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Theorem cnre2csqima 29285
Description: Image of a centered square by the canonical bijection from (ℝ × ℝ) to . (Contributed by Thierry Arnoux, 27-Sep-2017.)
Hypothesis
Ref Expression
cnre2csqima.1 𝐹 = (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ (𝑥 + (i · 𝑦)))
Assertion
Ref Expression
cnre2csqima ((𝑋 ∈ (ℝ × ℝ) ∧ 𝑌 ∈ (ℝ × ℝ) ∧ 𝐷 ∈ ℝ+) → (𝑌 ∈ ((((1st𝑋) − 𝐷)(,)((1st𝑋) + 𝐷)) × (((2nd𝑋) − 𝐷)(,)((2nd𝑋) + 𝐷))) → ((abs‘(ℜ‘((𝐹𝑌) − (𝐹𝑋)))) < 𝐷 ∧ (abs‘(ℑ‘((𝐹𝑌) − (𝐹𝑋)))) < 𝐷)))
Distinct variable group:   𝑥,𝑦
Allowed substitution hints:   𝐷(𝑥,𝑦)   𝐹(𝑥,𝑦)   𝑋(𝑥,𝑦)   𝑌(𝑥,𝑦)

Proof of Theorem cnre2csqima
Dummy variables 𝑧 𝑢 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ioossre 12106 . . 3 (((1st𝑋) − 𝐷)(,)((1st𝑋) + 𝐷)) ⊆ ℝ
2 ioossre 12106 . . 3 (((2nd𝑋) − 𝐷)(,)((2nd𝑋) + 𝐷)) ⊆ ℝ
3 xpinpreima2 29281 . . . 4 (((((1st𝑋) − 𝐷)(,)((1st𝑋) + 𝐷)) ⊆ ℝ ∧ (((2nd𝑋) − 𝐷)(,)((2nd𝑋) + 𝐷)) ⊆ ℝ) → ((((1st𝑋) − 𝐷)(,)((1st𝑋) + 𝐷)) × (((2nd𝑋) − 𝐷)(,)((2nd𝑋) + 𝐷))) = (((1st ↾ (ℝ × ℝ)) “ (((1st𝑋) − 𝐷)(,)((1st𝑋) + 𝐷))) ∩ ((2nd ↾ (ℝ × ℝ)) “ (((2nd𝑋) − 𝐷)(,)((2nd𝑋) + 𝐷)))))
43eleq2d 2673 . . 3 (((((1st𝑋) − 𝐷)(,)((1st𝑋) + 𝐷)) ⊆ ℝ ∧ (((2nd𝑋) − 𝐷)(,)((2nd𝑋) + 𝐷)) ⊆ ℝ) → (𝑌 ∈ ((((1st𝑋) − 𝐷)(,)((1st𝑋) + 𝐷)) × (((2nd𝑋) − 𝐷)(,)((2nd𝑋) + 𝐷))) ↔ 𝑌 ∈ (((1st ↾ (ℝ × ℝ)) “ (((1st𝑋) − 𝐷)(,)((1st𝑋) + 𝐷))) ∩ ((2nd ↾ (ℝ × ℝ)) “ (((2nd𝑋) − 𝐷)(,)((2nd𝑋) + 𝐷))))))
51, 2, 4mp2an 704 . 2 (𝑌 ∈ ((((1st𝑋) − 𝐷)(,)((1st𝑋) + 𝐷)) × (((2nd𝑋) − 𝐷)(,)((2nd𝑋) + 𝐷))) ↔ 𝑌 ∈ (((1st ↾ (ℝ × ℝ)) “ (((1st𝑋) − 𝐷)(,)((1st𝑋) + 𝐷))) ∩ ((2nd ↾ (ℝ × ℝ)) “ (((2nd𝑋) − 𝐷)(,)((2nd𝑋) + 𝐷)))))
6 elin 3758 . . 3 (𝑌 ∈ (((1st ↾ (ℝ × ℝ)) “ (((1st𝑋) − 𝐷)(,)((1st𝑋) + 𝐷))) ∩ ((2nd ↾ (ℝ × ℝ)) “ (((2nd𝑋) − 𝐷)(,)((2nd𝑋) + 𝐷)))) ↔ (𝑌 ∈ ((1st ↾ (ℝ × ℝ)) “ (((1st𝑋) − 𝐷)(,)((1st𝑋) + 𝐷))) ∧ 𝑌 ∈ ((2nd ↾ (ℝ × ℝ)) “ (((2nd𝑋) − 𝐷)(,)((2nd𝑋) + 𝐷)))))
7 simpl 472 . . . . . . . . . . 11 ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → 𝑥 ∈ ℝ)
87recnd 9947 . . . . . . . . . 10 ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → 𝑥 ∈ ℂ)
9 ax-icn 9874 . . . . . . . . . . . 12 i ∈ ℂ
109a1i 11 . . . . . . . . . . 11 ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → i ∈ ℂ)
