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| Description: Deduce a converse implication from a logical equivalence. |
| Ref | Expression |
|---|---|
| biimpd.1 |
|
| Ref | Expression |
|---|---|
| biimprd |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | biimpd.1 |
. 2
| |
| 2 | bi2 149 |
. 2
| |
| 3 | 1, 2 | syl 10 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: biimprcd 156 mpbiri 194 mpbird 196 sylibrd 204 sylbird 205 syl5bir 210 syl6bir 215 biimpar 417 bitrd 526 anbi2d 614 mtbid 712 mtbii 714 dral1 1150 sb9i 1258 ax16i 1265 a4eiv 1269 a16g 1271 elabgt 1886 sspsstr 2141 axsep2 2694 so 2855 rabsnt 2884 ralxfrd 2887 dfwe2 2925 wefrc 2933 ordsseleq 2966 oneqmini 3007 ordsssuc2 3049 ordsucelsuc 3063 ordunel 3074 orduniorsuc 3077 ordzsl 3106 tfinds 3151 opelxpi 3207 2elresin 3584 tz6.12c 3725 fveqres 3734 dffo4 3805 fconst5 3833 f1owe 3890 f1oweALT 3891 tfrlem9 3904 tz7.48lem 3940 abianfp 3947 ndmordi 4037 oawordeulem 4172 om00 4190 omlimcl 4193 odi 4194 f1oen2g 4375 f1domg 4377 sbthlem1 4427 fiint 4534 inf3lem3 4587 trcl 4617 r1tr 4626 rankr1 4646 brdom6disj 4777 unidom 4780 entri 4811 cardaleph 4857 indpi 5006 prlem934a 5109 addcanpr 5124 reclem3pr 5130 lttri4t 5487 lelttrt 5496 xrlttrit 5525 xrlelttrt 5535 add20 5576 nnmulclt 5889 lbreu 5992 arch 6018 supxrre 6030 nnnegz 6085 zeot 6146 dfuz 6150 uzwo5OLD 6159 zmax 6168 ioossicc 6330 icoshft 6341 expordt 6533 sqrlem6 6608 absrpclt 6790 nn0absclt 6816 bcclt 6910 climmulc2 7065 iserzcmp0 7079 caucvglem5 7097 reccnv 7153 rescncf 7207 mulc1cncf 7214 infpnlem1 7449 ntrval 7618 cncnplem4 7716 metcnss 7837 metcnss2 7838 dscmet 7856 iscms2lem3 7925 cmsss 7931 sm1cnilem 8281 blocn2 8399 efifolem5 8641 shftefif1olem 8661 shftefif1olemOLD 8662 eff1i 8665 hlim0 9026 projlem15 9116 spanun 9382 spansncol 9407 spansneleq 9409 spansneleqOLD 9410 spansnsst 9411 elspansn5t 9414 0cnop 9819 0cnfn 9820 idcnop 9821 lnopcon 9878 lnfncon 9905 pjnormss 10007 dmdmdt 10137 mdslmd1lem1 10160 mdslmd1lem2 10161 elghomlem2 10288 ghomgsg 10300 ghomf1olem 10301 cayleylem2 10317 ompfl2OLD 10327 uninqs 10342 fiv 10374 mapdiscn 10398 cnvhmphb 10413 efilcp2 10450 |
| 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 |