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Description: Obsolete version of divcn as of 6-Apr-2025. (Contributed by Mario Carneiro, 12-Aug-2014) (Proof modification is discouraged.) (New usage is discouraged.)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | addcn.j | ⊢ 𝐽 = ( TopOpen ‘ ℂfld ) | |
| divcnOLD.k | ⊢ 𝐾 = ( 𝐽 ↾t ( ℂ ∖ { 0 } ) ) | ||
| Assertion | divcnOLD | ⊢ / ∈ ( ( 𝐽 ×t 𝐾 ) Cn 𝐽 ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | addcn.j | ⊢ 𝐽 = ( TopOpen ‘ ℂfld ) | |
| 2 | divcnOLD.k | ⊢ 𝐾 = ( 𝐽 ↾t ( ℂ ∖ { 0 } ) ) | |
| 3 | df-div | ⊢ / = ( 𝑥 ∈ ℂ , 𝑦 ∈ ( ℂ ∖ { 0 } ) ↦ ( ℩ 𝑧 ∈ ℂ ( 𝑦 · 𝑧 ) = 𝑥 ) ) | |
| 4 | eldifsn | ⊢ ( 𝑦 ∈ ( ℂ ∖ { 0 } ) ↔ ( 𝑦 ∈ ℂ ∧ 𝑦 ≠ 0 ) ) | |
| 5 | divval | ⊢ ( ( 𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ ∧ 𝑦 ≠ 0 ) → ( 𝑥 / 𝑦 ) = ( ℩ 𝑧 ∈ ℂ ( 𝑦 · 𝑧 ) = 𝑥 ) ) | |
| 6 | divrec | ⊢ ( ( 𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ ∧ 𝑦 ≠ 0 ) → ( 𝑥 / 𝑦 ) = ( 𝑥 · ( 1 / 𝑦 ) ) ) | |
| 7 | 5 6 | eqtr3d | ⊢ ( ( 𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ ∧ 𝑦 ≠ 0 ) → ( ℩ 𝑧 ∈ ℂ ( 𝑦 · 𝑧 ) = 𝑥 ) = ( 𝑥 · ( 1 / 𝑦 ) ) ) |
| 8 | 7 | 3expb | ⊢ ( ( 𝑥 ∈ ℂ ∧ ( 𝑦 ∈ ℂ ∧ 𝑦 ≠ 0 ) ) → ( ℩ 𝑧 ∈ ℂ ( 𝑦 · 𝑧 ) = 𝑥 ) = ( 𝑥 · ( 1 / 𝑦 ) ) ) |
| 9 | 4 8 | sylan2b | ⊢ ( ( 𝑥 ∈ ℂ ∧ 𝑦 ∈ ( ℂ ∖ { 0 } ) ) → ( ℩ 𝑧 ∈ ℂ ( 𝑦 · 𝑧 ) = 𝑥 ) = ( 𝑥 · ( 1 / 𝑦 ) ) ) |
| 10 | 9 | mpoeq3ia | ⊢ ( 𝑥 ∈ ℂ , 𝑦 ∈ ( ℂ ∖ { 0 } ) ↦ ( ℩ 𝑧 ∈ ℂ ( 𝑦 · 𝑧 ) = 𝑥 ) ) = ( 𝑥 ∈ ℂ , 𝑦 ∈ ( ℂ ∖ { 0 } ) ↦ ( 𝑥 · ( 1 / 𝑦 ) ) ) |
| 11 | 3 10 | eqtri | ⊢ / = ( 𝑥 ∈ ℂ , 𝑦 ∈ ( ℂ ∖ { 0 } ) ↦ ( 𝑥 · ( 1 / 𝑦 ) ) ) |
| 12 | 1 | cnfldtopon | ⊢ 𝐽 ∈ ( TopOn ‘ ℂ ) |
