Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > dfmptg | GIF version |
Description: Alternate definition for the maps-to notation df-mpt 4052 (which requires that 𝐵 be a set). (Contributed by Jim Kingdon, 9-Jan-2019.) |
Ref | Expression |
---|---|
dfmptg | ⊢ (∀𝑥 ∈ 𝐴 𝐵 ∈ 𝑉 → (𝑥 ∈ 𝐴 ↦ 𝐵) = ∪ 𝑥 ∈ 𝐴 {〈𝑥, 𝐵〉}) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfmpt3 5320 | . 2 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = ∪ 𝑥 ∈ 𝐴 ({𝑥} × {𝐵}) | |
2 | vex 2733 | . . . . 5 ⊢ 𝑥 ∈ V | |
3 | xpsng 5671 | . . . . 5 ⊢ ((𝑥 ∈ V ∧ 𝐵 ∈ 𝑉) → ({𝑥} × {𝐵}) = {〈𝑥, 𝐵〉}) | |
4 | 2, 3 | mpan 422 | . . . 4 ⊢ (𝐵 ∈ 𝑉 → ({𝑥} × {𝐵}) = {〈𝑥, 𝐵〉}) |
5 | 4 | ralimi 2533 | . . 3 ⊢ (∀𝑥 ∈ 𝐴 𝐵 ∈ 𝑉 → ∀𝑥 ∈ 𝐴 ({𝑥} × {𝐵}) = {〈𝑥, 𝐵〉}) |
6 | iuneq2 3889 | . . 3 ⊢ (∀𝑥 ∈ 𝐴 ({𝑥} × {𝐵}) = {〈𝑥, 𝐵〉} → ∪ 𝑥 ∈ 𝐴 ({𝑥} × {𝐵}) = ∪ 𝑥 ∈ 𝐴 {〈𝑥, 𝐵〉}) | |
7 | 5, 6 | syl 14 | . 2 ⊢ (∀𝑥 ∈ 𝐴 𝐵 ∈ 𝑉 → ∪ 𝑥 ∈ 𝐴 ({𝑥} × {𝐵}) = ∪ 𝑥 ∈ 𝐴 {〈𝑥, 𝐵〉}) |
8 | 1, 7 | eqtrid 2215 | 1 ⊢ (∀𝑥 ∈ 𝐴 𝐵 ∈ 𝑉 → (𝑥 ∈ 𝐴 ↦ 𝐵) = ∪ 𝑥 ∈ 𝐴 {〈𝑥, 𝐵〉}) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1348 ∈ wcel 2141 ∀wral 2448 Vcvv 2730 {csn 3583 〈cop 3586 ∪ ciun 3873 ↦ cmpt 4050 × cxp 4609 |
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-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-14 2144 ax-ext 2152 ax-sep 4107 ax-pow 4160 ax-pr 4194 |
This theorem depends on definitions: df-bi 116 df-3an 975 df-tru 1351 df-nf 1454 df-sb 1756 df-eu 2022 df-mo 2023 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ral 2453 df-rex 2454 df-reu 2455 df-v 2732 df-sbc 2956 df-csb 3050 df-un 3125 df-in 3127 df-ss 3134 df-pw 3568 df-sn 3589 df-pr 3590 df-op 3592 df-iun 3875 df-br 3990 df-opab 4051 df-mpt 4052 df-id 4278 df-xp 4617 df-rel 4618 df-cnv 4619 df-co 4620 df-dm 4621 df-rn 4622 df-fun 5200 df-fn 5201 df-f 5202 df-f1 5203 df-fo 5204 df-f1o 5205 |
This theorem is referenced by: fnasrng 5676 |
Copyright terms: Public domain | W3C validator |