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| Mirrors > Home > MPE Home > Th. List > fsnd | Structured version Visualization version GIF version | ||
| Description: A singleton of an ordered pair is a function. (Contributed by AV, 17-Apr-2021.) |
| Ref | Expression |
|---|---|
| fsnd.a | ⊢ (𝜑 → 𝐴 ∈ 𝑉) |
| fsnd.b | ⊢ (𝜑 → 𝐵 ∈ 𝑊) |
| Ref | Expression |
|---|---|
| fsnd | ⊢ (𝜑 → {〈𝐴, 𝐵〉}:{𝐴}⟶𝑊) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fsnd.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ 𝑉) | |
| 2 | fsnd.b | . . 3 ⊢ (𝜑 → 𝐵 ∈ 𝑊) | |
| 3 | 1, 2 | jca 520 | . 2 ⊢ (𝜑 → (𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊)) |
| 4 | f1sng 6868 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → {〈𝐴, 𝐵〉}:{𝐴}–1-1→𝑊) | |
| 5 | f1f 6778 | . 2 ⊢ ({〈𝐴, 𝐵〉}:{𝐴}–1-1→𝑊 → {〈𝐴, 𝐵〉}:{𝐴}⟶𝑊) | |
| 6 | 3, 4, 5 | 3syl 19 | 1 ⊢ (𝜑 → {〈𝐴, 𝐵〉}:{𝐴}⟶𝑊) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 ∈ wcel 2150 {csn 4594 〈cop 4600 ⟶wf 6536 –1-1→wf1 6537 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1823 ax-4 1837 ax-5 1938 ax-6 1995 ax-7 2036 ax-8 2152 ax-9 2160 ax-ext 2742 ax-sep 5262 ax-pr 5408 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1571 df-fal 1581 df-ex 1808 df-sb 2099 df-mo 2574 df-clab 2749 df-cleq 2762 df-clel 2845 df-ral 3087 df-rex 3097 df-rab 3424 df-v 3464 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-br 5115 df-opab 5179 df-id 5560 df-xp 5671 df-rel 5672 df-cnv 5673 df-co 5674 df-dm 5675 df-rn 5676 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 |
| This theorem is referenced by: 1fv 13678 snopiswrd 14563 frgpcyg 21706 mat1dimmul 22616 pt1hmeo 23946 upgr1e 29433 1hevtxdg1 29826 wlkp1 29999 wlkl0 30688 0mplrim 33874 selvply1rhmlema 33878 selvply1rhmlemb 33879 selvply1rhmlem1 33880 selvply1rhmlem2 33881 selvply1rhmlem4 33883 selvply1rhm0 33886 evlextv 33902 reprsuc 34972 breprexplema 34987 satfv1lem 35812 frlmsnic 43260 fsetsniunop 47735 nnsum3primesprm 48504 0aryfvalel 49363 fv1arycl 49366 1arympt1fv 49368 1arymaptfo 49372 |
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