11 simpr 476 . . . . . . . . . . . 12 ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → 𝑦 ∈ ℝ)
1211recnd 9947 . . . . . . . . . . 11 ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → 𝑦 ∈ ℂ)
1310, 12mulcld 9939 . . . . . . . . . 10 ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (i · 𝑦) ∈ ℂ)
148, 13addcld 9938 . . . . . . . . 9 ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝑥 + (i · 𝑦)) ∈ ℂ)
15 reval 13694 . . . . . . . . 9 ((𝑥 + (i · 𝑦)) ∈ ℂ → (ℜ‘(𝑥 + (i · 𝑦))) = (((𝑥 + (i · 𝑦)) + (∗‘(𝑥 + (i · 𝑦)))) / 2))
1614, 15syl 17 . . . . . . . 8 ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (ℜ‘(𝑥 + (i · 𝑦))) = (((𝑥 + (i · 𝑦)) + (∗‘(𝑥 + (i · 𝑦)))) / 2))
17 crre 13702 . . . . . . . 8 ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (ℜ‘(𝑥 + (i · 𝑦))) = 𝑥)
1816, 17eqtr3d 2646 . . . . . . 7 ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (((𝑥 + (i · 𝑦)) + (∗‘(𝑥 + (i · 𝑦)))) / 2) = 𝑥)
1918mpt2eq3ia 6618 . . . . . 6 (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ (((𝑥 + (i · 𝑦)) + (∗‘(𝑥 + (i · 𝑦)))) / 2)) = (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ 𝑥)
2014adantl 481 . . . . . . . 8 ((⊤ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → (𝑥 + (i · 𝑦)) ∈ ℂ)
21 cnre2csqima.1 . . . . . . . . 9 𝐹 = (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ (𝑥 + (i · 𝑦)))
2221a1i 11 . . . . . . . 8 (⊤ → 𝐹 = (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ (𝑥 + (i · 𝑦))))
23 df-re 13688 . . . . . . . . 9 ℜ = (𝑧 ∈ ℂ ↦ ((𝑧 + (∗‘𝑧)) / 2))
2423a1i 11 . . . . . . . 8 (⊤ → ℜ = (𝑧 ∈ ℂ ↦ ((𝑧 + (∗‘𝑧)) / 2)))
25 id 22 . . . . . . . . . 10 (𝑧 = (𝑥 + (i · 𝑦)) → 𝑧 = (𝑥 + (i · 𝑦)))
26 fveq2 6103 . . . . . . . . . 10 (𝑧 = (𝑥 + (i · 𝑦)) → (∗‘𝑧) = (∗‘(𝑥 + (i · 𝑦))))
2725, 26oveq12d 6567 . . . . . . . . 9 (𝑧 = (𝑥 + (i · 𝑦)) → (𝑧 + (∗‘𝑧)) = ((𝑥 + (i · 𝑦)) + (∗‘(𝑥 + (i · 𝑦)))))
2827oveq1d 6564 . . . . . . . 8 (𝑧 = (𝑥 + (i · 𝑦)) → ((𝑧 + (∗‘𝑧)) / 2) = (((𝑥 + (i · 𝑦)) + (∗‘(𝑥 + (i · 𝑦)))) / 2))
2920, 22, 24, 28fmpt2co 7147 . . . . . . 7 (⊤ → (ℜ ∘ 𝐹) = (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ (((𝑥 + (i · 𝑦)) + (∗‘(𝑥 + (i · 𝑦)))) / 2)))
