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Mirrors > Home > MPE Home > Th. List > quslem | Structured version Visualization version GIF version |
Description: The function in qusval 17253 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 8502 | . . . . . 6 ⊢ ( ∼ ∈ 𝑊 → [𝑥] ∼ ∈ V) | |
3 | 1, 2 | syl 17 | . . . . 5 ⊢ (𝜑 → [𝑥] ∼ ∈ V) |
4 | 3 | ralrimivw 3104 | . . . 4 ⊢ (𝜑 → ∀𝑥 ∈ 𝑉 [𝑥] ∼ ∈ V) |
5 | qusval.f | . . . . 5 ⊢ 𝐹 = (𝑥 ∈ 𝑉 ↦ [𝑥] ∼ ) | |
6 | 5 | fnmpt 6573 | . . . 4 ⊢ (∀𝑥 ∈ 𝑉 [𝑥] ∼ ∈ V → 𝐹 Fn 𝑉) |
7 | 4, 6 | syl 17 | . . 3 ⊢ (𝜑 → 𝐹 Fn 𝑉) |
8 | dffn4 6694 | . . 3 ⊢ (𝐹 Fn 𝑉 ↔ 𝐹:𝑉–onto→ran 𝐹) | |
9 | 7, 8 | sylib 217 | . 2 ⊢ (𝜑 → 𝐹:𝑉–onto→ran 𝐹) |
10 | 5 | rnmpt 5864 | . . . 4 ⊢ ran 𝐹 = {𝑦 ∣ ∃𝑥 ∈ 𝑉 𝑦 = [𝑥] ∼ } |
11 | df-qs 8504 | . . . 4 ⊢ (𝑉 / ∼ ) = {𝑦 ∣ ∃𝑥 ∈ 𝑉 𝑦 = [𝑥] ∼ } | |
12 | 10, 11 | eqtr4i 2769 | . . 3 ⊢ ran 𝐹 = (𝑉 / ∼ ) |
13 | foeq3 6686 | . . 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 217 | 1 ⊢ (𝜑 → 𝐹:𝑉–onto→(𝑉 / ∼ )) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 = wceq 1539 ∈ wcel 2106 {cab 2715 ∀wral 3064 ∃wrex 3065 Vcvv 3432 ↦ cmpt 5157 ran crn 5590 Fn wfn 6428 –onto→wfo 6431 ‘cfv 6433 (class class class)co 7275 [cec 8496 / cqs 8497 Basecbs 16912 /s cqus 17216 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5223 ax-nul 5230 ax-pr 5352 ax-un 7588 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ral 3069 df-rex 3070 df-rab 3073 df-v 3434 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-nul 4257 df-if 4460 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-br 5075 df-opab 5137 df-mpt 5158 df-id 5489 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-fun 6435 df-fn 6436 df-fo 6439 df-ec 8500 df-qs 8504 |
This theorem is referenced by: qusbas 17256 quss 17257 qusaddvallem 17262 qusaddflem 17263 qusaddval 17264 qusaddf 17265 qusmulval 17266 qusmulf 17267 qusgrp2 18693 qusring2 19859 znzrhfo 20755 qustps 22873 qustgpopn 23271 qustgplem 23272 qustgphaus 23274 qusker 31549 qusscaval 31552 quslmod 31554 quslmhm 31555 qusdimsum 31709 |
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