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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 2760 | . . . 4 ⊢ (mTC‘𝑇) = (mTC‘𝑇) | |
| 3 | mtyf.y | . . . 4 ⊢ 𝑌 = (mType‘𝑇) | |
| 4 | 1, 2, 3 | mtyf2 36213 | . . 3 ⊢ (𝑇 ∈ mFS → 𝑌:𝑉⟶(mTC‘𝑇)) |
| 5 | ffn 6705 | . . . 4 ⊢ (𝑌:𝑉⟶(mTC‘𝑇) → 𝑌 Fn 𝑉) | |
| 6 | dffn4 6798 | . . . 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 6792 | . . 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 36162 | . . 3 ⊢ 𝐹 = ran 𝑌 |
| 12 | feq3 6685 | . . 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 |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1570 ∈ wcel 2145 ran crn 5656 Fn wfn 6530 ⟶wf 6531 –onto→wfo 6533 ‘cfv 6535 mVRcmvar 36123 mTypecmty 36124 mVTcmvt 36125 mTCcmtc 36126 mFScmfs 36138 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5251 ax-nul 5263 ax-pr 5398 ax-un 7742 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5550 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-iota 6491 df-fun 6537 df-fn 6538 df-f 6539 df-fo 6541 df-fv 6543 df-mvt 36147 df-mfs 36158 |
| This theorem is used by: (None) |
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