| 13 | 12 | a1i | ⊢ ( ⊤ → 𝐽 ∈ ( TopOn ‘ ℂ ) ) |
| 14 | difss | ⊢ ( ℂ ∖ { 0 } ) ⊆ ℂ | |
| 15 | resttopon | ⊢ ( ( 𝐽 ∈ ( TopOn ‘ ℂ ) ∧ ( ℂ ∖ { 0 } ) ⊆ ℂ ) → ( 𝐽 ↾t ( ℂ ∖ { 0 } ) ) ∈ ( TopOn ‘ ( ℂ ∖ { 0 } ) ) ) | |
| 16 | 13 14 15 | sylancl | ⊢ ( ⊤ → ( 𝐽 ↾t ( ℂ ∖ { 0 } ) ) ∈ ( TopOn ‘ ( ℂ ∖ { 0 } ) ) ) |
| 17 | 2 16 | eqeltrid | ⊢ ( ⊤ → 𝐾 ∈ ( TopOn ‘ ( ℂ ∖ { 0 } ) ) ) |
| 18 | 13 17 | cnmpt1st | ⊢ ( ⊤ → ( 𝑥 ∈ ℂ , 𝑦 ∈ ( ℂ ∖ { 0 } ) ↦ 𝑥 ) ∈ ( ( 𝐽 ×t 𝐾 ) Cn 𝐽 ) ) |
| 19 | 13 17 | cnmpt2nd | ⊢ ( ⊤ → ( 𝑥 ∈ ℂ , 𝑦 ∈ ( ℂ ∖ { 0 } ) ↦ 𝑦 ) ∈ ( ( 𝐽 ×t 𝐾 ) Cn 𝐾 ) ) |
| 20 | eqid | ⊢ ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) = ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) | |
| 21 | eldifsn | ⊢ ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↔ ( 𝑧 ∈ ℂ ∧ 𝑧 ≠ 0 ) ) | |
| 22 | reccl | ⊢ ( ( 𝑧 ∈ ℂ ∧ 𝑧 ≠ 0 ) → ( 1 / 𝑧 ) ∈ ℂ ) | |
| 23 | 21 22 | sylbi | ⊢ ( 𝑧 ∈ ( ℂ ∖ { 0 } ) → ( 1 / 𝑧 ) ∈ ℂ ) |
| 24 | 20 23 | fmpti | ⊢ ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) : ( ℂ ∖ { 0 } ) ⟶ ℂ |
| 25 | eqid | ⊢ ( if ( 1 ≤ ( ( abs ‘ 𝑥 ) · 𝑦 ) , 1 , ( ( abs ‘ 𝑥 ) · 𝑦 ) ) · ( ( abs ‘ 𝑥 ) / 2 ) ) = ( if ( 1 ≤ ( ( abs ‘ 𝑥 ) · 𝑦 ) , 1 , ( ( abs ‘ 𝑥 ) · 𝑦 ) ) · ( ( abs ‘ 𝑥 ) / 2 ) ) | |
| 26 | 25 | reccn2 | ⊢ ( ( 𝑥 ∈ ( ℂ ∖ { 0 } ) ∧ 𝑦 ∈ ℝ+ ) → ∃ 𝑢 ∈ ℝ+ ∀ 𝑤 ∈ ( ℂ ∖ { 0 } ) ( ( abs ‘ ( 𝑤 − 𝑥 ) ) < 𝑢 → ( abs ‘ ( ( 1 / 𝑤 ) − ( 1 / 𝑥 ) ) ) < 𝑦 ) ) |
| 27 | ovres | ⊢ ( ( 𝑥 ∈ ( ℂ ∖ { 0 } ) ∧ 𝑤 ∈ ( ℂ ∖ { 0 } ) ) → ( 𝑥 ( ( abs ∘ − ) ↾ ( ( ℂ ∖ { 0 } ) × ( ℂ ∖ { 0 } ) ) ) 𝑤 ) = ( 𝑥 ( abs ∘ − ) 𝑤 ) ) | |
| 28 | eldifi | ⊢ ( 𝑥 ∈ ( ℂ ∖ { 0 } ) → 𝑥 ∈ ℂ ) | |
