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Mirrors > Home > MPE Home > Th. List > oteq2 | Structured version Visualization version GIF version |
Description: Equality theorem for ordered triples. (Contributed by NM, 3-Apr-2015.) |
Ref | Expression |
---|---|
oteq2 | ⊢ (𝐴 = 𝐵 → 〈𝐶, 𝐴, 𝐷〉 = 〈𝐶, 𝐵, 𝐷〉) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | opeq2 4806 | . . 3 ⊢ (𝐴 = 𝐵 → 〈𝐶, 𝐴〉 = 〈𝐶, 𝐵〉) | |
2 | 1 | opeq1d 4811 | . 2 ⊢ (𝐴 = 𝐵 → 〈〈𝐶, 𝐴〉, 𝐷〉 = 〈〈𝐶, 𝐵〉, 𝐷〉) |
3 | df-ot 4578 | . 2 ⊢ 〈𝐶, 𝐴, 𝐷〉 = 〈〈𝐶, 𝐴〉, 𝐷〉 | |
4 | df-ot 4578 | . 2 ⊢ 〈𝐶, 𝐵, 𝐷〉 = 〈〈𝐶, 𝐵〉, 𝐷〉 | |
5 | 2, 3, 4 | 3eqtr4g 2883 | 1 ⊢ (𝐴 = 𝐵 → 〈𝐶, 𝐴, 𝐷〉 = 〈𝐶, 𝐵, 𝐷〉) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1537 〈cop 4575 〈cotp 4577 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-rab 3149 df-v 3498 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-nul 4294 df-if 4470 df-sn 4570 df-pr 4572 df-op 4576 df-ot 4578 |
This theorem is referenced by: oteq2d 4818 efgi 18847 efgtf 18850 efgtval 18851 |
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