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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 6823 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → {〈𝐴, 𝐵〉}:{𝐴}–1-1→𝑊) | |
| 5 | f1f 6736 | . 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 2114 {csn 4567 〈cop 4573 ⟶wf 6494 –1-1→wf1 6495 |
| 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-ext 2708 ax-sep 5231 ax-pr 5375 |
| 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-sb 2069 df-mo 2539 df-clab 2715 df-cleq 2728 df-clel 2811 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-br 5086 df-opab 5148 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 |
| This theorem is referenced by: 1fv 13601 snopiswrd 14485 frgpcyg 21553 mat1dimmul 22441 pt1hmeo 23771 upgr1e 29182 1hevtxdg1 29575 wlkp1 29748 wlkl0 30437 evlextv 33686 reprsuc 34759 breprexplema 34774 satfv1lem 35544 frlmsnic 42985 fsetsniunop 47497 nnsum3primesprm 48266 0aryfvalel 49110 fv1arycl 49113 1arympt1fv 49115 1arymaptfo 49119 |
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