| 29 | eldifi | ⊢ ( 𝑤 ∈ ( ℂ ∖ { 0 } ) → 𝑤 ∈ ℂ ) | |
| 30 | eqid | ⊢ ( abs ∘ − ) = ( abs ∘ − ) | |
| 31 | 30 | cnmetdval | ⊢ ( ( 𝑥 ∈ ℂ ∧ 𝑤 ∈ ℂ ) → ( 𝑥 ( abs ∘ − ) 𝑤 ) = ( abs ‘ ( 𝑥 − 𝑤 ) ) ) |
| 32 | abssub | ⊢ ( ( 𝑥 ∈ ℂ ∧ 𝑤 ∈ ℂ ) → ( abs ‘ ( 𝑥 − 𝑤 ) ) = ( abs ‘ ( 𝑤 − 𝑥 ) ) ) | |
| 33 | 31 32 | eqtrd | ⊢ ( ( 𝑥 ∈ ℂ ∧ 𝑤 ∈ ℂ ) → ( 𝑥 ( abs ∘ − ) 𝑤 ) = ( abs ‘ ( 𝑤 − 𝑥 ) ) ) |
| 34 | 28 29 33 | syl2an | ⊢ ( ( 𝑥 ∈ ( ℂ ∖ { 0 } ) ∧ 𝑤 ∈ ( ℂ ∖ { 0 } ) ) → ( 𝑥 ( abs ∘ − ) 𝑤 ) = ( abs ‘ ( 𝑤 − 𝑥 ) ) ) |
| 35 | 27 34 | eqtrd | ⊢ ( ( 𝑥 ∈ ( ℂ ∖ { 0 } ) ∧ 𝑤 ∈ ( ℂ ∖ { 0 } ) ) → ( 𝑥 ( ( abs ∘ − ) ↾ ( ( ℂ ∖ { 0 } ) × ( ℂ ∖ { 0 } ) ) ) 𝑤 ) = ( abs ‘ ( 𝑤 − 𝑥 ) ) ) |
| 36 | 35 | breq1d | ⊢ ( ( 𝑥 ∈ ( ℂ ∖ { 0 } ) ∧ 𝑤 ∈ ( ℂ ∖ { 0 } ) ) → ( ( 𝑥 ( ( abs ∘ − ) ↾ ( ( ℂ ∖ { 0 } ) × ( ℂ ∖ { 0 } ) ) ) 𝑤 ) < 𝑢 ↔ ( abs ‘ ( 𝑤 − 𝑥 ) ) < 𝑢 ) ) |
| 37 | oveq2 | ⊢ ( 𝑧 = 𝑥 → ( 1 / 𝑧 ) = ( 1 / 𝑥 ) ) | |
| 38 | ovex | ⊢ ( 1 / 𝑥 ) ∈ V | |
| 39 | 37 20 38 | fvmpt | ⊢ ( 𝑥 ∈ ( ℂ ∖ { 0 } ) → ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑥 ) = ( 1 / 𝑥 ) ) |
| 40 | oveq2 | ⊢ ( 𝑧 = 𝑤 → ( 1 / 𝑧 ) = ( 1 / 𝑤 ) ) | |
| 41 | ovex | ⊢ ( 1 / 𝑤 ) ∈ V | |
| 42 | 40 20 41 | fvmpt | ⊢ ( 𝑤 ∈ ( ℂ ∖ { 0 } ) → ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑤 ) = ( 1 / 𝑤 ) ) |
| 43 | 39 42 | oveqan12d | ⊢ ( ( 𝑥 ∈ ( ℂ ∖ { 0 } ) ∧ 𝑤 ∈ ( ℂ ∖ { 0 } ) ) → ( ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑥 ) ( abs ∘ − ) ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑤 ) ) = ( ( 1 / 𝑥 ) ( abs ∘ − ) ( 1 / 𝑤 ) ) ) |
| 44 | eldifsn | ⊢ ( 𝑥 ∈ ( ℂ ∖ { 0 } ) ↔ ( 𝑥 ∈ ℂ ∧ 𝑥 ≠ 0 ) ) | |
