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| Mirrors > Home > MPE Home > Th. List > Mathboxes > dmxrncnvepres | Structured version Visualization version GIF version | ||
| Description: Domain of the range product with restricted converse epsilon relation. (Contributed by Peter Mazsa, 23-Nov-2025.) |
| Ref | Expression |
|---|---|
| dmxrncnvepres | ⊢ dom (𝑅 ⋉ (◡ E ↾ 𝐴)) = (dom (𝑅 ↾ 𝐴) ∖ {∅}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xrnres 39623 | . . . 4 ⊢ ((𝑅 ⋉ ◡ E ) ↾ 𝐴) = ((𝑅 ↾ 𝐴) ⋉ ◡ E ) | |
| 2 | xrnres2 39624 | . . . 4 ⊢ ((𝑅 ⋉ ◡ E ) ↾ 𝐴) = (𝑅 ⋉ (◡ E ↾ 𝐴)) | |
| 3 | 1, 2 | eqtr3i 2788 | . . 3 ⊢ ((𝑅 ↾ 𝐴) ⋉ ◡ E ) = (𝑅 ⋉ (◡ E ↾ 𝐴)) |
| 4 | 3 | dmeqi 5898 | . 2 ⊢ dom ((𝑅 ↾ 𝐴) ⋉ ◡ E ) = dom (𝑅 ⋉ (◡ E ↾ 𝐴)) |
| 5 | dmxrncnvep 39587 | . 2 ⊢ dom ((𝑅 ↾ 𝐴) ⋉ ◡ E ) = (dom (𝑅 ↾ 𝐴) ∖ {∅}) | |
| 6 | 4, 5 | eqtr3i 2788 | 1 ⊢ dom (𝑅 ⋉ (◡ E ↾ 𝐴)) = (dom (𝑅 ↾ 𝐴) ∖ {∅}) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ∖ cdif 4048 ∅c0 4281 {csn 4588 E cep 5557 ◡ccnv 5657 dom cdm 5658 ↾ cres 5660 ⋉ cxrn 39372 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5255 ax-nul 5266 ax-pr 5398 ax-un 7783 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-sbc 3743 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-br 5109 df-opab 5174 df-mpt 5193 df-id 5553 df-eprel 5558 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-iota 6520 df-fun 6568 df-fn 6569 df-f 6570 df-fo 6572 df-fv 6574 df-oprab 7455 df-1st 8035 df-2nd 8036 df-xrn 39578 |
| This theorem is used by: dmxrncnvepres2 39631 eldmxrncnvepres 39632 eldmxrncnvepres2 39633 |
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