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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 38885 | . . . 4 ⊢ ((𝑅 ⋉ ◡ E ) ↾ 𝐴) = ((𝑅 ↾ 𝐴) ⋉ ◡ E ) | |
| 2 | xrnres2 38886 | . . . 4 ⊢ ((𝑅 ⋉ ◡ E ) ↾ 𝐴) = (𝑅 ⋉ (◡ E ↾ 𝐴)) | |
| 3 | 1, 2 | eqtr3i 2786 | . . 3 ⊢ ((𝑅 ↾ 𝐴) ⋉ ◡ E ) = (𝑅 ⋉ (◡ E ↾ 𝐴)) |
| 4 | 3 | dmeqi 5876 | . 2 ⊢ dom ((𝑅 ↾ 𝐴) ⋉ ◡ E ) = dom (𝑅 ⋉ (◡ E ↾ 𝐴)) |
| 5 | dmxrncnvep 38849 | . 2 ⊢ dom ((𝑅 ↾ 𝐴) ⋉ ◡ E ) = (dom (𝑅 ↾ 𝐴) ∖ {∅}) | |
| 6 | 4, 5 | eqtr3i 2786 | 1 ⊢ dom (𝑅 ⋉ (◡ E ↾ 𝐴)) = (dom (𝑅 ↾ 𝐴) ∖ {∅}) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1559 ∖ cdif 3899 ∅c0 4283 {csn 4579 E cep 5542 ◡ccnv 5642 dom cdm 5643 ↾ cres 5645 ⋉ cxrn 38634 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5243 ax-nul 5253 ax-pr 5387 ax-un 7713 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3076 df-rex 3086 df-rab 3414 df-v 3455 df-sbc 3743 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4478 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-br 5098 df-opab 5160 df-mpt 5179 df-id 5538 df-eprel 5543 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 df-res 5655 df-iota 6472 df-fun 6518 df-fn 6519 df-f 6520 df-fo 6522 df-fv 6524 df-oprab 7395 df-1st 7965 df-2nd 7966 df-xrn 38840 |
| This theorem is referenced by: dmxrncnvepres2 38893 eldmxrncnvepres 38894 eldmxrncnvepres2 38895 |
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