| 45 | reccl | ⊢ ( ( 𝑥 ∈ ℂ ∧ 𝑥 ≠ 0 ) → ( 1 / 𝑥 ) ∈ ℂ ) | |
| 46 | 44 45 | sylbi | ⊢ ( 𝑥 ∈ ( ℂ ∖ { 0 } ) → ( 1 / 𝑥 ) ∈ ℂ ) |
| 47 | eldifsn | ⊢ ( 𝑤 ∈ ( ℂ ∖ { 0 } ) ↔ ( 𝑤 ∈ ℂ ∧ 𝑤 ≠ 0 ) ) | |
| 48 | reccl | ⊢ ( ( 𝑤 ∈ ℂ ∧ 𝑤 ≠ 0 ) → ( 1 / 𝑤 ) ∈ ℂ ) | |
| 49 | 47 48 | sylbi | ⊢ ( 𝑤 ∈ ( ℂ ∖ { 0 } ) → ( 1 / 𝑤 ) ∈ ℂ ) |
| 50 | 30 | cnmetdval | ⊢ ( ( ( 1 / 𝑥 ) ∈ ℂ ∧ ( 1 / 𝑤 ) ∈ ℂ ) → ( ( 1 / 𝑥 ) ( abs ∘ − ) ( 1 / 𝑤 ) ) = ( abs ‘ ( ( 1 / 𝑥 ) − ( 1 / 𝑤 ) ) ) ) |
| 51 | abssub | ⊢ ( ( ( 1 / 𝑥 ) ∈ ℂ ∧ ( 1 / 𝑤 ) ∈ ℂ ) → ( abs ‘ ( ( 1 / 𝑥 ) − ( 1 / 𝑤 ) ) ) = ( abs ‘ ( ( 1 / 𝑤 ) − ( 1 / 𝑥 ) ) ) ) | |
| 52 | 50 51 | eqtrd | ⊢ ( ( ( 1 / 𝑥 ) ∈ ℂ ∧ ( 1 / 𝑤 ) ∈ ℂ ) → ( ( 1 / 𝑥 ) ( abs ∘ − ) ( 1 / 𝑤 ) ) = ( abs ‘ ( ( 1 / 𝑤 ) − ( 1 / 𝑥 ) ) ) ) |
| 53 | 46 49 52 | syl2an | ⊢ ( ( 𝑥 ∈ ( ℂ ∖ { 0 } ) ∧ 𝑤 ∈ ( ℂ ∖ { 0 } ) ) → ( ( 1 / 𝑥 ) ( abs ∘ − ) ( 1 / 𝑤 ) ) = ( abs ‘ ( ( 1 / 𝑤 ) − ( 1 / 𝑥 ) ) ) ) |
| 54 | 43 53 | eqtrd | ⊢ ( ( 𝑥 ∈ ( ℂ ∖ { 0 } ) ∧ 𝑤 ∈ ( ℂ ∖ { 0 } ) ) → ( ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑥 ) ( abs ∘ − ) ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑤 ) ) = ( abs ‘ ( ( 1 / 𝑤 ) − ( 1 / 𝑥 ) ) ) ) |
| 55 | 54 | breq1d | ⊢ ( ( 𝑥 ∈ ( ℂ ∖ { 0 } ) ∧ 𝑤 ∈ ( ℂ ∖ { 0 } ) ) → ( ( ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑥 ) ( abs ∘ − ) ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑤 ) ) < 𝑦 ↔ ( abs ‘ ( ( 1 / 𝑤 ) − ( 1 / 𝑥 ) ) ) < 𝑦 ) ) |
| 56 | 36 55 | imbi12d | ⊢ ( ( 𝑥 ∈ ( ℂ ∖ { 0 } ) ∧ 𝑤 ∈ ( ℂ ∖ { 0 } ) ) → ( ( ( 𝑥 ( ( abs ∘ − ) ↾ ( ( ℂ ∖ { 0 } ) × ( ℂ ∖ { 0 } ) ) ) 𝑤 ) < 𝑢 → ( ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑥 ) ( abs ∘ − ) ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑤 ) ) < 𝑦 ) ↔ ( ( abs ‘ ( 𝑤 − 𝑥 ) ) < 𝑢 → ( abs ‘ ( ( 1 / 𝑤 ) − ( 1 / 𝑥 ) ) ) < 𝑦 ) ) ) |
