Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > 3bitr4i | GIF version |
Description: A chained inference from transitive law for logical equivalence. This inference is frequently used to apply a definition to both sides of a logical equivalence. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
3bitr4i.1 | ⊢ (𝜑 ↔ 𝜓) |
3bitr4i.2 | ⊢ (𝜒 ↔ 𝜑) |
3bitr4i.3 | ⊢ (𝜃 ↔ 𝜓) |
Ref | Expression |
---|---|
3bitr4i | ⊢ (𝜒 ↔ 𝜃) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 3bitr4i.2 | . 2 ⊢ (𝜒 ↔ 𝜑) | |
2 | 3bitr4i.1 | . . 3 ⊢ (𝜑 ↔ 𝜓) | |
3 | 3bitr4i.3 | . . 3 ⊢ (𝜃 ↔ 𝜓) | |
4 | 2, 3 | bitr4i 185 | . 2 ⊢ (𝜑 ↔ 𝜃) |
5 | 1, 4 | bitri 182 | 1 ⊢ (𝜒 ↔ 𝜃) |
Colors of variables: wff set class |
Syntax hints: ↔ wb 103 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 |
This theorem depends on definitions: df-bi 115 |
This theorem is referenced by: bibi2d 230 pm4.71 381 pm5.32ri 442 mpan10 457 an31 528 an4 550 or4 720 ordir 763 andir 765 dcbii 780 3anrot 924 3orrot 925 3ancoma 926 3orcomb 928 3ioran 934 3anbi123i 1127 3orbi123i 1128 3or6 1254 xorcom 1319 nfbii 1402 19.26-3an 1412 alnex 1428 19.42h 1617 19.42 1618 equsal 1655 sb6 1807 eeeanv 1849 sbbi 1874 sbco3xzyz 1888 sbcom2v 1902 sbel2x 1915 sb8eu 1954 sb8mo 1955 sb8euh 1964 eu1 1966 cbvmo 1981 mo3h 1994 sbmo 2000 eqcom 2083 abeq1 2188 cbvab 2201 clelab 2203 nfceqi 2215 sbabel 2244 ralbii2 2376 rexbii2 2377 r2alf 2383 r2exf 2384 nfraldya 2400 nfrexdya 2401 r3al 2408 r19.41 2509 r19.42v 2511 ralcomf 2515 rexcomf 2516 reean 2522 3reeanv 2524 rabid2 2530 rabbi 2531 reubiia 2538 rmobiia 2543 reu5 2566 rmo5 2569 cbvralf 2571 cbvrexf 2572 cbvreu 2575 cbvrmo 2576 vjust 2602 ceqsex3v 2641 ceqsex4v 2642 ceqsex8v 2644 eueq 2763 reu2 2780 reu6 2781 reu3 2782 rmo4 2785 2rmorex 2796 cbvsbc 2842 sbccomlem 2888 rmo3 2905 csbabg 2963 cbvralcsf 2964 cbvrexcsf 2965 cbvreucsf 2966 eqss 3014 uniiunlem 3082 ssequn1 3142 unss 3146 rexun 3152 ralunb 3153 elin3 3157 incom 3158 inass 3176 ssin 3188 ssddif 3198 unssdif 3199 difin 3201 invdif 3206 indif 3207 indi 3211 symdifxor 3230 disj3 3296 rexsns 3432 reusn 3463 prss 3541 tpss 3550 eluni2 3605 elunirab 3614 uniun 3620 uni0b 3626 unissb 3631 elintrab 3648 ssintrab 3659 intun 3667 intpr 3668 iuncom 3684 iuncom4 3685 iunab 3724 ssiinf 3727 iinab 3739 iunin2 3741 iunun 3755 iunxun 3756 iunxiun 3757 sspwuni 3760 iinpw 3763 cbvdisj 3776 brun 3831 brin 3832 brdif 3833 dftr2 3877 inuni 3930 repizf2lem 3935 unidif0 3941 ssext 3976 pweqb 3978 otth2 3996 opelopabsbALT 4014 eqopab2b 4034 pwin 4037 unisuc 4168 sucexb 4241 elnn 4346 xpiundi 4416 xpiundir 4417 poinxp 4427 soinxp 4428 seinxp 4429 inopab 4486 difopab 4487 raliunxp 4495 rexiunxp 4496 iunxpf 4502 cnvco 4538 dmiun 4562 dmuni 4563 dm0rn0 4570 brres 4636 dmres 4650 cnvsym 4728 asymref 4730 codir 4733 qfto 4734 cnvopab 4746 cnvdif 4750 rniun 4754 dminss 4758 imainss 4759 cnvcnvsn 4817 resco 4845 imaco 4846 rnco 4847 coiun 4850 coass 4859 ressn 4878 cnviinm 4879 xpcom 4884 funcnv 4980 funcnv3 4981 fncnv 4985 fun11 4986 fnres 5035 dfmpt3 5041 fnopabg 5042 fintm 5095 fin 5096 fores 5135 dff1o3 5152 fun11iun 5167 f11o 5179 f1ompt 5341 fsn 5356 imaiun 5420 isores2 5473 eqoprab2b 5583 opabex3d 5768 opabex3 5769 dfopab2 5835 dfoprab3s 5836 fmpt2x 5846 tpostpos 5902 dfsmo2 5925 qsid 6194 xpassen 6327 diffitest 6371 supmoti 6406 eqinfti 6433 distrnqg 6577 ltbtwnnq 6606 distrnq0 6649 nqprrnd 6733 ltresr 7007 elznn0nn 8365 xrnemnf 8853 xrnepnf 8854 elioomnf 8991 elxrge0 9001 elfzuzb 9039 fzass4 9080 elfz2nn0 9128 elfzo2 9160 elfzo3 9172 lbfzo0 9190 fzind2 9248 rexfiuz 9875 infssuzex 10345 bdceq 10633 |
Copyright terms: Public domain | W3C validator |