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| Mirrors > Home > MPE Home > Th. List > fdiagfn | Structured version Visualization version GIF version | ||
| Description: Functionality of the diagonal map. (Contributed by Stefan O'Rear, 24-Jan-2015.) |
| Ref | Expression |
|---|---|
| fdiagfn.f | ⊢ 𝐹 = (𝑥 ∈ 𝐵 ↦ (𝐼 × {𝑥})) |
| Ref | Expression |
|---|---|
| fdiagfn | ⊢ ((𝐵 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊) → 𝐹:𝐵⟶(𝐵 ↑m 𝐼)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fconst6g 6768 | . . . 4 ⊢ (𝑥 ∈ 𝐵 → (𝐼 × {𝑥}):𝐼⟶𝐵) | |
| 2 | 1 | adantl 487 | . . 3 ⊢ (((𝐵 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊) ∧ 𝑥 ∈ 𝐵) → (𝐼 × {𝑥}):𝐼⟶𝐵) |
| 3 | elmapg 8841 | . . . 4 ⊢ ((𝐵 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊) → ((𝐼 × {𝑥}) ∈ (𝐵 ↑m 𝐼) ↔ (𝐼 × {𝑥}):𝐼⟶𝐵)) | |
| 4 | 3 | adantr 486 | . . 3 ⊢ (((𝐵 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊) ∧ 𝑥 ∈ 𝐵) → ((𝐼 × {𝑥}) ∈ (𝐵 ↑m 𝐼) ↔ (𝐼 × {𝑥}):𝐼⟶𝐵)) |
| 5 | 2, 4 | mpbird 260 | . 2 ⊢ (((𝐵 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊) ∧ 𝑥 ∈ 𝐵) → (𝐼 × {𝑥}) ∈ (𝐵 ↑m 𝐼)) |
| 6 | fdiagfn.f | . 2 ⊢ 𝐹 = (𝑥 ∈ 𝐵 ↦ (𝐼 × {𝑥})) | |
| 7 | 5, 6 | fmptd 7110 | 1 ⊢ ((𝐵 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊) → 𝐹:𝐵⟶(𝐵 ↑m 𝐼)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1570 ∈ wcel 2145 {csn 4587 ↦ cmpt 5190 × cxp 5657 ⟶wf 6533 (class class class)co 7416 ↑m cmap 8829 |
| 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 2215 ax-ext 2734 ax-sep 5255 ax-pow 5334 ax-pr 5402 ax-un 7739 |
| 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 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-rab 3415 df-v 3455 df-sbc 3743 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-br 5108 df-opab 5172 df-mpt 5191 df-id 5554 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-fv 6545 df-ov 7419 df-oprab 7420 df-mpo 7421 df-map 8831 |
| This theorem is used by: pwsdiagmhm 18939 |
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