| 57 | 56 | ralbidva | ⊢ ( 𝑥 ∈ ( ℂ ∖ { 0 } ) → ( ∀ 𝑤 ∈ ( ℂ ∖ { 0 } ) ( ( 𝑥 ( ( abs ∘ − ) ↾ ( ( ℂ ∖ { 0 } ) × ( ℂ ∖ { 0 } ) ) ) 𝑤 ) < 𝑢 → ( ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑥 ) ( abs ∘ − ) ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑤 ) ) < 𝑦 ) ↔ ∀ 𝑤 ∈ ( ℂ ∖ { 0 } ) ( ( abs ‘ ( 𝑤 − 𝑥 ) ) < 𝑢 → ( abs ‘ ( ( 1 / 𝑤 ) − ( 1 / 𝑥 ) ) ) < 𝑦 ) ) ) |
| 58 | 57 | rexbidv | ⊢ ( 𝑥 ∈ ( ℂ ∖ { 0 } ) → ( ∃ 𝑢 ∈ ℝ+ ∀ 𝑤 ∈ ( ℂ ∖ { 0 } ) ( ( 𝑥 ( ( abs ∘ − ) ↾ ( ( ℂ ∖ { 0 } ) × ( ℂ ∖ { 0 } ) ) ) 𝑤 ) < 𝑢 → ( ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑥 ) ( abs ∘ − ) ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑤 ) ) < 𝑦 ) ↔ ∃ 𝑢 ∈ ℝ+ ∀ 𝑤 ∈ ( ℂ ∖ { 0 } ) ( ( abs ‘ ( 𝑤 − 𝑥 ) ) < 𝑢 → ( abs ‘ ( ( 1 / 𝑤 ) − ( 1 / 𝑥 ) ) ) < 𝑦 ) ) ) |
| 59 | 58 | adantr | ⊢ ( ( 𝑥 ∈ ( ℂ ∖ { 0 } ) ∧ 𝑦 ∈ ℝ+ ) → ( ∃ 𝑢 ∈ ℝ+ ∀ 𝑤 ∈ ( ℂ ∖ { 0 } ) ( ( 𝑥 ( ( abs ∘ − ) ↾ ( ( ℂ ∖ { 0 } ) × ( ℂ ∖ { 0 } ) ) ) 𝑤 ) < 𝑢 → ( ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑥 ) ( abs ∘ − ) ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑤 ) ) < 𝑦 ) ↔ ∃ 𝑢 ∈ ℝ+ ∀ 𝑤 ∈ ( ℂ ∖ { 0 } ) ( ( abs ‘ ( 𝑤 − 𝑥 ) ) < 𝑢 → ( abs ‘ ( ( 1 / 𝑤 ) − ( 1 / 𝑥 ) ) ) < 𝑦 ) ) ) |
| 60 | 26 59 | mpbird | ⊢ ( ( 𝑥 ∈ ( ℂ ∖ { 0 } ) ∧ 𝑦 ∈ ℝ+ ) → ∃ 𝑢 ∈ ℝ+ ∀ 𝑤 ∈ ( ℂ ∖ { 0 } ) ( ( 𝑥 ( ( abs ∘ − ) ↾ ( ( ℂ ∖ { 0 } ) × ( ℂ ∖ { 0 } ) ) ) 𝑤 ) < 𝑢 → ( ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑥 ) ( abs ∘ − ) ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑤 ) ) < 𝑦 ) ) |
