Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > riota2df | Structured version Visualization version GIF version |
Description: A deduction version of riota2f 6532. (Contributed by NM, 17-Feb-2013.) (Revised by Mario Carneiro, 15-Oct-2016.) |
Ref | Expression |
---|---|
riota2df.1 | ⊢ Ⅎ𝑥𝜑 |
riota2df.2 | ⊢ (𝜑 → Ⅎ𝑥𝐵) |
riota2df.3 | ⊢ (𝜑 → Ⅎ𝑥𝜒) |
riota2df.4 | ⊢ (𝜑 → 𝐵 ∈ 𝐴) |
riota2df.5 | ⊢ ((𝜑 ∧ 𝑥 = 𝐵) → (𝜓 ↔ 𝜒)) |
Ref | Expression |
---|---|
riota2df | ⊢ ((𝜑 ∧ ∃!𝑥 ∈ 𝐴 𝜓) → (𝜒 ↔ (℩𝑥 ∈ 𝐴 𝜓) = 𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | riota2df.4 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ 𝐴) | |
2 | 1 | adantr 480 | . . 3 ⊢ ((𝜑 ∧ ∃!𝑥 ∈ 𝐴 𝜓) → 𝐵 ∈ 𝐴) |
3 | simpr 476 | . . . 4 ⊢ ((𝜑 ∧ ∃!𝑥 ∈ 𝐴 𝜓) → ∃!𝑥 ∈ 𝐴 𝜓) | |
4 | df-reu 2903 | . . . 4 ⊢ (∃!𝑥 ∈ 𝐴 𝜓 ↔ ∃!𝑥(𝑥 ∈ 𝐴 ∧ 𝜓)) | |
5 | 3, 4 | sylib 207 | . . 3 ⊢ ((𝜑 ∧ ∃!𝑥 ∈ 𝐴 𝜓) → ∃!𝑥(𝑥 ∈ 𝐴 ∧ 𝜓)) |
6 | simpr 476 | . . . . . 6 ⊢ (((𝜑 ∧ ∃!𝑥 ∈ 𝐴 𝜓) ∧ 𝑥 = 𝐵) → 𝑥 = 𝐵) | |
7 | 2 | adantr 480 | . . . . . 6 ⊢ (((𝜑 ∧ ∃!𝑥 ∈ 𝐴 𝜓) ∧ 𝑥 = 𝐵) → 𝐵 ∈ 𝐴) |
8 | 6, 7 | eqeltrd 2688 | . . . . 5 ⊢ (((𝜑 ∧ ∃!𝑥 ∈ 𝐴 𝜓) ∧ 𝑥 = 𝐵) → 𝑥 ∈ 𝐴) |
9 | 8 | biantrurd 528 | . . . 4 ⊢ (((𝜑 ∧ ∃!𝑥 ∈ 𝐴 𝜓) ∧ 𝑥 = 𝐵) → (𝜓 ↔ (𝑥 ∈ 𝐴 ∧ 𝜓))) |
10 | riota2df.5 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 = 𝐵) → (𝜓 ↔ 𝜒)) | |
11 | 10 | adantlr 747 | . . . 4 ⊢ (((𝜑 ∧ ∃!𝑥 ∈ 𝐴 𝜓) ∧ 𝑥 = 𝐵) → (𝜓 ↔ 𝜒)) |
12 | 9, 11 | bitr3d 269 | . . 3 ⊢ (((𝜑 ∧ ∃!𝑥 ∈ 𝐴 𝜓) ∧ 𝑥 = 𝐵) → ((𝑥 ∈ 𝐴 ∧ 𝜓) ↔ 𝜒)) |
13 | riota2df.1 | . . . 4 ⊢ Ⅎ𝑥𝜑 | |
14 | nfreu1 3089 | . . . 4 ⊢ Ⅎ𝑥∃!𝑥 ∈ 𝐴 𝜓 | |
15 | 13, 14 | nfan 1816 | . . 3 ⊢ Ⅎ𝑥(𝜑 ∧ ∃!𝑥 ∈ 𝐴 𝜓) |
16 | riota2df.3 | . . . 4 ⊢ (𝜑 → Ⅎ𝑥𝜒) | |
17 | 16 | adantr 480 | . . 3 ⊢ ((𝜑 ∧ ∃!𝑥 ∈ 𝐴 𝜓) → Ⅎ𝑥𝜒) |
18 | riota2df.2 | . . . 4 ⊢ (𝜑 → Ⅎ𝑥𝐵) | |
19 | 18 | adantr 480 | . . 3 ⊢ ((𝜑 ∧ ∃!𝑥 ∈ 𝐴 𝜓) → Ⅎ𝑥𝐵) |
20 | 2, 5, 12, 15, 17, 19 | iota2df 5792 | . 2 ⊢ ((𝜑 ∧ ∃!𝑥 ∈ 𝐴 𝜓) → (𝜒 ↔ (℩𝑥(𝑥 ∈ 𝐴 ∧ 𝜓)) = 𝐵)) |
21 | df-riota 6511 | . . 3 ⊢ (℩𝑥 ∈ 𝐴 𝜓) = (℩𝑥(𝑥 ∈ 𝐴 ∧ 𝜓)) | |
22 | 21 | eqeq1i 2615 | . 2 ⊢ ((℩𝑥 ∈ 𝐴 𝜓) = 𝐵 ↔ (℩𝑥(𝑥 ∈ 𝐴 ∧ 𝜓)) = 𝐵) |
23 | 20, 22 | syl6bbr 277 | 1 ⊢ ((𝜑 ∧ ∃!𝑥 ∈ 𝐴 𝜓) → (𝜒 ↔ (℩𝑥 ∈ 𝐴 𝜓) = 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 195 ∧ wa 383 = wceq 1475 Ⅎwnf 1699 ∈ wcel 1977 ∃!weu 2458 Ⅎwnfc 2738 ∃!wreu 2898 ℩cio 5766 ℩crio 6510 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ral 2901 df-rex 2902 df-reu 2903 df-v 3175 df-sbc 3403 df-un 3545 df-sn 4126 df-pr 4128 df-uni 4373 df-iota 5768 df-riota 6511 |
This theorem is referenced by: riota2f 6532 riota5f 6535 mapdheq 36035 hdmap1eq 36109 hdmapval2lem 36141 riotaeqimp 40338 |
Copyright terms: Public domain | W3C validator |