![]() |
Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > MPE Home > Th. List > treq | Structured version Visualization version GIF version |
Description: Equality theorem for the transitive class predicate. (Contributed by NM, 17-Sep-1993.) |
Ref | Expression |
---|---|
treq | ⊢ (𝐴 = 𝐵 → (Tr 𝐴 ↔ Tr 𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | unieq 4811 | . . . 4 ⊢ (𝐴 = 𝐵 → ∪ 𝐴 = ∪ 𝐵) | |
2 | 1 | sseq1d 3946 | . . 3 ⊢ (𝐴 = 𝐵 → (∪ 𝐴 ⊆ 𝐴 ↔ ∪ 𝐵 ⊆ 𝐴)) |
3 | sseq2 3941 | . . 3 ⊢ (𝐴 = 𝐵 → (∪ 𝐵 ⊆ 𝐴 ↔ ∪ 𝐵 ⊆ 𝐵)) | |
4 | 2, 3 | bitrd 282 | . 2 ⊢ (𝐴 = 𝐵 → (∪ 𝐴 ⊆ 𝐴 ↔ ∪ 𝐵 ⊆ 𝐵)) |
5 | df-tr 5137 | . 2 ⊢ (Tr 𝐴 ↔ ∪ 𝐴 ⊆ 𝐴) | |
6 | df-tr 5137 | . 2 ⊢ (Tr 𝐵 ↔ ∪ 𝐵 ⊆ 𝐵) | |
7 | 4, 5, 6 | 3bitr4g 317 | 1 ⊢ (𝐴 = 𝐵 → (Tr 𝐴 ↔ Tr 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 = wceq 1538 ⊆ wss 3881 ∪ cuni 4800 Tr wtr 5136 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-ext 2770 |
This theorem depends on definitions: df-bi 210 df-an 400 df-ex 1782 df-sb 2070 df-clab 2777 df-cleq 2791 df-clel 2870 df-v 3443 df-in 3888 df-ss 3898 df-uni 4801 df-tr 5137 |
This theorem is referenced by: truni 5150 trint 5152 ordeq 6166 trcl 9154 tz9.1 9155 tz9.1c 9156 tctr 9166 tcmin 9167 tc2 9168 r1tr 9189 r1elssi 9218 tcrank 9297 iswun 10115 tskr1om2 10179 elgrug 10203 grutsk 10233 dfon2lem1 33141 dfon2lem3 33143 dfon2lem4 33144 dfon2lem5 33145 dfon2lem6 33146 dfon2lem7 33147 dfon2lem8 33148 dfon2 33150 dford3lem1 39967 dford3lem2 39968 |
Copyright terms: Public domain | W3C validator |