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Mirrors > Home > MPE Home > Th. List > weeq1 | Structured version Visualization version GIF version |
Description: Equality theorem for the well-ordering predicate. (Contributed by NM, 9-Mar-1997.) |
Ref | Expression |
---|---|
weeq1 | ⊢ (𝑅 = 𝑆 → (𝑅 We 𝐴 ↔ 𝑆 We 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | freq1 5524 | . . 3 ⊢ (𝑅 = 𝑆 → (𝑅 Fr 𝐴 ↔ 𝑆 Fr 𝐴)) | |
2 | soeq1 5493 | . . 3 ⊢ (𝑅 = 𝑆 → (𝑅 Or 𝐴 ↔ 𝑆 Or 𝐴)) | |
3 | 1, 2 | anbi12d 632 | . 2 ⊢ (𝑅 = 𝑆 → ((𝑅 Fr 𝐴 ∧ 𝑅 Or 𝐴) ↔ (𝑆 Fr 𝐴 ∧ 𝑆 Or 𝐴))) |
4 | df-we 5515 | . 2 ⊢ (𝑅 We 𝐴 ↔ (𝑅 Fr 𝐴 ∧ 𝑅 Or 𝐴)) | |
5 | df-we 5515 | . 2 ⊢ (𝑆 We 𝐴 ↔ (𝑆 Fr 𝐴 ∧ 𝑆 Or 𝐴)) | |
6 | 3, 4, 5 | 3bitr4g 316 | 1 ⊢ (𝑅 = 𝑆 → (𝑅 We 𝐴 ↔ 𝑆 We 𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 = wceq 1533 Or wor 5472 Fr wfr 5510 We wwe 5512 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-ext 2793 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-ex 1777 df-cleq 2814 df-clel 2893 df-ral 3143 df-rex 3144 df-br 5066 df-po 5473 df-so 5474 df-fr 5513 df-we 5515 |
This theorem is referenced by: oieq1 8975 hartogslem1 9005 wemapwe 9159 infxpenlem 9438 dfac8b 9456 ac10ct 9459 fpwwe2cbv 10051 fpwwe2lem2 10053 fpwwe2lem5 10055 fpwwecbv 10065 fpwwelem 10066 canthnumlem 10069 canthwelem 10071 canthwe 10072 canthp1lem2 10074 pwfseqlem4a 10082 pwfseqlem4 10083 ltbwe 20252 vitali 24213 fin2so 34878 weeq12d 39638 dnwech 39646 aomclem5 39656 aomclem6 39657 aomclem7 39658 |
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