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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 486 an23 487 an4 508 prlem2 773 3anass 781 4exdistr 1315 2sb5 1337 2sb5rf 1340 sbel2x 1347 euan 1430 r2ex 1694 r19.41v 1766 reeanv 1781 ceqsex2 1839 gencbvex 1841 ceqsrex2v 1893 inass 2226 difrab 2276 axsep2 2709 eqvinop 2797 copsexg 2798 opabid 2816 uniuni 2886 reuxfr2 2909 wefrc 2949 onminex 3026 elxp2 3209 resopab2 3404 asymref 3445 elxp4 3459 elxp5 3460 ssrnres 3487 cores 3505 coass 3518 imadif 3580 fcoi1 3651 imaiun 3870 isoini 3906 f1oiso 3910 dfrdg2 3939 dfoprab2 3997 fnoprval 4023 oprabex3 4028 oprabval3 4036 dfoprab5 4121 foprab2 4125 mapsnen 4435 xpsnen 4441 xpassen 4447 zfregs 4657 bnd2 4734 aceq1 4739 aceq5lem1 4745 aceq5lem2 4746 aceq5lem5 4749 kmlem3 4777 kmlem14 4788 ltexpi 5041 genpass 5124 distrlem1pr 5139 distrlem5pr 5143 ltexprlem4 5157 reclem2pr 5169 elreal 5262 axaddopr 5277 axmulopr 5278 infm3 6056 infmsup 6070 zmin 6221 qbtwnre 6279 elioo3g 6381 rexuz 6445 rexuz2 6446 nnwos 6461 elfz2t 6473 elfzlem 6474 sumex 6981 elcncf1d 7270 abscncflem 7274 infpn2 7510 infmap2lem1 7581 istps2 7608 istps3 7609 tgss3t 7637 cncnplem4 7774 blfval2 7833 blrn2 7839 opnin 7866 cncfmet 7902 bcthlem14 8009 grpidinvlem3 8047 pilem1 8666 h2hlm 8845 sh2 9086 ocsh 9151 osumlem5 9577 nmcopexlem1 9946 nmcfnexlem1 9975 cvbr2t 10205 cvnbtwn2t 10209 mdsl2 10244 cvmd 10246 mdsymlem2 10326 sumdmdi 10337 hmeogrp 10524 |
| 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 |