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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 354 |
. . . 4
| |
| 2 | imnan 249 |
. . . . 5
| |
| 3 | 2 | imbi2i 192 |
. . . 4
|
| 4 | 1, 3 | bitri 180 |
. . 3
|
| 5 | 4 | notbii 194 |
. 2
|
| 6 | df-an 232 |
. 2
| |
| 7 | df-an 232 |
. 2
| |
| 8 | 5, 6, 7 | 3bitr4i 190 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: an12 495 an23 496 an4 517 prlem2 783 3anass 791 4exdistr 1355 2sb5 1377 2sb5rf 1380 sbel2x 1387 euan 1470 r2ex 1738 r19.41v 1810 reeanv 1825 ceqsex2 1883 gencbvex 1885 ceqsrex2v 1937 inass 2274 difrab 2324 axsep2 2759 eqvinop 2847 copsexg 2848 opabid 2866 uniuni 2937 reuxfr2 2960 wefrc 3000 onminex 3077 elxp2 3260 resopab2 3455 asymref 3496 elxp4 3510 elxp5 3511 ssrnres 3538 cores 3556 coass 3569 imadif 3631 fcoi1 3702 imaiun 3921 isoini 3958 f1oiso 3962 dfrdg2 3991 dfoprab2 4049 fnoprval 4075 oprabex3 4080 oprabval3 4088 dfoprab5 4173 foprab2 4177 mapsnen 4490 xpsnen 4498 xpassen 4504 abfii2 4622 zfregs 4709 bnd2 4786 aceq1 4791 aceq5lem1 4797 aceq5lem2 4798 aceq5lem5 4801 kmlem3 4829 kmlem14 4840 ltexpi 5094 genpass 5177 distrlem1pr 5192 distrlem5pr 5196 ltexprlem4 5210 reclem2pr 5222 elreal 5315 axaddopr 5330 axmulopr 5331 infm3 6136 infmsup 6150 zmin 6304 qbtwnre 6331 elioo3g 6405 rexuz 6470 rexuz2 6471 nnwos 6486 elfz2 6498 elfzlem 6499 sumex 7071 elcncf1di 7360 abscncflem 7364 infpn2 7601 infmap2lem1 7671 istps2 7698 istps3 7699 tgss3 7727 cncnplem4 7862 blfval2 7921 blrn2 7927 opnin 7954 cncfmet 7990 bcthlem14 8097 grpidinvlem3 8135 pilem1 8754 h2hlm 8933 sh2 9174 ocsh 9239 osumlem5 9665 nmcopexlem1 10034 nmcfnexlem1 10063 cvbr2 10294 cvnbtwn2 10298 mdsl2i 10333 cvmdi 10335 mdsymlem2 10415 sumdmdii 10426 hmeogrp 10632 |
| 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 154 df-an 232 |