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| Mirrors > Home > MPE Home > Th. List > Mathboxes > mtyf | Structured version Visualization version GIF version | ||
| Description: The type function maps variables to variable typecodes. (Contributed by Mario Carneiro, 18-Jul-2016.) |
| Ref | Expression |
|---|---|
| mtyf.v | ⊢ 𝑉 = (mVR‘𝑇) |
| mtyf.f | ⊢ 𝐹 = (mVT‘𝑇) |
| mtyf.y | ⊢ 𝑌 = (mType‘𝑇) |
| Ref | Expression |
|---|---|
| mtyf | ⊢ (𝑇 ∈ mFS → 𝑌:𝑉⟶𝐹) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | mtyf.v | . . . 4 ⊢ 𝑉 = (mVR‘𝑇) | |
| 2 | eqid 2769 | . . . 4 ⊢ (mTC‘𝑇) = (mTC‘𝑇) | |
| 3 | mtyf.y | . . . 4 ⊢ 𝑌 = (mType‘𝑇) | |
| 4 | 1, 2, 3 | mtyf2 35976 | . . 3 ⊢ (𝑇 ∈ mFS → 𝑌:𝑉⟶(mTC‘𝑇)) |
| 5 | ffn 6706 | . . . 4 ⊢ (𝑌:𝑉⟶(mTC‘𝑇) → 𝑌 Fn 𝑉) | |
| 6 | dffn4 6799 | . . . 4 ⊢ (𝑌 Fn 𝑉 ↔ 𝑌:𝑉–onto→ran 𝑌) | |
| 7 | 5, 6 | sylib 221 | . . 3 ⊢ (𝑌:𝑉⟶(mTC‘𝑇) → 𝑌:𝑉–onto→ran 𝑌) |
| 8 | fof 6793 | . . 3 ⊢ (𝑌:𝑉–onto→ran 𝑌 → 𝑌:𝑉⟶ran 𝑌) | |
| 9 | 4, 7, 8 | 3syl 19 | . 2 ⊢ (𝑇 ∈ mFS → 𝑌:𝑉⟶ran 𝑌) |
| 10 | mtyf.f | . . . 4 ⊢ 𝐹 = (mVT‘𝑇) | |
| 11 | 10, 3 | mvtval 35925 | . . 3 ⊢ 𝐹 = ran 𝑌 |
| 12 | feq3 6686 | . . 3 ⊢ (𝐹 = ran 𝑌 → (𝑌:𝑉⟶𝐹 ↔ 𝑌:𝑉⟶ran 𝑌)) | |
| 13 | 11, 12 | ax-mp 5 | . 2 ⊢ (𝑌:𝑉⟶𝐹 ↔ 𝑌:𝑉⟶ran 𝑌) |
| 14 | 9, 13 | sylibr 237 | 1 ⊢ (𝑇 ∈ mFS → 𝑌:𝑉⟶𝐹) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 = wceq 1567 ∈ wcel 2149 ran crn 5663 Fn wfn 6532 ⟶wf 6533 –onto→wfo 6535 ‘cfv 6537 mVRcmvar 35886 mTypecmty 35887 mVTcmvt 35888 mTCcmtc 35889 mFScmfs 35901 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5261 ax-nul 5271 ax-pr 5405 ax-un 7733 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-opab 5178 df-mpt 5197 df-id 5557 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-fo 6543 df-fv 6545 df-mvt 35910 df-mfs 35921 |
| This theorem is referenced by: (None) |
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