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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 6842 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → {〈𝐴, 𝐵〉}:{𝐴}–1-1→𝑊) | |
| 5 | f1f 6756 | . 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 2109 {csn 4589 〈cop 4595 ⟶wf 6507 –1-1→wf1 6508 |
| 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 2701 ax-sep 5251 ax-nul 5261 ax-pr 5387 |
| 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 2533 df-clab 2708 df-cleq 2721 df-clel 2803 df-ral 3045 df-rex 3054 df-rab 3406 df-v 3449 df-dif 3917 df-un 3919 df-ss 3931 df-nul 4297 df-if 4489 df-sn 4590 df-pr 4592 df-op 4596 df-br 5108 df-opab 5170 df-id 5533 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-fun 6513 df-fn 6514 df-f 6515 df-f1 6516 df-fo 6517 df-f1o 6518 |
| This theorem is referenced by: 1fv 13608 snopiswrd 14488 frgpcyg 21483 mat1dimmul 22363 pt1hmeo 23693 upgr1e 29040 1hevtxdg1 29434 wlkp1 29609 wlkl0 30296 reprsuc 34606 breprexplema 34621 satfv1lem 35349 frlmsnic 42528 fsetsniunop 47050 nnsum3primesprm 47791 0aryfvalel 48623 fv1arycl 48626 1arympt1fv 48628 1arymaptfo 48632 |
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