3029trud 1484 . . . . . 6 (ℜ ∘ 𝐹) = (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ (((𝑥 + (i · 𝑦)) + (∗‘(𝑥 + (i · 𝑦)))) / 2))
31 df1stres 28864 . . . . . 6 (1st ↾ (ℝ × ℝ)) = (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ 𝑥)
3219, 30, 313eqtr4ri 2643 . . . . 5 (1st ↾ (ℝ × ℝ)) = (ℜ ∘ 𝐹)
3314rgen2a 2960 . . . . . 6 𝑥 ∈ ℝ ∀𝑦 ∈ ℝ (𝑥 + (i · 𝑦)) ∈ ℂ
3421fnmpt2 7127 . . . . . 6 (∀𝑥 ∈ ℝ ∀𝑦 ∈ ℝ (𝑥 + (i · 𝑦)) ∈ ℂ → 𝐹 Fn (ℝ × ℝ))
3533, 34ax-mp 5 . . . . 5 𝐹 Fn (ℝ × ℝ)
36 fo1st 7079 . . . . . 6 1st :V–onto→V
37 fofn 6030 . . . . . 6 (1st :V–onto→V → 1st Fn V)
3836, 37ax-mp 5 . . . . 5 1st Fn V
39 xp1st 7089 . . . . 5 (𝑧 ∈ (ℝ × ℝ) → (1st𝑧) ∈ ℝ)
4021rnmpt2 6668 . . . . . . . 8 ran 𝐹 = {𝑧 ∣ ∃𝑥 ∈ ℝ ∃𝑦 ∈ ℝ 𝑧 = (𝑥 + (i · 𝑦))}
41 simpr 476 . . . . . . . . . . . 12 (((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) ∧ 𝑧 = (𝑥 + (i · 𝑦))) → 𝑧 = (𝑥 + (i · 𝑦)))
4214adantr 480 . . . . . . . . . . . 12 (((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) ∧ 𝑧 = (𝑥 + (i · 𝑦))) → (𝑥 + (i · 𝑦)) ∈ ℂ)
4341, 42eqeltrd 2688 . . . . . . . . . . 11 (((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) ∧ 𝑧 = (𝑥 + (i · 𝑦))) → 𝑧 ∈ ℂ)
4443ex 449 . . . . . . . . . 10 ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝑧 = (𝑥 + (i · 𝑦)) → 𝑧 ∈ ℂ))
4544rexlimivv 3018 . . . . . . . . 9 (∃𝑥 ∈ ℝ ∃𝑦 ∈ ℝ 𝑧 = (𝑥 + (i · 𝑦)) → 𝑧 ∈ ℂ)
4645abssi 3640 . . . . . . . 8 {𝑧 ∣ ∃𝑥 ∈ ℝ ∃𝑦 ∈ ℝ 𝑧 = (𝑥 + (i · 𝑦))} ⊆ ℂ
4740, 46eqsstri 3598 . . . . . . 7 ran 𝐹 ⊆ ℂ
48 simpl 472 . . . . . . 7 ((𝑧 ∈ ran 𝐹𝑢 ∈ ran 𝐹) → 𝑧 ∈ ran 𝐹)
4947, 48sseldi 3566 . . . . . 6 ((𝑧 ∈ ran 𝐹𝑢 ∈ ran 𝐹) → 𝑧 ∈ ℂ)
50 simpr 476 . . . . . . 7 ((𝑧 ∈ ran 𝐹𝑢 ∈ ran 𝐹) → 𝑢 ∈ ran 𝐹)
5147, 50sseldi 3566 . . . . . 6 ((𝑧 ∈ ran 𝐹𝑢 ∈ ran 𝐹) → 𝑢 ∈ ℂ)
5249, 51resubd 13804 . . . . 5 ((𝑧 ∈ ran 𝐹𝑢 ∈ ran 𝐹) → (ℜ‘(𝑧𝑢)) = ((ℜ‘𝑧) − (ℜ‘𝑢)))
5332, 35, 38, 39, 52cnre2csqlem 29284 . . . 4 ((𝑋 ∈ (ℝ × ℝ) ∧ 𝑌 ∈ (ℝ × ℝ) ∧ 𝐷 ∈ ℝ+) → (𝑌 ∈ ((1st ↾ (ℝ × ℝ)) “ (((1st𝑋) − 𝐷)(,)((1st𝑋) + 𝐷))) → (abs‘(ℜ‘((𝐹𝑌) − (𝐹𝑋)))) < 𝐷))
54 imval 13695 . . . . . . . . 9 ((𝑥 + (i · 𝑦)) ∈ ℂ → (ℑ‘(𝑥 + (i · 𝑦))) = (ℜ‘((𝑥 + (i · 𝑦)) / i)))
