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Mirrors > Home > ILE Home > Th. List > 3bitri | GIF version |
Description: A chained inference from transitive law for logical equivalence. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
3bitri.1 | ⊢ (𝜑 ↔ 𝜓) |
3bitri.2 | ⊢ (𝜓 ↔ 𝜒) |
3bitri.3 | ⊢ (𝜒 ↔ 𝜃) |
Ref | Expression |
---|---|
3bitri | ⊢ (𝜑 ↔ 𝜃) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 3bitri.1 | . 2 ⊢ (𝜑 ↔ 𝜓) | |
2 | 3bitri.2 | . . 3 ⊢ (𝜓 ↔ 𝜒) | |
3 | 3bitri.3 | . . 3 ⊢ (𝜒 ↔ 𝜃) | |
4 | 2, 3 | bitri 183 | . 2 ⊢ (𝜓 ↔ 𝜃) |
5 | 1, 4 | bitri 183 | 1 ⊢ (𝜑 ↔ 𝜃) |
Colors of variables: wff set class |
Syntax hints: ↔ wb 104 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 |
This theorem depends on definitions: df-bi 116 |
This theorem is referenced by: bibi1i 227 an32 551 orbi1i 752 orass 756 or32 759 dcan 918 dn1dc 944 an6 1299 excxor 1356 trubifal 1394 truxortru 1397 truxorfal 1398 falxortru 1399 falxorfal 1400 alrot4 1462 excom13 1667 sborv 1862 3exdistr 1887 4exdistr 1888 eeeanv 1903 ee4anv 1904 ee8anv 1905 sb3an 1929 elsb3 1949 elsb4 1950 sb9 1952 sbnf2 1954 sbco4 1980 2exsb 1982 sb8eu 2010 sb8euh 2020 sbmo 2056 2eu4 2090 2eu7 2091 r19.26-3 2560 rexcom13 2594 cbvreu 2650 ceqsex2 2721 ceqsex4v 2724 spc3gv 2773 ralrab2 2844 rexrab2 2846 reu2 2867 rmo4 2872 reu8 2875 rmo3f 2876 sbc3an 2965 rmo3 2995 dfss2 3081 ss2rab 3168 rabss 3169 ssrab 3170 dfdif3 3181 undi 3319 undif3ss 3332 difin2 3333 dfnul2 3360 disj 3406 disjsn 3580 uni0c 3757 ssint 3782 iunss 3849 ssextss 4137 eqvinop 4160 opcom 4167 opeqsn 4169 opeqpr 4170 brabsb 4178 opelopabf 4191 opabm 4197 pofun 4229 sotritrieq 4242 uniuni 4367 ordsucim 4411 opeliunxp 4589 xpiundi 4592 brinxp2 4601 ssrel 4622 reliun 4655 cnvuni 4720 dmopab3 4747 opelres 4819 elres 4850 elsnres 4851 intirr 4920 ssrnres 4976 dminxp 4978 dfrel4v 4985 dmsnm 4999 rnco 5040 sb8iota 5090 dffun2 5128 dffun4f 5134 funco 5158 funcnveq 5181 fun11 5185 isarep1 5204 dff1o4 5368 dff1o6 5670 oprabid 5796 mpo2eqb 5873 ralrnmpo 5878 rexrnmpo 5879 opabex3d 6012 opabex3 6013 xporderlem 6121 f1od2 6125 tfr0dm 6212 tfrexlem 6224 frec0g 6287 nnaord 6398 ecid 6485 mptelixpg 6621 elixpsn 6622 mapsnen 6698 xpsnen 6708 xpcomco 6713 xpassen 6717 nqnq0 7242 opelreal 7628 pitoregt0 7650 elnn0 8972 elxnn0 9035 elxr 9556 xrnepnf 9558 elfzuzb 9793 4fvwrd4 9910 elfzo2 9920 resqrexlemsqa 10789 fisumcom2 11200 modfsummod 11220 isprm2 11787 isprm4 11789 ntreq0 12290 txbas 12416 metrest 12664 |
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