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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 39173 | . . . 4 ⊢ ((𝑅 ⋉ ◡ E ) ↾ 𝐴) = ((𝑅 ↾ 𝐴) ⋉ ◡ E ) | |
| 2 | xrnres2 39174 | . . . 4 ⊢ ((𝑅 ⋉ ◡ E ) ↾ 𝐴) = (𝑅 ⋉ (◡ E ↾ 𝐴)) | |
| 3 | 1, 2 | eqtr3i 2785 | . . 3 ⊢ ((𝑅 ↾ 𝐴) ⋉ ◡ E ) = (𝑅 ⋉ (◡ E ↾ 𝐴)) |
| 4 | 3 | dmeqi 5888 | . 2 ⊢ dom ((𝑅 ↾ 𝐴) ⋉ ◡ E ) = dom (𝑅 ⋉ (◡ E ↾ 𝐴)) |
| 5 | dmxrncnvep 39137 | . 2 ⊢ dom ((𝑅 ↾ 𝐴) ⋉ ◡ E ) = (dom (𝑅 ↾ 𝐴) ∖ {∅}) | |
| 6 | 4, 5 | eqtr3i 2785 | 1 ⊢ dom (𝑅 ⋉ (◡ E ↾ 𝐴)) = (dom (𝑅 ↾ 𝐴) ∖ {∅}) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ∖ cdif 3896 ∅c0 4279 {csn 4584 E cep 5554 ◡ccnv 5654 dom cdm 5655 ↾ cres 5657 ⋉ cxrn 38922 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5251 ax-nul 5263 ax-pr 5398 ax-un 7736 |
| 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 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-sbc 3740 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5550 df-eprel 5555 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-fo 6539 df-fv 6541 df-oprab 7417 df-1st 7986 df-2nd 7987 df-xrn 39128 |
| This theorem is used by: dmxrncnvepres2 39181 eldmxrncnvepres 39182 eldmxrncnvepres2 39183 |
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