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Mirrors > Home > ILE Home > Th. List > impbid1 | Unicode version |
Description: Infer an equivalence from two implications. (Contributed by NM, 6-Mar-2007.) |
Ref | Expression |
---|---|
impbid1.1 | |
impbid1.2 |
Ref | Expression |
---|---|
impbid1 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | impbid1.1 | . 2 | |
2 | impbid1.2 | . . 3 | |
3 | 2 | a1i 9 | . 2 |
4 | 1, 3 | impbid 127 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wb 103 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia2 105 ax-ia3 106 |
This theorem depends on definitions: df-bi 115 |
This theorem is referenced by: impbid2 141 iba 294 ibar 295 pm4.81dc 847 pm5.63dc 887 pm4.83dc 892 pm5.71dc 902 19.33b2 1560 19.9t 1573 sb4b 1755 a16gb 1786 euor2 1999 eupickbi 2023 ceqsalg 2627 eqvincg 2719 ddifstab 3104 csbprc 3289 undif4 3306 sssnm 3546 sneqbg 3555 opthpr 3564 elpwuni 3762 eusv2i 4205 reusv3 4210 iunpw 4229 suc11g 4300 xpid11m 4575 ssxpbm 4776 ssxp1 4777 ssxp2 4778 xp11m 4779 2elresin 5030 mpteqb 5282 f1fveq 5432 f1elima 5433 f1imass 5434 fliftf 5459 iserd 6155 ecopovtrn 6226 ecopover 6227 ecopovtrng 6229 ecopoverg 6230 fopwdom 6333 addcanpig 6524 mulcanpig 6525 srpospr 6959 readdcan 7248 cnegexlem1 7283 addcan 7288 addcan2 7289 neg11 7359 negreb 7373 add20 7578 cru 7702 mulcanapd 7751 uz11 8641 eqreznegel 8699 lbzbi 8701 xneg11 8901 elioc2 8959 elico2 8960 elicc2 8961 fzopth 9079 2ffzeq 9151 flqidz 9288 addmodlteq 9400 frec2uzrand 9407 expcan 9644 nn0opthd 9649 cj11 9792 sqrt0 9890 recan 9995 0dvds 10215 dvds1 10253 alzdvds 10254 nn0enne 10302 nn0oddm1d2 10309 nnoddm1d2 10310 divalgmod 10327 gcdeq0 10368 algcvgblem 10431 prmexpb 10530 bj-peano4 10750 bj-nn0sucALT 10773 |
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