| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > f1sng | Structured version Visualization version GIF version | ||
| Description: A singleton of an ordered pair is a one-to-one function. (Contributed by AV, 17-Apr-2021.) |
| Ref | Expression |
|---|---|
| f1sng | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → {〈𝐴, 𝐵〉}:{𝐴}⟶1-1𝑊) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | f1osng 6898 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → {〈𝐴, 𝐵〉}:{𝐴}⟶1-1onto{𝐵}) | |
| 2 | f1of1 6853 | . . 3 ⊢ ({〈𝐴, 𝐵〉}:{𝐴}⟶1-1onto{𝐵} → {〈𝐴, 𝐵〉}:{𝐴}⟶1-1{𝐵}) | |
| 3 | 1, 2 | syl 18 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → {〈𝐴, 𝐵〉}:{𝐴}⟶1-1{𝐵}) |
| 4 | snssi 4748 | . . 3 ⊢ (𝐵 ∈ 𝑊 → {𝐵} ⊆ 𝑊) | |
| 5 | 4 | adantl 487 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → {𝐵} ⊆ 𝑊) |
| 6 | f1ss 6815 | . 2 ⊢ (({〈𝐴, 𝐵〉}:{𝐴}⟶1-1{𝐵} ∧ {𝐵} ⊆ 𝑊) → {〈𝐴, 𝐵〉}:{𝐴}⟶1-1𝑊) | |
| 7 | 3, 5, 6 | syl2anc 596 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → {〈𝐴, 𝐵〉}:{𝐴}⟶1-1𝑊) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∈ wcel 2147 ⊆ wss 3900 {csn 4588 〈cop 4840 ⟶1-1wf1 6563 ⟶1-1ontowf1o 6565 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 ax-sep 5255 ax-pr 5398 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2102 df-mo 2567 df-clab 2742 df-cleq 2755 df-clel 2839 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4841 df-br 5109 df-opab 5174 df-id 5553 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 |
| This theorem is used by: fsnd 6900 uspgr1e 29882 0wlkons1 30769 f1sn2g 50293 |
| Copyright terms: Public domain | W3C validator |