 ringrghm 13795 zndvds 14382 znleval 14386 znleval2 14387 isbasis3g 14489 lmfval 14635 lmbr 14656 lmbr2 14657 xmeterval 14878 xmeter 14879 cnbl0 14977 cnblcld 14978 limcrcl 15101 gausslemma2dlem1a 15506 bd3an 15728 |
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