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Mirrors > Home > ILE Home > Th. List > mapsnf1o | GIF version |
Description: A bijection between a set and single-point functions to it. (Contributed by Stefan O'Rear, 24-Jan-2015.) |
Ref | Expression |
---|---|
ixpsnf1o.f | ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ ({𝐼} × {𝑥})) |
Ref | Expression |
---|---|
mapsnf1o | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊) → 𝐹:𝐴–1-1-onto→(𝐴 ↑𝑚 {𝐼})) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ixpsnf1o.f | . . . 4 ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ ({𝐼} × {𝑥})) | |
2 | 1 | ixpsnf1o 6702 | . . 3 ⊢ (𝐼 ∈ 𝑊 → 𝐹:𝐴–1-1-onto→X𝑦 ∈ {𝐼}𝐴) |
3 | 2 | adantl 275 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊) → 𝐹:𝐴–1-1-onto→X𝑦 ∈ {𝐼}𝐴) |
4 | snexg 4163 | . . . 4 ⊢ (𝐼 ∈ 𝑊 → {𝐼} ∈ V) | |
5 | simpl 108 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊) → 𝐴 ∈ 𝑉) | |
6 | ixpconstg 6673 | . . . . 5 ⊢ (({𝐼} ∈ V ∧ 𝐴 ∈ 𝑉) → X𝑦 ∈ {𝐼}𝐴 = (𝐴 ↑𝑚 {𝐼})) | |
7 | 6 | eqcomd 2171 | . . . 4 ⊢ (({𝐼} ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐴 ↑𝑚 {𝐼}) = X𝑦 ∈ {𝐼}𝐴) |
8 | 4, 5, 7 | syl2an2 584 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊) → (𝐴 ↑𝑚 {𝐼}) = X𝑦 ∈ {𝐼}𝐴) |
9 | f1oeq3 5423 | . . 3 ⊢ ((𝐴 ↑𝑚 {𝐼}) = X𝑦 ∈ {𝐼}𝐴 → (𝐹:𝐴–1-1-onto→(𝐴 ↑𝑚 {𝐼}) ↔ 𝐹:𝐴–1-1-onto→X𝑦 ∈ {𝐼}𝐴)) | |
10 | 8, 9 | syl 14 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊) → (𝐹:𝐴–1-1-onto→(𝐴 ↑𝑚 {𝐼}) ↔ 𝐹:𝐴–1-1-onto→X𝑦 ∈ {𝐼}𝐴)) |
11 | 3, 10 | mpbird 166 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊) → 𝐹:𝐴–1-1-onto→(𝐴 ↑𝑚 {𝐼})) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 = wceq 1343 ∈ wcel 2136 Vcvv 2726 {csn 3576 ↦ cmpt 4043 × cxp 4602 –1-1-onto→wf1o 5187 (class class class)co 5842 ↑𝑚 cmap 6614 Xcixp 6664 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-13 2138 ax-14 2139 ax-ext 2147 ax-sep 4100 ax-pow 4153 ax-pr 4187 ax-un 4411 ax-setind 4514 |
This theorem depends on definitions: df-bi 116 df-3an 970 df-tru 1346 df-fal 1349 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ne 2337 df-ral 2449 df-rex 2450 df-reu 2451 df-v 2728 df-sbc 2952 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-br 3983 df-opab 4044 df-mpt 4045 df-id 4271 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-rn 4615 df-res 4616 df-ima 4617 df-iota 5153 df-fun 5190 df-fn 5191 df-f 5192 df-f1 5193 df-fo 5194 df-f1o 5195 df-fv 5196 df-ov 5845 df-oprab 5846 df-mpo 5847 df-map 6616 df-ixp 6665 |
This theorem is referenced by: (None) |
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