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Mirrors > Home > MPE Home > Th. List > ertr4d | Structured version Visualization version GIF version |
Description: A transitivity relation for equivalences. (Contributed by Mario Carneiro, 9-Jul-2014.) |
Ref | Expression |
---|---|
ersymb.1 | ⊢ (𝜑 → 𝑅 Er 𝑋) |
ertr4d.5 | ⊢ (𝜑 → 𝐴𝑅𝐵) |
ertr4d.6 | ⊢ (𝜑 → 𝐶𝑅𝐵) |
Ref | Expression |
---|---|
ertr4d | ⊢ (𝜑 → 𝐴𝑅𝐶) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ersymb.1 | . 2 ⊢ (𝜑 → 𝑅 Er 𝑋) | |
2 | ertr4d.5 | . 2 ⊢ (𝜑 → 𝐴𝑅𝐵) | |
3 | ertr4d.6 | . . 3 ⊢ (𝜑 → 𝐶𝑅𝐵) | |
4 | 1, 3 | ersym 8290 | . 2 ⊢ (𝜑 → 𝐵𝑅𝐶) |
5 | 1, 2, 4 | ertrd 8294 | 1 ⊢ (𝜑 → 𝐴𝑅𝐶) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 class class class wbr 5057 Er wer 8275 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1787 ax-4 1801 ax-5 1902 ax-6 1961 ax-7 2006 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2151 ax-12 2167 ax-ext 2790 ax-sep 5194 ax-nul 5201 ax-pr 5320 |
This theorem depends on definitions: df-bi 208 df-an 397 df-or 842 df-3an 1081 df-tru 1531 df-ex 1772 df-nf 1776 df-sb 2061 df-mo 2615 df-eu 2647 df-clab 2797 df-cleq 2811 df-clel 2890 df-nfc 2960 df-ral 3140 df-rex 3141 df-rab 3144 df-v 3494 df-dif 3936 df-un 3938 df-in 3940 df-ss 3949 df-nul 4289 df-if 4464 df-sn 4558 df-pr 4560 df-op 4564 df-br 5058 df-opab 5120 df-xp 5554 df-rel 5555 df-cnv 5556 df-co 5557 df-er 8278 |
This theorem is referenced by: erref 8298 erdisj 8330 nqereu 10339 nqereq 10345 efgredeu 18807 pi1xfr 23586 pi1xfrcnvlem 23587 |
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