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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 4487 abnex 4593 uniuni 4597 elco 4946 cotr 5169 issref 5170 mptpreima 5281 ralrnmpt 5850 rexrnmpt 5851 eroveu 6900 mapsnend 7099 wrd2ind 11495 fprodseq 12350 issrg 14269 toptopon 15119 xmeterval 15536 txmetcnp 15619 dedekindicclemicc 15733 eldvap 15783 fsumdvdsmul 16105 isclwwlk 16635 iseupthf1o 16689 eupth2lem1 16699 bdeq 16849 bd0r 16851 bdcriota 16909 bj-d0clsepcl 16951 bj-dfom 16959 alsanmo 17151 ralsanmo 17152 alsralrex 17153 alsraln0m 17154 |
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