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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 511 | . 2 ⊢ (𝜑 → (𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊)) |
| 4 | f1sng 6817 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → {〈𝐴, 𝐵〉}:{𝐴}–1-1→𝑊) | |
| 5 | f1f 6730 | . 2 ⊢ ({〈𝐴, 𝐵〉}:{𝐴}–1-1→𝑊 → {〈𝐴, 𝐵〉}:{𝐴}⟶𝑊) | |
| 6 | 3, 4, 5 | 3syl 18 | 1 ⊢ (𝜑 → {〈𝐴, 𝐵〉}:{𝐴}⟶𝑊) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2113 {csn 4580 〈cop 4586 ⟶wf 6488 –1-1→wf1 6489 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pr 5377 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-mo 2539 df-clab 2715 df-cleq 2728 df-clel 2811 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 df-br 5099 df-opab 5161 df-id 5519 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 |
| This theorem is referenced by: 1fv 13563 snopiswrd 14446 frgpcyg 21528 mat1dimmul 22420 pt1hmeo 23750 upgr1e 29186 1hevtxdg1 29580 wlkp1 29753 wlkl0 30442 evlextv 33707 reprsuc 34772 breprexplema 34787 satfv1lem 35556 frlmsnic 42795 fsetsniunop 47295 nnsum3primesprm 48036 0aryfvalel 48880 fv1arycl 48883 1arympt1fv 48885 1arymaptfo 48889 |
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