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| Description: Associative law for conjunction. Theorem *4.32 of [WhiteheadRussell] p. 118. |
| Ref | Expression |
|---|---|
| anass |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | impexp 347 |
. . . 4
| |
| 2 | imnan 242 |
. . . . 5
| |
| 3 | 2 | imbi2i 185 |
. . . 4
|
| 4 | 1, 3 | bitr 173 |
. . 3
|
| 5 | 4 | negbii 187 |
. 2
|
| 6 | df-an 225 |
. 2
| |
| 7 | df-an 225 |
. 2
| |
| 8 | 5, 6, 7 | 3bitr4 183 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: an12 484 an23 485 an4 506 prlem2 770 3anass 778 4exdistr 1311 2sb5 1333 2sb5rf 1336 sbel2x 1343 euan 1426 r2ex 1688 r19.41v 1760 reeanv 1775 ceqsex2 1832 gencbvex 1834 ceqsrex2v 1886 inass 2219 difrab 2269 axsep2 2699 eqvinop 2786 copsexg 2787 opabid 2805 uniuni 2875 reuxfr2 2898 wefrc 2938 onminex 3015 elxp2 3198 resopab2 3390 asymref 3431 elxp4 3445 elxp5 3446 ssrnres 3473 cores 3491 coass 3504 imadif 3566 fcoi1 3636 imaiun 3855 isoini 3891 f1oiso 3895 dfrdg2 3924 dfoprab2 3982 fnoprval 4008 oprabex3 4013 oprabval3 4021 dfoprab5 4105 foprab2 4109 mapsnen 4416 xpsnen 4421 xpassen 4427 abfii2 4542 zfregs 4627 bnd2 4704 aceq1 4709 aceq5lem1 4715 aceq5lem2 4716 aceq5lem5 4719 kmlem3 4747 kmlem14 4758 ltexpi 5009 genpass 5092 distrlem1pr 5107 distrlem5pr 5111 ltexprlem4 5125 reclem2pr 5137 elreal 5230 axaddopr 5245 axmulopr 5246 infm3 6009 infmsup 6023 zmin 6175 qbtwnre 6224 elioo3g 6325 rexuz 6384 rexuz2 6385 nnwos 6400 elfz2t 6412 elfzlem 6413 sumex 6927 elcncf1d 7213 abscncflem 7217 infpn2 7460 infmap2lem1 7529 istps2 7557 istps3 7558 tgss3t 7588 cncnplem4 7727 blfval2 7788 blrn2 7794 opnin 7821 cncfmet 7857 bcthlem14 7962 grpidinvlem3 8000 pilem1 8609 h2hlm 8789 sh2 9030 ocsh 9095 osumlem5 9522 nmcopexlem1 9889 nmcfnexlem1 9918 cvbr2t 10148 cvnbtwn2t 10152 mdsl2 10186 cvmd 10188 mdsymlem2 10268 sumdmdi 10278 hmeogrp 10461 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 |
| This theorem depends on definitions: df-bi 147 df-an 225 |