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| Mirrors > Home > MPE Home > Th. List > Mathboxes > fsetsnf1o | Structured version Visualization version GIF version | ||
| Description: The mapping of an element of a class to a singleton function is a bijection. (Contributed by AV, 13-Sep-2024.) |
| Ref | Expression |
|---|---|
| fsetsnf.a | ⊢ 𝐴 = {𝑦 ∣ ∃𝑏 ∈ 𝐵 𝑦 = {〈𝑆, 𝑏〉}} |
| fsetsnf.f | ⊢ 𝐹 = (𝑥 ∈ 𝐵 ↦ {〈𝑆, 𝑥〉}) |
| Ref | Expression |
|---|---|
| fsetsnf1o | ⊢ (𝑆 ∈ 𝑉 → 𝐹:𝐵–1-1-onto→𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fsetsnf.a | . . 3 ⊢ 𝐴 = {𝑦 ∣ ∃𝑏 ∈ 𝐵 𝑦 = {〈𝑆, 𝑏〉}} | |
| 2 | fsetsnf.f | . . 3 ⊢ 𝐹 = (𝑥 ∈ 𝐵 ↦ {〈𝑆, 𝑥〉}) | |
| 3 | 1, 2 | fsetsnf1 47713 | . 2 ⊢ (𝑆 ∈ 𝑉 → 𝐹:𝐵–1-1→𝐴) |
| 4 | 1, 2 | fsetsnfo 47714 | . 2 ⊢ (𝑆 ∈ 𝑉 → 𝐹:𝐵–onto→𝐴) |
| 5 | df-f1o 6544 | . 2 ⊢ (𝐹:𝐵–1-1-onto→𝐴 ↔ (𝐹:𝐵–1-1→𝐴 ∧ 𝐹:𝐵–onto→𝐴)) | |
| 6 | 3, 4, 5 | sylanbrc 594 | 1 ⊢ (𝑆 ∈ 𝑉 → 𝐹:𝐵–1-1-onto→𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1567 ∈ wcel 2149 {cab 2747 ∃wrex 3095 {csn 4592 〈cop 4598 ↦ cmpt 5194 –1-1→wf1 6534 –onto→wfo 6535 –1-1-onto→wf1o 6536 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5259 ax-nul 5271 ax-pr 5405 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-ral 3086 df-rex 3096 df-rab 3423 df-v 3463 df-sbc 3752 df-csb 3860 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-nul 4293 df-if 4491 df-sn 4593 df-pr 4595 df-op 4599 df-uni 4875 df-br 5112 df-opab 5176 df-mpt 5195 df-id 5557 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 |
| This theorem is referenced by: fsetsnprcnex 47716 |
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