5514, 54syl 17 . . . . . . . 8 ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (ℑ‘(𝑥 + (i · 𝑦))) = (ℜ‘((𝑥 + (i · 𝑦)) / i)))
56 crim 13703 . . . . . . . 8 ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (ℑ‘(𝑥 + (i · 𝑦))) = 𝑦)
5755, 56eqtr3d 2646 . . . . . . 7 ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (ℜ‘((𝑥 + (i · 𝑦)) / i)) = 𝑦)
5857mpt2eq3ia 6618 . . . . . 6 (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ (ℜ‘((𝑥 + (i · 𝑦)) / i))) = (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ 𝑦)
59 df-im 13689 . . . . . . . . 9 ℑ = (𝑧 ∈ ℂ ↦ (ℜ‘(𝑧 / i)))
6059a1i 11 . . . . . . . 8 (⊤ → ℑ = (𝑧 ∈ ℂ ↦ (ℜ‘(𝑧 / i))))
61 oveq1 6556 . . . . . . . . 9 (𝑧 = (𝑥 + (i · 𝑦)) → (𝑧 / i) = ((𝑥 + (i · 𝑦)) / i))
6261fveq2d 6107 . . . . . . . 8 (𝑧 = (𝑥 + (i · 𝑦)) → (ℜ‘(𝑧 / i)) = (ℜ‘((𝑥 + (i · 𝑦)) / i)))
6320, 22, 60, 62fmpt2co 7147 . . . . . . 7 (⊤ → (ℑ ∘ 𝐹) = (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ (ℜ‘((𝑥 + (i · 𝑦)) / i))))
6463trud 1484 . . . . . 6 (ℑ ∘ 𝐹) = (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ (ℜ‘((𝑥 + (i · 𝑦)) / i)))
65 df2ndres 28865 . . . . . 6 (2nd ↾ (ℝ × ℝ)) = (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ 𝑦)
6658, 64, 653eqtr4ri 2643 . . . . 5 (2nd ↾ (ℝ × ℝ)) = (ℑ ∘ 𝐹)
67 fo2nd 7080 . . . . . 6 2nd :V–onto→V
68 fofn 6030 . . . . . 6 (2nd :V–onto→V → 2nd Fn V)
6967, 68ax-mp 5 . . . . 5 2nd Fn V
70 xp2nd 7090 . . . . 5 (𝑧 ∈ (ℝ × ℝ) → (2nd𝑧) ∈ ℝ)
7149, 51imsubd 13805 . . . . 5 ((𝑧 ∈ ran 𝐹𝑢 ∈ ran 𝐹) → (ℑ‘(𝑧𝑢)) = ((ℑ‘𝑧) − (ℑ‘𝑢)))
7266, 35, 69, 70, 71cnre2csqlem 29284 . . . 4 ((𝑋 ∈ (ℝ × ℝ) ∧ 𝑌 ∈ (ℝ × ℝ) ∧ 𝐷 ∈ ℝ+) → (𝑌 ∈ ((2nd ↾ (ℝ × ℝ)) “ (((2nd𝑋) − 𝐷)(,)((2nd𝑋) + 𝐷))) → (abs‘(ℑ‘((𝐹𝑌) − (𝐹𝑋)))) < 𝐷))
7353, 72anim12d 584 . . 3 ((𝑋 ∈ (ℝ × ℝ) ∧ 𝑌 ∈ (ℝ × ℝ) ∧ 𝐷 ∈ ℝ+) → ((𝑌 ∈ ((1st ↾ (ℝ × ℝ)) “ (((1st𝑋) − 𝐷)(,)((1st𝑋) + 𝐷))) ∧ 𝑌 ∈ ((2nd ↾ (ℝ × ℝ)) “ (((2nd𝑋) − 𝐷)(,)((2nd𝑋) + 𝐷)))) → ((abs‘(ℜ‘((𝐹𝑌) − (𝐹𝑋)))) < 𝐷 ∧ (abs‘(ℑ‘((𝐹𝑌) − (𝐹𝑋)))) < 𝐷)))
746, 73syl5bi 231 . 2 ((𝑋 ∈ (ℝ × ℝ) ∧ 𝑌 ∈ (ℝ × ℝ) ∧ 𝐷 ∈ ℝ+) → (𝑌 ∈ (((1st ↾ (ℝ × ℝ)) “ (((1st𝑋) − 𝐷)(,)((1st𝑋) + 𝐷))) ∩ ((2nd ↾ (ℝ × ℝ)) “ (((2nd𝑋) − 𝐷)(,)((2nd𝑋) + 𝐷)))) → ((abs‘(ℜ‘((𝐹𝑌) − (𝐹𝑋)))) < 𝐷 ∧ (abs‘(ℑ‘((𝐹𝑌) − (𝐹𝑋)))) < 𝐷)))
