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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 2765 | . . . 4 ⊢ (mTC‘𝑇) = (mTC‘𝑇) | |
| 3 | mtyf.y | . . . 4 ⊢ 𝑌 = (mType‘𝑇) | |
| 4 | 1, 2, 3 | mtyf2 35914 | . . 3 ⊢ (𝑇 ∈ mFS → 𝑌:𝑉⟶(mTC‘𝑇)) |
| 5 | ffn 6695 | . . . 4 ⊢ (𝑌:𝑉⟶(mTC‘𝑇) → 𝑌 Fn 𝑉) | |
| 6 | dffn4 6788 | . . . 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 6782 | . . 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 35863 | . . 3 ⊢ 𝐹 = ran 𝑌 |
| 12 | feq3 6675 | . . 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 1563 ∈ wcel 2145 ran crn 5653 Fn wfn 6520 ⟶wf 6521 –onto→wfo 6523 ‘cfv 6525 mVRcmvar 35824 mTypecmty 35825 mVTcmvt 35826 mTCcmtc 35827 mFScmfs 35839 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2737 ax-sep 5251 ax-nul 5261 ax-pr 5395 ax-un 7722 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-ral 3080 df-rex 3090 df-rab 3418 df-v 3459 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-nul 4289 df-if 4484 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4869 df-br 5106 df-opab 5168 df-mpt 5187 df-id 5547 df-xp 5658 df-rel 5659 df-cnv 5660 df-co 5661 df-dm 5662 df-rn 5663 df-res 5664 df-ima 5665 df-iota 6481 df-fun 6527 df-fn 6528 df-f 6529 df-fo 6531 df-fv 6533 df-mvt 35848 df-mfs 35859 |
| This theorem is referenced by: (None) |
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