Proof of Theorem projlem5
| Step | Hyp | Ref
| Expression |
| 1 | | projlem5.2 |
. . 3
⊢ B
∈ ℋ |
| 2 | | projlem5.3 |
. . 3
⊢ C
∈ ℋ |
| 3 | | projlem5.1 |
. . 3
⊢ A
∈ ℋ |
| 4 | 1, 2, 3 | normpar2 5100 |
. 2
⊢ ((norm ‘(B −v C))↑2) = (((2 · ((norm ‘(B −v A))↑2)) + (2 · ((norm ‘(C −v A))↑2))) − ((norm ‘((B +v C) −v (2
·s A)))↑2)) |
| 5 | | projlem5.10 |
. . . . . . . 8
⊢ (norm ‘(B −v A)) < (R + (1
/ D)) |
| 6 | 1, 3 | hvsubcl 5002 |
. . . . . . . . . 10
⊢ (B
−v A) ∈
ℋ |
| 7 | | normge0t 5077 |
. . . . . . . . . 10
⊢ ((B
−v A) ∈
ℋ → 0 ≤ (norm ‘(B
−v A))) |
| 8 | 6, 7 | ax-mp 6 |
. . . . . . . . 9
⊢ 0 ≤ (norm ‘(B −v A)) |
| 9 | | projlem5.5 |
. . . . . . . . . 10
⊢ 0 ≤ R |
| 10 | | ax0re 4063 |
. . . . . . . . . . 11
⊢ 0 ∈ ℝ |
| 11 | | ax1re 4064 |
. . . . . . . . . . . 12
⊢ 1 ∈ ℝ |
| 12 | | projlem5.7 |
. . . . . . . . . . . . 13
⊢ D
∈ ℕ |
| 13 | 12 | nnre 4429 |
. . . . . . . . . . . 12
⊢ D
∈ ℝ |
| 14 | 12 | nnne0 4446 |
. . . . . . . . . . . 12
⊢ D ≠
0 |
| 15 | 11, 13, 14 | redivcl 4274 |
. . . . . . . . . . 11
⊢ (1 / D) ∈ ℝ |
| 16 | | nnrecgt0t 4447 |
. . . . . . . . . . . 12
⊢ (D
∈ ℕ → 0 < (1 / D)) |
| 17 | 12, 16 | ax-mp 6 |
. . . . . . . . . . 11
⊢ 0 < (1 / D) |
| 18 | 10, 15, 17 | ltlei 4303 |
. . . . . . . . . 10
⊢ 0 ≤ (1 / D) |
| 19 | | projlem5.4 |
. . . . . . . . . . 11
⊢ R
∈ ℝ |
| 20 | 19, 15 | addge0 4324 |
. . . . . . . . . 10
⊢ ((0 ≤ R ∧ 0 ≤ (1 / D)) → 0 ≤ (R + (1 / D))) |
| 21 | 9, 18, 20 | mp2an 520 |
. . . . . . . . 9
⊢ 0 ≤ (R + (1 / D)) |
| 22 | 6 | normcl 5081 |
. . . . . . . . . 10
⊢ (norm ‘(B −v A)) ∈ ℝ |
| 23 | 19, 15 | readdcl 4118 |
. . . . . . . . . 10
⊢ (R +
(1 / D)) ∈ ℝ |
| 24 | 22, 23 | lt2sqe 4700 |
. . . . . . . . 9
⊢ ((0 ≤ (norm ‘(B −v A)) ∧ 0 ≤ (R + (1 / D)))
→ ((norm ‘(B
−v A)) <
(R + (1 / D)) ↔ ((norm ‘(B −v A))↑2) < ((R + (1 / D))↑2))) |
| 25 | 8, 21, 24 | mp2an 520 |
. . . . . . . 8
⊢ ((norm ‘(B −v A)) < (R + (1
/ D)) ↔ ((norm ‘(B −v A))↑2) < ((R + (1 / D))↑2)) |
| 26 | 5, 25 | mpbi 164 |
. . . . . . 7
⊢ ((norm ‘(B −v A))↑2) < ((R + (1 / D))↑2) |
| 27 | | 2pos 4479 |
. . . . . . . 8
⊢ 0 < 2 |
| 28 | 22 | sqrecl 4699 |
. . . . . . . . 9
⊢ ((norm ‘(B −v A))↑2) ∈ ℝ |
| 29 | 23 | sqrecl 4699 |
. . . . . . . . 9
⊢ ((R +
(1 / D))↑2) ∈ ℝ |
| 30 | | 2re 4470 |
. . . . . . . . 9
⊢ 2 ∈ ℝ |
| 31 | 28, 29, 30 | ltmul2 4395 |
. . . . . . . 8
⊢ (0 < 2 → (((norm ‘(B −v A))↑2) < ((R + (1 / D))↑2) ↔ (2 · ((norm
‘(B −v
A))↑2)) < (2 · ((R + (1 / D))↑2)))) |
| 32 | 27, 31 | ax-mp 6 |
. . . . . . 7
⊢ (((norm ‘(B −v A))↑2) < ((R + (1 / D))↑2) ↔ (2 · ((norm
‘(B −v
A))↑2)) < (2 · ((R + (1 / D))↑2))) |
