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| Mirrors > Home > MPE Home > Th. List > fmptsn | Structured version Visualization version GIF version | ||
| Description: Express a singleton function in maps-to notation. (Contributed by NM, 6-Jun-2006.) (Proof shortened by Andrew Salmon, 22-Oct-2011.) (Revised by Stefan O'Rear, 28-Feb-2015.) |
| Ref | Expression |
|---|---|
| fmptsn | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → {〈𝐴, 𝐵〉} = (𝑥 ∈ {𝐴} ↦ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xpsng 7096 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ({𝐴} × {𝐵}) = {〈𝐴, 𝐵〉}) | |
| 2 | fconstmpt 5696 | . 2 ⊢ ({𝐴} × {𝐵}) = (𝑥 ∈ {𝐴} ↦ 𝐵) | |
| 3 | 1, 2 | eqtr3di 2787 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → {〈𝐴, 𝐵〉} = (𝑥 ∈ {𝐴} ↦ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1542 ∈ wcel 2114 {csn 4582 〈cop 4588 ↦ cmpt 5181 × cxp 5632 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5245 ax-pr 5381 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-reu 3353 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-sn 4583 df-pr 4585 df-op 4589 df-br 5101 df-opab 5163 df-mpt 5182 df-id 5529 df-xp 5640 df-rel 5641 df-cnv 5642 df-co 5643 df-dm 5644 df-rn 5645 df-fun 6504 df-fn 6505 df-f 6506 df-f1 6507 df-fo 6508 df-f1o 6509 |
| This theorem is referenced by: fmptap 7128 ofs1 14907 islindf4 21810 mat1dimscm 22436 istrkg2ld 28549 istrkg2ldOLD 28550 mptprop 32794 esumsnf 34248 ofcs1 34728 signstf0 34752 ptrest 37899 fmptsnxp 45557 rnsnf 45572 |
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