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Mirrors > Home > ILE Home > Th. List > 3bitr4d | GIF version |
Description: Deduction from transitivity of biconditional. Useful for converting conditional definitions in a formula. (Contributed by NM, 18-Oct-1995.) |
Ref | Expression |
---|---|
3bitr4d.1 | ⊢ (𝜑 → (𝜓 ↔ 𝜒)) |
3bitr4d.2 | ⊢ (𝜑 → (𝜃 ↔ 𝜓)) |
3bitr4d.3 | ⊢ (𝜑 → (𝜏 ↔ 𝜒)) |
Ref | Expression |
---|---|
3bitr4d | ⊢ (𝜑 → (𝜃 ↔ 𝜏)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 3bitr4d.2 | . 2 ⊢ (𝜑 → (𝜃 ↔ 𝜓)) | |
2 | 3bitr4d.1 | . . 3 ⊢ (𝜑 → (𝜓 ↔ 𝜒)) | |
3 | 3bitr4d.3 | . . 3 ⊢ (𝜑 → (𝜏 ↔ 𝜒)) | |
4 | 2, 3 | bitr4d 190 | . 2 ⊢ (𝜑 → (𝜓 ↔ 𝜏)) |
5 | 1, 4 | bitrd 187 | 1 ⊢ (𝜑 → (𝜃 ↔ 𝜏)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ↔ 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: dfbi3dc 1375 xordidc 1377 19.32dc 1657 r19.32vdc 2578 opbrop 4613 fvopab3g 5487 respreima 5541 fmptco 5579 cocan1 5681 cocan2 5682 brtposg 6144 nnmword 6407 swoer 6450 erth 6466 brecop 6512 ecopovsymg 6521 xpdom2 6718 ctssdccl 6989 pitric 7122 ltexpi 7138 ltapig 7139 ltmpig 7140 ltanqg 7201 ltmnqg 7202 enq0breq 7237 genpassl 7325 genpassu 7326 1idprl 7391 1idpru 7392 caucvgprlemcanl 7445 ltasrg 7571 prsrlt 7588 caucvgsrlemoffcau 7599 ltpsrprg 7604 map2psrprg 7606 axpre-ltadd 7687 subsub23 7960 leadd1 8185 lemul1 8348 reapmul1lem 8349 reapmul1 8350 reapadd1 8351 apsym 8361 apadd1 8363 apti 8377 apcon4bid 8379 lediv1 8620 lt2mul2div 8630 lerec 8635 ltdiv2 8638 lediv2 8642 le2msq 8652 avgle1 8953 avgle2 8954 nn01to3 9402 qapne 9424 cnref1o 9433 xleneg 9613 xsubge0 9657 xleaddadd 9663 iooneg 9764 iccneg 9765 iccshftr 9770 iccshftl 9772 iccdil 9774 icccntr 9776 fzsplit2 9823 fzaddel 9832 fzrev 9857 elfzo 9919 fzon 9936 elfzom1b 9999 ioo0 10030 ico0 10032 ioc0 10033 flqlt 10049 negqmod0 10097 frec2uzled 10195 expeq0 10317 nn0opthlem1d 10459 leisorel 10573 cjreb 10631 ltmininf 10999 minclpr 11001 xrmaxlesup 11021 xrltmininf 11032 xrminltinf 11034 tanaddaplem 11434 nndivdvds 11488 moddvds 11491 modmulconst 11514 oddm1even 11561 ltoddhalfle 11579 dvdssq 11708 phiprmpw 11887 cnrest2 12394 cnptoprest 12397 cnptoprest2 12398 lmss 12404 lmff 12407 txlm 12437 ismet2 12512 blres 12592 xmetec 12595 bdbl 12661 metrest 12664 cnbl0 12692 cnblcld 12693 reopnap 12696 bl2ioo 12700 limcdifap 12789 |
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