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| Mirrors > Home > MPE Home > Th. List > fnsng | Structured version Visualization version GIF version | ||
| Description: Functionality and domain of the singleton of an ordered pair. (Contributed by Mario Carneiro, 30-Apr-2015.) |
| Ref | Expression |
|---|---|
| fnsng | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → {〈𝐴, 𝐵〉} Fn {𝐴}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | funsng 6592 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → Fun {〈𝐴, 𝐵〉}) | |
| 2 | dmsnopg 6207 | . . 3 ⊢ (𝐵 ∈ 𝑊 → dom {〈𝐴, 𝐵〉} = {𝐴}) | |
| 3 | 2 | adantl 481 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → dom {〈𝐴, 𝐵〉} = {𝐴}) |
| 4 | df-fn 6539 | . 2 ⊢ ({〈𝐴, 𝐵〉} Fn {𝐴} ↔ (Fun {〈𝐴, 𝐵〉} ∧ dom {〈𝐴, 𝐵〉} = {𝐴})) | |
| 5 | 1, 3, 4 | sylanbrc 583 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → {〈𝐴, 𝐵〉} Fn {𝐴}) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2109 {csn 4606 〈cop 4612 dom cdm 5659 Fun wfun 6530 Fn wfn 6531 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-ext 2708 ax-sep 5271 ax-nul 5281 ax-pr 5407 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-sb 2066 df-mo 2540 df-clab 2715 df-cleq 2728 df-clel 2810 df-ral 3053 df-rex 3062 df-rab 3421 df-v 3466 df-dif 3934 df-un 3936 df-ss 3948 df-nul 4314 df-if 4506 df-sn 4607 df-pr 4609 df-op 4613 df-br 5125 df-opab 5187 df-id 5553 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-fun 6538 df-fn 6539 |
| This theorem is referenced by: fnsn 6599 fnunop 6659 fnsnbg 7161 fvsnun2 7180 fsnunfv 7184 mat1dimscm 22418 m1detdiag 22540 noextenddif 27637 noextendlt 27638 noextendgt 27639 actfunsnf1o 34641 actfunsnrndisj 34642 breprexplema 34667 sticksstones11 42174 |
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