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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 2739 | . . . 4 ⊢ (mTC‘𝑇) = (mTC‘𝑇) | |
| 3 | mtyf.y | . . . 4 ⊢ 𝑌 = (mType‘𝑇) | |
| 4 | 1, 2, 3 | mtyf2 35788 | . . 3 ⊢ (𝑇 ∈ mFS → 𝑌:𝑉⟶(mTC‘𝑇)) |
| 5 | ffn 6656 | . . . 4 ⊢ (𝑌:𝑉⟶(mTC‘𝑇) → 𝑌 Fn 𝑉) | |
| 6 | dffn4 6746 | . . . 4 ⊢ (𝑌 Fn 𝑉 ↔ 𝑌:𝑉–onto→ran 𝑌) | |
| 7 | 5, 6 | sylib 219 | . . 3 ⊢ (𝑌:𝑉⟶(mTC‘𝑇) → 𝑌:𝑉–onto→ran 𝑌) |
| 8 | fof 6740 | . . 3 ⊢ (𝑌:𝑉–onto→ran 𝑌 → 𝑌:𝑉⟶ran 𝑌) | |
| 9 | 4, 7, 8 | 3syl 18 | . 2 ⊢ (𝑇 ∈ mFS → 𝑌:𝑉⟶ran 𝑌) |
| 10 | mtyf.f | . . . 4 ⊢ 𝐹 = (mVT‘𝑇) | |
| 11 | 10, 3 | mvtval 35737 | . . 3 ⊢ 𝐹 = ran 𝑌 |
| 12 | feq3 6636 | . . 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 235 | 1 ⊢ (𝑇 ∈ mFS → 𝑌:𝑉⟶𝐹) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 207 = wceq 1547 ∈ wcel 2119 ran crn 5620 Fn wfn 6481 ⟶wf 6482 –onto→wfo 6484 ‘cfv 6486 mVRcmvar 35698 mTypecmty 35699 mVTcmvt 35700 mTCcmtc 35701 mFScmfs 35713 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-sep 5219 ax-nul 5229 ax-pr 5363 ax-un 7679 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4263 df-if 4456 df-sn 4557 df-pr 4559 df-op 4563 df-uni 4840 df-br 5074 df-opab 5136 df-mpt 5155 df-id 5514 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-fo 6492 df-fv 6494 df-mvt 35722 df-mfs 35733 |
| This theorem is referenced by: (None) |
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