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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 38746 | . . . 4 ⊢ ((𝑅 ⋉ ◡ E ) ↾ 𝐴) = ((𝑅 ↾ 𝐴) ⋉ ◡ E ) | |
| 2 | xrnres2 38747 | . . . 4 ⊢ ((𝑅 ⋉ ◡ E ) ↾ 𝐴) = (𝑅 ⋉ (◡ E ↾ 𝐴)) | |
| 3 | 1, 2 | eqtr3i 2761 | . . 3 ⊢ ((𝑅 ↾ 𝐴) ⋉ ◡ E ) = (𝑅 ⋉ (◡ E ↾ 𝐴)) |
| 4 | 3 | dmeqi 5859 | . 2 ⊢ dom ((𝑅 ↾ 𝐴) ⋉ ◡ E ) = dom (𝑅 ⋉ (◡ E ↾ 𝐴)) |
| 5 | dmxrncnvep 38710 | . 2 ⊢ dom ((𝑅 ↾ 𝐴) ⋉ ◡ E ) = (dom (𝑅 ↾ 𝐴) ∖ {∅}) | |
| 6 | 4, 5 | eqtr3i 2761 | 1 ⊢ dom (𝑅 ⋉ (◡ E ↾ 𝐴)) = (dom (𝑅 ↾ 𝐴) ∖ {∅}) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1542 ∖ cdif 3886 ∅c0 4273 {csn 4567 E cep 5530 ◡ccnv 5630 dom cdm 5631 ↾ cres 5633 ⋉ cxrn 38495 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-sep 5231 ax-nul 5241 ax-pr 5375 ax-un 7689 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-sbc 3729 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-mpt 5167 df-id 5526 df-eprel 5531 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-fo 6504 df-fv 6506 df-oprab 7371 df-1st 7942 df-2nd 7943 df-xrn 38701 |
| This theorem is referenced by: dmxrncnvepres2 38754 eldmxrncnvepres 38755 eldmxrncnvepres2 38756 |
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