| 33 | 26, 32 | mpbi 164 |
. . . . . 6
⊢ (2 · ((norm ‘(B −v A))↑2)) < (2 · ((R + (1 / D))↑2)) |
| 34 | | projlem5.11 |
. . . . . . . 8
⊢ (norm ‘(C −v A)) < (R + (1
/ G)) |
| 35 | 2, 3 | hvsubcl 5002 |
. . . . . . . . . 10
⊢ (C
−v A) ∈
ℋ |
| 36 | | normge0t 5077 |
. . . . . . . . . 10
⊢ ((C
−v A) ∈
ℋ → 0 ≤ (norm ‘(C
−v A))) |
| 37 | 35, 36 | ax-mp 6 |
. . . . . . . . 9
⊢ 0 ≤ (norm ‘(C −v A)) |
| 38 | | projlem5.8 |
. . . . . . . . . . . . 13
⊢ G
∈ ℕ |
| 39 | 38 | nnre 4429 |
. . . . . . . . . . . 12
⊢ G
∈ ℝ |
| 40 | 38 | nnne0 4446 |
. . . . . . . . . . . 12
⊢ G ≠
0 |
| 41 | 11, 39, 40 | redivcl 4274 |
. . . . . . . . . . 11
⊢ (1 / G) ∈ ℝ |
| 42 | | nnrecgt0t 4447 |
. . . . . . . . . . . 12
⊢ (G
∈ ℕ → 0 < (1 / G)) |
| 43 | 38, 42 | ax-mp 6 |
. . . . . . . . . . 11
⊢ 0 < (1 / G) |
| 44 | 10, 41, 43 | ltlei 4303 |
. . . . . . . . . 10
⊢ 0 ≤ (1 / G) |
| 45 | 19, 41 | addge0 4324 |
. . . . . . . . . 10
⊢ ((0 ≤ R ∧ 0 ≤ (1 / G)) → 0 ≤ (R + (1 / G))) |
| 46 | 9, 44, 45 | mp2an 520 |
. . . . . . . . 9
⊢ 0 ≤ (R + (1 / G)) |
| 47 | 35 | normcl 5081 |
. . . . . . . . . 10
⊢ (norm ‘(C −v A)) ∈ ℝ |
| 48 | 19, 41 | readdcl 4118 |
. . . . . . . . . 10
⊢ (R +
(1 / G)) ∈ ℝ |
| 49 | 47, 48 | lt2sqe 4700 |
. . . . . . . . 9
⊢ ((0 ≤ (norm ‘(C −v A)) ∧ 0 ≤ (R + (1 / G)))
→ ((norm ‘(C
−v A)) <
(R + (1 / G)) ↔ ((norm ‘(C −v A))↑2) < ((R + (1 / G))↑2))) |
| 50 | 37, 46, 49 | mp2an 520 |
. . . . . . . 8
⊢ ((norm ‘(C −v A)) < (R + (1
/ G)) ↔ ((norm ‘(C −v A))↑2) < ((R + (1 / G))↑2)) |
| 51 | 34, 50 | mpbi 164 |
. . . . . . 7
⊢ ((norm ‘(C −v A))↑2) < ((R + (1 / G))↑2) |
| 52 | 47 | sqrecl 4699 |
. . . . . . . . 9
⊢ ((norm ‘(C −v A))↑2) ∈ ℝ |
| 53 | 48 | sqrecl 4699 |
. . . . . . . . 9
⊢ ((R +
(1 / G))↑2) ∈ ℝ |
| 54 | 52, 53, 30 | ltmul2 4395 |
. . . . . . . 8
⊢ (0 < 2 → (((norm ‘(C −v A))↑2) < ((R + (1 / G))↑2) ↔ (2 · ((norm
‘(C −v
A))↑2)) < (2 · ((R + (1 / G))↑2)))) |
| 55 | 27, 54 | ax-mp 6 |
. . . . . . 7
⊢ (((norm ‘(C −v A))↑2) < ((R + (1 / G))↑2) ↔ (2 · ((norm
‘(C −v
A))↑2)) < (2 · ((R + (1 / G))↑2))) |
| 56 | 51, 55 | mpbi 164 |
. . . . . 6
⊢ (2 · ((norm ‘(C −v A))↑2)) < (2 · ((R + (1 / G))↑2)) |
| 57 | 30, 28 | remulcl 4119 |
. . . . . . 7
⊢ (2 · ((norm ‘(B −v A))↑2)) ∈ ℝ |
| 58 | 30, 52 | remulcl 4119 |
. . . . . . 7
⊢ (2 · ((norm ‘(C −v A))↑2)) ∈ ℝ |
| 59 | 30, 29 | remulcl 4119 |
. . . . . . 7
⊢ (2 · ((R + (1 / D))↑2)) ∈ ℝ |
| 60 | 30, 53 | remulcl 4119 |
. . . . . . 7
⊢ (2 · ((R + (1 / G))↑2)) ∈ ℝ |
| 61 | 57, 58, 59, 60 | lt2add 4321 |
. . . . . 6
⊢ (((2 · ((norm ‘(B −v A))↑2)) < (2 · ((R + (1 / D))↑2)) ∧ (2 · ((norm
‘(C −v
A))↑2)) < (2 · ((R + (1 / G))↑2))) → ((2 · ((norm
‘(B −v
A))↑2)) + (2 · ((norm
‘(C −v
A))↑2))) < ((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2)))) |
| 62 | 33, 56, 61 | mp2an 520 |
. . . . 5
⊢ ((2 · ((norm ‘(B −v A))↑2)) + (2 · ((norm ‘(C −v A))↑2))) < ((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2))) |
| 63 | 57, 58 | readdcl 4118 |
. . . . . 6
⊢ ((2 · ((norm ‘(B −v A))↑2)) + (2 · ((norm ‘(C −v A))↑2))) ∈ ℝ |
| 64 | 59, 60 | readdcl 4118 |
. . . . . 6
⊢ ((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2))) ∈ ℝ |
| 65 | 1, 2 | hvaddcl 4999 |
. . . . . . . . . 10
⊢ (B
+v C) ∈
ℋ |
| 66 | | 2cn 4471 |
. . . . . . . . . . 11
⊢ 2 ∈ ℂ |
| 67 | 66, 3 | hvmulcl 4990 |
. . . . . . . . . 10
⊢ (2 ·s
A) ∈ ℋ |
| 68 | 65, 67 | hvsubcl 5002 |
. . . . . . . . 9
⊢ ((B
+v C)
−v (2 ·s A)) ∈ ℋ |
| 69 | 68 | normcl 5081 |
. . . . . . . 8
⊢ (norm ‘((B +v C) −v (2
·s A)))
∈ ℝ |
| 70 | 69 | sqrecl 4699 |
. . . . . . 7
⊢ ((norm ‘((B +v C) −v (2
·s A)))↑2) ∈ ℝ |
| 71 | 70 | renegcl 4171 |
. . . . . 6
⊢ -((norm ‘((B +v C) −v (2
·s A)))↑2) ∈ ℝ |
| 72 | 63, 64, 71 | ltadd1 4313 |
. . . . 5
⊢ (((2 · ((norm ‘(B −v A))↑2)) + (2 · ((norm ‘(C −v A))↑2))) < ((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2))) ↔ (((2 · ((norm
‘(B −v
A))↑2)) + (2 · ((norm
‘(C −v
A))↑2))) + -((norm ‘((B +v C) −v (2
·s A)))↑2)) < (((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2))) + -((norm ‘((B +v C) −v (2
·s A)))↑2))) |
| 73 | 62, 72 | mpbi 164 |
. . . 4
⊢ (((2 · ((norm ‘(B −v A))↑2)) + (2 · ((norm ‘(C −v A))↑2))) + -((norm ‘((B +v C) −v (2
·s A)))↑2)) < (((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2))) + -((norm ‘((B +v C) −v (2
·s A)))↑2)) |
| 74 | | projlem5.6 |
. . . . . 6
⊢ (4 · (R↑2)) ≤ ((norm ‘((B +v C) −v (2
·s A)))↑2) |
| 75 | | 4re 4473 |
. . . . . . . 8
⊢ 4 ∈ ℝ |
| 76 | 19 | sqrecl 4699 |
. . . . . . . 8
⊢ (R↑2) ∈ ℝ |
| 77 | 75, 76 | remulcl 4119 |
. . . . . . 7
⊢ (4 · (R↑2)) ∈ ℝ |
| 78 | 77, 70 | leneg 4331 |
. . . . . 6
⊢ ((4 · (R↑2)) ≤ ((norm ‘((B +v C) −v (2
·s A)))↑2) ↔ -((norm ‘((B +v C) −v (2
·s A)))↑2) ≤ -(4 · (R↑2))) |
| 79 | 74, 78 | mpbi 164 |
. . . . 5
⊢ -((norm ‘((B +v C) −v (2
·s A)))↑2) ≤ -(4 · (R↑2)) |
| 80 | 77 | renegcl 4171 |
. . . . . 6
⊢ -(4 · (R↑2)) ∈ ℝ |
| 81 | 71, 80, 64 | leadd2 4315 |
. . . . 5
⊢ (-((norm ‘((B +v C) −v (2
·s A)))↑2) ≤ -(4 · (R↑2)) ↔ (((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2))) + -((norm ‘((B +v C) −v (2
·s A)))↑2)) ≤ (((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2))) + -(4 · (R↑2)))) |
| 82 | 79, 81 | mpbi 164 |
. . . 4
⊢ (((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2))) + -((norm ‘((B +v C) −v (2
·s A)))↑2)) ≤ (((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2))) + -(4 · (R↑2))) |
| 83 | 63, 71 | readdcl 4118 |
. . . . 5
⊢ (((2 · ((norm ‘(B −v A))↑2)) + (2 · ((norm ‘(C −v A))↑2))) + -((norm ‘((B +v C) −v (2
·s A)))↑2)) ∈ ℝ |
| 84 | 64, 71 | readdcl 4118 |
. . . . 5
⊢ (((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2))) + -((norm ‘((B +v C) −v (2
·s A)))↑2)) ∈ ℝ |
| 85 | 64, 80 | readdcl 4118 |
. . . . 5
⊢ (((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2))) + -(4 · (R↑2))) ∈ ℝ |
| 86 | 83, 84, 85 | ltletr 4309 |
. . . 4
⊢ (((((2 · ((norm ‘(B −v A))↑2)) + (2 · ((norm ‘(C −v A))↑2))) + -((norm ‘((B +v C) −v (2
·s A)))↑2)) < (((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2))) + -((norm ‘((B +v C) −v (2
·s A)))↑2)) ∧ (((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2))) + -((norm ‘((B +v C) −v (2
·s A)))↑2)) ≤ (((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2))) + -(4 · (R↑2)))) → (((2 · ((norm
‘(B −v
A))↑2)) + (2 · ((norm
‘(C −v
A))↑2))) + -((norm ‘((B +v C) −v (2
·s A)))↑2)) < (((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2))) + -(4 · (R↑2)))) |
| 87 | 73, 82, 86 | mp2an 520 |
. . 3
⊢ (((2 · ((norm ‘(B −v A))↑2)) + (2 · ((norm ‘(C −v A))↑2))) + -((norm ‘((B +v C) −v (2
·s A)))↑2)) < (((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2))) + -(4 · (R↑2))) |
| 88 | 63 | recn 4098 |
. . . 4
⊢ ((2 · ((norm ‘(B −v A))↑2)) + (2 · ((norm ‘(C −v A))↑2))) ∈ ℂ |
| 89 | 70 | recn 4098 |
. . . 4
⊢ ((norm ‘((B +v C) −v (2
·s A)))↑2) ∈ ℂ |
| 90 | 88, 89 | subneg 4148 |
. . 3
⊢ (((2 · ((norm ‘(B −v A))↑2)) + (2 · ((norm ‘(C −v A))↑2))) − ((norm ‘((B +v C) −v (2
·s A)))↑2)) = (((2 · ((norm
‘(B −v
A))↑2)) + (2 · ((norm
‘(C −v
A))↑2))) + -((norm ‘((B +v C) −v (2
·s A)))↑2)) |
| 91 | 64 | recn 4098 |
. . . 4
⊢ ((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2))) ∈ ℂ |
| 92 | 77 | recn 4098 |
. . . 4
⊢ (4 · (R↑2)) ∈ ℂ |
| 93 | 91, 92 | subneg 4148 |
. . 3
⊢ (((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2))) − (4 · (R↑2))) = (((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2))) + -(4 · (R↑2))) |
| 94 | 87, 90, 93 | 3brtr4 2085 |
. 2
⊢ (((2 · ((norm ‘(B −v A))↑2)) + (2 · ((norm ‘(C −v A))↑2))) − ((norm ‘((B +v C) −v (2
·s A)))↑2)) < (((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2))) − (4 · (R↑2))) |
| 95 | 4, 94 | eqbrtr 2076 |
1
⊢ ((norm ‘(B −v C))↑2) < (((2 · ((R + (1 / D))↑2)) + (2 · ((R + (1 / G))↑2))) − (4 · (R↑2))) |