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| Mirrors > Home > ILE Home > Th. List > bicomi | GIF version | ||
| Description: Inference from commutative law for logical equivalence. (Contributed by NM, 5-Aug-1993.) (Revised by NM, 16-Sep-2013.) |
| Ref | Expression |
|---|---|
| bicomi.1 | ⊢ (𝜑 ↔ 𝜓) |
| Ref | Expression |
|---|---|
| bicomi | ⊢ (𝜓 ↔ 𝜑) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bicomi.1 | . 2 ⊢ (𝜑 ↔ 𝜓) | |
| 2 | bicom1 131 | . 2 ⊢ ((𝜑 ↔ 𝜓) → (𝜓 ↔ 𝜑)) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ (𝜓 ↔ 𝜑) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ↔ wb 105 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 |
| This proof depends on definitions: df-bi 117 |
| This theorem is used by: biimpri 133 bitr2i 185 bitr3i 186 bitr4i 187 bitr3id 194 bitr3di 195 bitr4di 198 bitr4id 199 pm5.41 251 anidm 400 an21 475 pm4.87 563 anabs1 578 anabs7 580 an43 594 pm4.76 612 mtbir 682 sylnibr 688 sylnbir 690 xchnxbir 692 xchbinxr 694 nbn 711 pm4.25 770 pm4.56 792 pm4.77 811 pm3.2an3 1207 syl3anbr 1322 3an6 1363 truan 1419 truimfal 1459 nottru 1462 sbid 1827 sb10f 2055 cleljust 2215 eqabdv 2369 nfabdw 2411 necon3bbii 2457 rspc2gv 2942 alexeq 2952 ceqsrexbv 2957 clel2 2959 clel4 2962 dfsbcq2 3054 cbvreucsf 3212 dfdif3 3339 raldifb 3369 difab 3500 un0 3556 in0 3557 ss0b 3562 rexdifpr 3737 snssb 3848 snssg 3849 iindif2m 4080 epse 4489 abnex 4595 uniuni 4599 elco 4948 cotr 5172 issref 5173 mptpreima 5284 ralrnmpt 5853 rexrnmpt 5854 eroveu 6904 mapsnend 7103 wrd2ind 11517 fprodseq 12375 issrg 14376 toptopon 15244 xmeterval 15661 txmetcnp 15744 dedekindicclemicc 15858 eldvap 15908 fsumdvdsmul 16285 isclwwlk 16840 iseupthf1o 16894 eupth2lem1 16904 bdeq 17054 bd0r 17056 bdcriota 17114 bj-d0clsepcl 17156 bj-dfom 17164 alsanmo 17358 ralsanmo 17359 alsralrex 17360 alsraln0m 17361 |
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