| 61 | 60 | rgen2 | ⊢ ∀ 𝑥 ∈ ( ℂ ∖ { 0 } ) ∀ 𝑦 ∈ ℝ+ ∃ 𝑢 ∈ ℝ+ ∀ 𝑤 ∈ ( ℂ ∖ { 0 } ) ( ( 𝑥 ( ( abs ∘ − ) ↾ ( ( ℂ ∖ { 0 } ) × ( ℂ ∖ { 0 } ) ) ) 𝑤 ) < 𝑢 → ( ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑥 ) ( abs ∘ − ) ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑤 ) ) < 𝑦 ) |
| 62 | cnxmet | ⊢ ( abs ∘ − ) ∈ ( ∞Met ‘ ℂ ) | |
| 63 | xmetres2 | ⊢ ( ( ( abs ∘ − ) ∈ ( ∞Met ‘ ℂ ) ∧ ( ℂ ∖ { 0 } ) ⊆ ℂ ) → ( ( abs ∘ − ) ↾ ( ( ℂ ∖ { 0 } ) × ( ℂ ∖ { 0 } ) ) ) ∈ ( ∞Met ‘ ( ℂ ∖ { 0 } ) ) ) | |
| 64 | 62 14 63 | mp2an | ⊢ ( ( abs ∘ − ) ↾ ( ( ℂ ∖ { 0 } ) × ( ℂ ∖ { 0 } ) ) ) ∈ ( ∞Met ‘ ( ℂ ∖ { 0 } ) ) |
| 65 | eqid | ⊢ ( ( abs ∘ − ) ↾ ( ( ℂ ∖ { 0 } ) × ( ℂ ∖ { 0 } ) ) ) = ( ( abs ∘ − ) ↾ ( ( ℂ ∖ { 0 } ) × ( ℂ ∖ { 0 } ) ) ) | |
| 66 | 1 | cnfldtopn | ⊢ 𝐽 = ( MetOpen ‘ ( abs ∘ − ) ) |
| 67 | eqid | ⊢ ( MetOpen ‘ ( ( abs ∘ − ) ↾ ( ( ℂ ∖ { 0 } ) × ( ℂ ∖ { 0 } ) ) ) ) = ( MetOpen ‘ ( ( abs ∘ − ) ↾ ( ( ℂ ∖ { 0 } ) × ( ℂ ∖ { 0 } ) ) ) ) | |
| 68 | 65 66 67 | metrest | ⊢ ( ( ( abs ∘ − ) ∈ ( ∞Met ‘ ℂ ) ∧ ( ℂ ∖ { 0 } ) ⊆ ℂ ) → ( 𝐽 ↾t ( ℂ ∖ { 0 } ) ) = ( MetOpen ‘ ( ( abs ∘ − ) ↾ ( ( ℂ ∖ { 0 } ) × ( ℂ ∖ { 0 } ) ) ) ) ) |
| 69 | 62 14 68 | mp2an | ⊢ ( 𝐽 ↾t ( ℂ ∖ { 0 } ) ) = ( MetOpen ‘ ( ( abs ∘ − ) ↾ ( ( ℂ ∖ { 0 } ) × ( ℂ ∖ { 0 } ) ) ) ) |
| 70 | 2 69 | eqtri | ⊢ 𝐾 = ( MetOpen ‘ ( ( abs ∘ − ) ↾ ( ( ℂ ∖ { 0 } ) × ( ℂ ∖ { 0 } ) ) ) ) |
