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| Mirrors > Home > MPE Home > Th. List > Mathboxes > qmapex | Structured version Visualization version GIF version | ||
| Description: Quotient map exists if 𝑅 exists. Type-safety: ensures QMap is a set under the standard "relation sethood" hypothesis. (Contributed by Peter Mazsa, 12-Feb-2026.) |
| Ref | Expression |
|---|---|
| qmapex | ⊢ (𝑅 ∈ 𝑉 → QMap 𝑅 ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-qmap 39123 | . 2 ⊢ QMap 𝑅 = (𝑥 ∈ dom 𝑅 ↦ [𝑥]𝑅) | |
| 2 | dmexg 7896 | . . 3 ⊢ (𝑅 ∈ 𝑉 → dom 𝑅 ∈ V) | |
| 3 | 2 | mptexd 7222 | . 2 ⊢ (𝑅 ∈ 𝑉 → (𝑥 ∈ dom 𝑅 ↦ [𝑥]𝑅) ∈ V) |
| 4 | 1, 3 | eqeltrid 2866 | 1 ⊢ (𝑅 ∈ 𝑉 → QMap 𝑅 ∈ V) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2142 Vcvv 3454 ↦ cmpt 5191 dom cdm 5660 [cec 8690 QMap cqmap 38852 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-rep 5237 ax-sep 5256 ax-nul 5268 ax-pr 5403 ax-un 7734 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-nf 1813 df-sb 2096 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-reu 3369 df-rab 3416 df-v 3456 df-sbc 3744 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4487 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-iun 4957 df-br 5109 df-opab 5173 df-mpt 5192 df-id 5555 df-xp 5666 df-rel 5667 df-cnv 5668 df-co 5669 df-dm 5670 df-rn 5671 df-res 5672 df-ima 5673 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-qmap 39123 |
| This theorem is used by: qmapeldisjs 39502 eldisjs7 39618 |
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