755, 74syl5bi 231 1 ((𝑋 ∈ (ℝ × ℝ) ∧ 𝑌 ∈ (ℝ × ℝ) ∧ 𝐷 ∈ ℝ+) → (𝑌 ∈ ((((1st𝑋) − 𝐷)(,)((1st𝑋) + 𝐷)) × (((2nd𝑋) − 𝐷)(,)((2nd𝑋) + 𝐷))) → ((abs‘(ℜ‘((𝐹𝑌) − (𝐹𝑋)))) < 𝐷 ∧ (abs‘(ℑ‘((𝐹𝑌) − (𝐹𝑋)))) < 𝐷)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 195  wa 383  w3a 1031   = wceq 1475  wtru 1476  wcel 1977  {cab 2596  wral 2896  wrex 2897  Vcvv 3173  cin 3539  wss 3540   class class class wbr 4583  cmpt 4643   × cxp 5036  ccnv 5037  ran crn 5039  cres 5040  cima 5041  ccom 5042   Fn wfn 5799  ontowfo 5802  cfv 5804  (class class class)co 6549  cmpt2 6551  1st c1st 7057  2nd c2nd 7058  cc 9813  cr 9814  ici 9817   + caddc 9818   · cmul 9820   < clt 9953  cmin 10145   / cdiv 10563  2c2 10947  +crp 11708  (,)cioo 12046  ccj 13684  cre 13685  cim 13686  abscabs 13822
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-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-cnex 9871  ax-resscn 9872  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-mulcom 9879  ax-addass 9880  ax-mulass 9881  ax-distr 9882  ax-i2m1 9883  ax-1ne0 9884  ax-1rid 9885  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890  ax-pre-ltadd 9891  ax-pre-mulgt0 9892  ax-pre-sup 9893
This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-reu 2903  df-rmo 2904  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-uni 4373  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-tr 4681  df-eprel 4949  df-id 4953  df-po 4959  df-so 4960  df-fr 4997  df-we 4999  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-pred 5597  df-ord 5643  df-on 5644  df-lim 5645  df-suc 5646  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-om 6958  df-1st 7059  df-2nd 7060  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-er 7629  df-en 7842  df-dom 7843  df-sdom 7844  df-sup 8231  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-sub 10147  df-neg 10148  df-div 10564  df-nn 10898  df-2 10956  df-3 10957  df-n0 11170  df-z 11255  df-uz 11564  df-rp 11709  df-ioo 12050  df-seq 12664  df-exp 12723  df-cj 13687  df-re 13688  df-im 13689  df-sqrt 13823  df-abs 13824
This theorem is referenced by:  tpr2rico  29286
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