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| Mirrors > Home > MPE Home > Th. List > quslem | Structured version Visualization version GIF version | ||
| Description: The function in qusval 17505 is a surjection onto a quotient set. (Contributed by Mario Carneiro, 23-Feb-2015.) |
| Ref | Expression |
|---|---|
| qusval.u | ⊢ (𝜑 → 𝑈 = (𝑅 /s ∼ )) |
| qusval.v | ⊢ (𝜑 → 𝑉 = (Base‘𝑅)) |
| qusval.f | ⊢ 𝐹 = (𝑥 ∈ 𝑉 ↦ [𝑥] ∼ ) |
| qusval.e | ⊢ (𝜑 → ∼ ∈ 𝑊) |
| qusval.r | ⊢ (𝜑 → 𝑅 ∈ 𝑍) |
| Ref | Expression |
|---|---|
| quslem | ⊢ (𝜑 → 𝐹:𝑉–onto→(𝑉 / ∼ )) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | qusval.e | . . . . . 6 ⊢ (𝜑 → ∼ ∈ 𝑊) | |
| 2 | ecexg 8675 | . . . . . 6 ⊢ ( ∼ ∈ 𝑊 → [𝑥] ∼ ∈ V) | |
| 3 | 1, 2 | syl 17 | . . . . 5 ⊢ (𝜑 → [𝑥] ∼ ∈ V) |
| 4 | 3 | ralrimivw 3129 | . . . 4 ⊢ (𝜑 → ∀𝑥 ∈ 𝑉 [𝑥] ∼ ∈ V) |
| 5 | qusval.f | . . . . 5 ⊢ 𝐹 = (𝑥 ∈ 𝑉 ↦ [𝑥] ∼ ) | |
| 6 | 5 | fnmpt 6658 | . . . 4 ⊢ (∀𝑥 ∈ 𝑉 [𝑥] ∼ ∈ V → 𝐹 Fn 𝑉) |
| 7 | 4, 6 | syl 17 | . . 3 ⊢ (𝜑 → 𝐹 Fn 𝑉) |
| 8 | dffn4 6778 | . . 3 ⊢ (𝐹 Fn 𝑉 ↔ 𝐹:𝑉–onto→ran 𝐹) | |
| 9 | 7, 8 | sylib 218 | . 2 ⊢ (𝜑 → 𝐹:𝑉–onto→ran 𝐹) |
| 10 | 5 | rnmpt 5921 | . . . 4 ⊢ ran 𝐹 = {𝑦 ∣ ∃𝑥 ∈ 𝑉 𝑦 = [𝑥] ∼ } |
| 11 | df-qs 8677 | . . . 4 ⊢ (𝑉 / ∼ ) = {𝑦 ∣ ∃𝑥 ∈ 𝑉 𝑦 = [𝑥] ∼ } | |
| 12 | 10, 11 | eqtr4i 2755 | . . 3 ⊢ ran 𝐹 = (𝑉 / ∼ ) |
| 13 | foeq3 6770 | . . 3 ⊢ (ran 𝐹 = (𝑉 / ∼ ) → (𝐹:𝑉–onto→ran 𝐹 ↔ 𝐹:𝑉–onto→(𝑉 / ∼ ))) | |
| 14 | 12, 13 | ax-mp 5 | . 2 ⊢ (𝐹:𝑉–onto→ran 𝐹 ↔ 𝐹:𝑉–onto→(𝑉 / ∼ )) |
| 15 | 9, 14 | sylib 218 | 1 ⊢ (𝜑 → 𝐹:𝑉–onto→(𝑉 / ∼ )) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 = wceq 1540 ∈ wcel 2109 {cab 2707 ∀wral 3044 ∃wrex 3053 Vcvv 3447 ↦ cmpt 5188 ran crn 5639 Fn wfn 6506 –onto→wfo 6509 ‘cfv 6511 (class class class)co 7387 [cec 8669 / cqs 8670 Basecbs 17179 /s cqus 17468 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5251 ax-nul 5261 ax-pr 5387 ax-un 7711 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ral 3045 df-rex 3054 df-rab 3406 df-v 3449 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-nul 4297 df-if 4489 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4872 df-br 5108 df-opab 5170 df-mpt 5189 df-id 5533 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-fun 6513 df-fn 6514 df-fo 6517 df-ec 8673 df-qs 8677 |
| This theorem is referenced by: qusbas 17508 quss 17509 qusaddvallem 17514 qusaddflem 17515 qusaddval 17516 qusaddf 17517 qusmulval 17518 qusmulf 17519 qusgrp2 18990 qusrng 20089 qusring2 20243 znzrhfo 21457 qustps 23609 qustgpopn 24007 qustgplem 24008 qustgphaus 24010 qusker 33320 qusvsval 33323 quslmod 33329 quslmhm 33330 qusdimsum 33624 |
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