Proof of Theorem hlimcaui
| Step | Hyp | Ref
| Expression |
| 1 | | hlimcaui.4 |
. . . 4
⊢ F
⇝v A |
| 2 | | hlimcau.2 |
. . . . 5
⊢ F
∈ V |
| 3 | | hlimcau.1 |
. . . . 5
⊢ A
∈ V |
| 4 | 2, 3 | hlimseq 5109 |
. . . 4
⊢ (F
⇝v A →
F:ℕ–→ ℋ ) |
| 5 | 1, 4 | ax-mp 6 |
. . 3
⊢ F:ℕ–→ ℋ |
| 6 | | breq2 2066 |
. . . . . . . . 9
⊢ (v =
(x / 2) → (0 < v ↔ 0 < (x / 2))) |
| 7 | | breq2 2066 |
. . . . . . . . . . . 12
⊢ (v =
(x / 2) → ((norm ‘((F ‘z)
−v A)) <
v ↔ (norm ‘((F ‘z)
−v A)) <
(x / 2))) |
| 8 | 7 | imbi2d 464 |
. . . . . . . . . . 11
⊢ (v =
(x / 2) → ((y ≤ z →
(norm ‘((F ‘z) −v A)) < v)
↔ (y ≤ z → (norm ‘((F ‘z)
−v A)) <
(x / 2)))) |
| 9 | 8 | biraldv 1219 |
. . . . . . . . . 10
⊢ (v =
(x / 2) → (∀z ∈ ℕ (y ≤ z →
(norm ‘((F ‘z) −v A)) < v)
↔ ∀z ∈ ℕ (y ≤ z →
(norm ‘((F ‘z) −v A)) < (x /
2)))) |
| 10 | 9 | birexdv 1220 |
. . . . . . . . 9
⊢ (v =
(x / 2) → (∃y ∈ ℕ ∀z ∈ ℕ (y ≤ z →
(norm ‘((F ‘z) −v A)) < v)
↔ ∃y ∈ ℕ
∀z ∈ ℕ (y ≤ z →
(norm ‘((F ‘z) −v A)) < (x /
2)))) |
| 11 | 6, 10 | imbi12d 474 |
. . . . . . . 8
⊢ (v =
(x / 2) → ((0 < v → ∃y ∈ ℕ ∀z ∈ ℕ (y ≤ z →
(norm ‘((F ‘z) −v A)) < v))
↔ (0 < (x / 2) →
∃y ∈ ℕ ∀z ∈ ℕ (y ≤ z →
(norm ‘((F ‘z) −v A)) < (x /
2))))) |
| 12 | 2, 3 | hlimvec 5110 |
. . . . . . . . . 10
⊢ (F
⇝v A →
A ∈ ℋ ) |
| 13 | 1, 12 | ax-mp 6 |
. . . . . . . . 9
⊢ A
∈ ℋ |
| 14 | | hlim2 5112 |
. . . . . . . . . 10
⊢ ((F:ℕ–→ ℋ ∧ A ∈ ℋ ) → (F ⇝v A ↔ ∀v ∈ ℝ (0 < v → ∃y ∈ ℕ ∀z ∈ ℕ (y ≤ z →
(norm ‘((F ‘z) −v A)) < v)))) |
| 15 | 1, 14 | mpbii 168 |
. . . . . . . . 9
⊢ ((F:ℕ–→ ℋ ∧ A ∈ ℋ ) → ∀v ∈ ℝ (0 < v → ∃y ∈ ℕ ∀z ∈ ℕ (y ≤ z →
(norm ‘((F ‘z) −v A)) < v))) |
| 16 | 5, 13, 15 | mp2an 520 |
. . . . . . . 8
⊢ ∀v ∈ ℝ (0 < v → ∃y ∈ ℕ ∀z ∈ ℕ (y ≤ z →
(norm ‘((F ‘z) −v A)) < v)) |
| 17 | 11, 16 | vtoclri 1393 |
. . . . . . 7
⊢ ((x /
2) ∈ ℝ → (0 < (x / 2)
→ ∃y ∈ ℕ
∀z ∈ ℕ (y ≤ z →
(norm ‘((F ‘z) −v A)) < (x /
2)))) |
| 18 | | opreq1 3006 |
. . . . . . . . . 10
⊢ (x =
if(x ∈ ℝ, x, 0) → (x
/ 2) = (if(x ∈ ℝ, x, 0) / 2)) |
| 19 | 18 | eleq1d 1155 |
. . . . . . . . 9
⊢ (x =
if(x ∈ ℝ, x, 0) → ((x
/ 2) ∈ ℝ ↔ (if(x ∈
ℝ, x, 0) / 2) ∈
ℝ)) |
| 20 | | ax0re 4063 |
. . . . . . . . . . 11
⊢ 0 ∈ ℝ |
| 21 | 20 | elimel 1793 |
. . . . . . . . . 10
⊢ if(x
∈ ℝ, x, 0) ∈
ℝ |
| 22 | | 2re 4470 |
. . . . . . . . . 10
⊢ 2 ∈ ℝ |
| 23 | | 2pos 4479 |
. . . . . . . . . . 11
⊢ 0 < 2 |
| 24 | 22, 23 | gt0ne0i 4345 |
. . . . . . . . . 10
⊢ 2 ≠ 0 |
| 25 | 21, 22, 24 | redivcl 4274 |
. . . . . . . . 9
⊢ (if(x
∈ ℝ, x, 0) / 2) ∈
ℝ |
| 26 | 19, 25 | dedth 1784 |
. . . . . . . 8
⊢ (x
∈ ℝ → (x / 2) ∈
ℝ) |
| 27 | 26 | adantr 306 |
. . . . . . 7
⊢ ((x
∈ ℝ ∧ 0 < x) →
(x / 2) ∈ ℝ) |
| 28 | | breq2 2066 |
. . . . . . . . . 10
⊢ (x =
if(x ∈ ℝ, x, 0) → (0 < x ↔ 0 < if(x ∈ ℝ, x, 0))) |
| 29 | 18 | breq2d 2072 |
. . . . . . . . . 10
⊢ (x =
if(x ∈ ℝ, x, 0) → (0 < (x / 2) ↔ 0 < (if(x ∈ ℝ, x, 0) / 2))) |
| 30 | 28, 29 | imbi12d 474 |
. . . . . . . . 9
⊢ (x =
if(x ∈ ℝ, x, 0) → ((0 < x → 0 < (x / 2)) ↔ (0 < if(x ∈ ℝ, x, 0) → 0 < (if(x ∈ ℝ, x, 0) / 2)))) |
| 31 | 21, 22, 23 | divgt0lem 4389 |
. . . . . . . . 9
⊢ (0 < if(x ∈ ℝ, x, 0) → 0 < (if(x ