| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > tpf | Structured version Visualization version GIF version | ||
| Description: A function into a (proper) triple. (Contributed by AV, 20-Jul-2025.) |
| Ref | Expression |
|---|---|
| tpf1o.f | ⊢ 𝐹 = (𝑥 ∈ (0..^3) ↦ if(𝑥 = 0, 𝐴, if(𝑥 = 1, 𝐵, 𝐶))) |
| tpf.t | ⊢ 𝑇 = {𝐴, 𝐵, 𝐶} |
| Ref | Expression |
|---|---|
| tpf | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) → 𝐹:(0..^3)⟶𝑇) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | tpid1g 4730 | . . . . . 6 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ {𝐴, 𝐵, 𝐶}) | |
| 2 | 1 | 3ad2ant1 1151 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) → 𝐴 ∈ {𝐴, 𝐵, 𝐶}) |
| 3 | tpid2g 4732 | . . . . . . 7 ⊢ (𝐵 ∈ 𝑉 → 𝐵 ∈ {𝐴, 𝐵, 𝐶}) | |
| 4 | 3 | 3ad2ant2 1152 | . . . . . 6 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) → 𝐵 ∈ {𝐴, 𝐵, 𝐶}) |
| 5 | tpid3g 4733 | . . . . . . 7 ⊢ (𝐶 ∈ 𝑉 → 𝐶 ∈ {𝐴, 𝐵, 𝐶}) | |
| 6 | 5 | 3ad2ant3 1153 | . . . . . 6 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) → 𝐶 ∈ {𝐴, 𝐵, 𝐶}) |
| 7 | 4, 6 | ifcld 4532 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) → if(𝑥 = 1, 𝐵, 𝐶) ∈ {𝐴, 𝐵, 𝐶}) |
| 8 | 2, 7 | ifcld 4532 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) → if(𝑥 = 0, 𝐴, if(𝑥 = 1, 𝐵, 𝐶)) ∈ {𝐴, 𝐵, 𝐶}) |
| 9 | tpf.t | . . . 4 ⊢ 𝑇 = {𝐴, 𝐵, 𝐶} | |
| 10 | 8, 9 | eleqtrrdi 2875 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) → if(𝑥 = 0, 𝐴, if(𝑥 = 1, 𝐵, 𝐶)) ∈ 𝑇) |
| 11 | 10 | adantr 486 | . 2 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) ∧ 𝑥 ∈ (0..^3)) → if(𝑥 = 0, 𝐴, if(𝑥 = 1, 𝐵, 𝐶)) ∈ 𝑇) |
| 12 | tpf1o.f | . 2 ⊢ 𝐹 = (𝑥 ∈ (0..^3) ↦ if(𝑥 = 0, 𝐴, if(𝑥 = 1, 𝐵, 𝐶))) | |
| 13 | 11, 12 | fmptd 7138 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) → 𝐹:(0..^3)⟶𝑇) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ w3a 1103 = wceq 1570 ∈ wcel 2147 ifcif 4485 {ctp 4592 ↦ cmpt 5189 ⟶wf 6554 (class class class)co 7443 0cc0 11227 1c1 11228 3c3 12425 ..^cfzo 13815 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5252 ax-pr 5395 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-tp 4593 df-op 4839 df-br 5107 df-opab 5171 df-mpt 5190 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-fun 6560 df-fn 6561 df-f 6562 |
| This theorem is used by: tpfo 14672 |
| Copyright terms: Public domain | W3C validator |