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Related theorems GIF version |
| Description: Equality implies equivalence of equalities. |
| Ref | Expression |
|---|---|
| eqeq2 | ⊢ (A = B → (C = A ↔ C = B)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqeq1 1484 | . 2 ⊢ (A = B → (A = C ↔ B = C)) | |
| 2 | eqcom 1480 | . 2 ⊢ (C = A ↔ A = C) | |
| 3 | eqcom 1480 | . 2 ⊢ (C = B ↔ B = C) | |
| 4 | 1, 2, 3 | 3bitr4g 557 | 1 ⊢ (A = B → (C = A ↔ C = B)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 3 ↔ wb 146 = wceq 958 |
| This theorem is referenced by: eqeq2i 1488 eqeq2d 1489 eqeq12 1490 eleq1 1537 neeq2 1594 eqvinc 1886 alexeq 1888 ceqex 1889 moeq3 1924 mo2icl 1926 moi2 1927 moi 1928 eqif 2381 sneq 2421 preqr1 2485 prel12 2488 dtru 2778 opthg 2794 solin 2863 so 2870 euuni 2887 reuuni2f 2889 dfwe2 2941 ordequn 3086 findsg 3163 tfindsg 3168 ideqg 3282 resieq 3382 funopg 3553 fneq2 3589 foeq3 3676 tz6.12f 3744 tz6.12i 3747 funbrfv 3756 funopfvg 3758 fnbrfvb 3759 funbrfvbg 3763 fvelima 3770 fvopab2 3797 fconst5 3854 f1fvf 3881 f1fveq 3882 isowe 3909 f1oweALT 3912 caoprcan 4061 oawordeu 4195 eceqopreq 4319 2dom 4433 fundmen 4434 nneneq 4518 aceq5 4750 alephfp 4911 cardcf 4923 cfeq0 4926 ltsopq 5087 ltexpq 5092 halfpq 5094 ltsosr 5215 map2psrpr 5232 ltsor 5273 addcant 5364 subvalt 5369 subadd 5383 subaddt 5387 neg11t 5421 mulcant2 5700 mulcant2OLD 5701 divval 5716 divmul 5717 divmult 5719 div11t 5766 rec11 5780 redivcl 5800 nnleltp1t 5956 nn0ind-raph 6216 sq11t 6630 sqeqort 6650 nn0opth2t 6669 crut 6739 replimt 6762 climuni 7099 efcltlem2 7305 reef11t 7409 reeff1olem2 7425 acdc3 7488 acdc5 7494 infpn2 7510 meteq0 7809 dscmet 7915 isgrpi 8039 grpidinv2 8056 isgrp2i 8072 ghgrpilem3 8131 cosh111t 8712 efifolem1 8717 efifolem6 8722 hvsubeq0t 8930 hvaddcant 8932 hvsubaddt 8939 normsub0t 8998 hlimuni 9104 occllem5 9172 omls 9241 pjomlt 9264 nonbool 9591 pj11t 9654 lnopeqt 9929 nmopunt 9934 rnbra 10035 pjclem4a 10121 pj3lem1 10129 strlem4 10176 hstrlem4 10184 jplem1 10190 superpos 10276 ghomf1olem 10391 fiiu 10444 hmeogrp 10524 cmpida 10678 cmpidb 10679 ishomb 10687 ismonb2 10711 cmpmon 10714 isepib2 10721 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-gen 965 ax-17 973 ax-4 975 ax-5o 977 ax-ext 1462 |
| This theorem depends on definitions: df-bi 147 df-an 225 df-cleq 1472 |