| 71 | 70 66 | metcn | ⊢ ( ( ( ( abs ∘ − ) ↾ ( ( ℂ ∖ { 0 } ) × ( ℂ ∖ { 0 } ) ) ) ∈ ( ∞Met ‘ ( ℂ ∖ { 0 } ) ) ∧ ( abs ∘ − ) ∈ ( ∞Met ‘ ℂ ) ) → ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ∈ ( 𝐾 Cn 𝐽 ) ↔ ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) : ( ℂ ∖ { 0 } ) ⟶ ℂ ∧ ∀ 𝑥 ∈ ( ℂ ∖ { 0 } ) ∀ 𝑦 ∈ ℝ+ ∃ 𝑢 ∈ ℝ+ ∀ 𝑤 ∈ ( ℂ ∖ { 0 } ) ( ( 𝑥 ( ( abs ∘ − ) ↾ ( ( ℂ ∖ { 0 } ) × ( ℂ ∖ { 0 } ) ) ) 𝑤 ) < 𝑢 → ( ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑥 ) ( abs ∘ − ) ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑤 ) ) < 𝑦 ) ) ) ) |
| 72 | 64 62 71 | mp2an | ⊢ ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ∈ ( 𝐾 Cn 𝐽 ) ↔ ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) : ( ℂ ∖ { 0 } ) ⟶ ℂ ∧ ∀ 𝑥 ∈ ( ℂ ∖ { 0 } ) ∀ 𝑦 ∈ ℝ+ ∃ 𝑢 ∈ ℝ+ ∀ 𝑤 ∈ ( ℂ ∖ { 0 } ) ( ( 𝑥 ( ( abs ∘ − ) ↾ ( ( ℂ ∖ { 0 } ) × ( ℂ ∖ { 0 } ) ) ) 𝑤 ) < 𝑢 → ( ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑥 ) ( abs ∘ − ) ( ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ‘ 𝑤 ) ) < 𝑦 ) ) ) |
| 73 | 24 61 72 | mpbir2an | ⊢ ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ∈ ( 𝐾 Cn 𝐽 ) |
| 74 | 73 | a1i | ⊢ ( ⊤ → ( 𝑧 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑧 ) ) ∈ ( 𝐾 Cn 𝐽 ) ) |
| 75 | oveq2 | ⊢ ( 𝑧 = 𝑦 → ( 1 / 𝑧 ) = ( 1 / 𝑦 ) ) | |
| 76 | 13 17 19 17 74 75 | cnmpt21 | ⊢ ( ⊤ → ( 𝑥 ∈ ℂ , 𝑦 ∈ ( ℂ ∖ { 0 } ) ↦ ( 1 / 𝑦 ) ) ∈ ( ( 𝐽 ×t 𝐾 ) Cn 𝐽 ) ) |
| 77 | 1 | mulcn | ⊢ · ∈ ( ( 𝐽 ×t 𝐽 ) Cn 𝐽 ) |
| 78 | 77 | a1i | ⊢ ( ⊤ → · ∈ ( ( 𝐽 ×t 𝐽 ) Cn 𝐽 ) ) |
| 79 | 13 17 18 76 78 | cnmpt22f | ⊢ ( ⊤ → ( 𝑥 ∈ ℂ , 𝑦 ∈ ( ℂ ∖ { 0 } ) ↦ ( 𝑥 · ( 1 / 𝑦 ) ) ) ∈ ( ( 𝐽 ×t 𝐾 ) Cn 𝐽 ) ) |
| 80 | 79 | mptru | ⊢ ( 𝑥 ∈ ℂ , 𝑦 ∈ ( ℂ ∖ { 0 } ) ↦ ( 𝑥 · ( 1 / 𝑦 ) ) ) ∈ ( ( 𝐽 ×t 𝐾 ) Cn 𝐽 ) |
| 81 | 11 80 | eqeltri | ⊢ / ∈ ( ( 𝐽 ×t 𝐾 ) Cn 𝐽 ) |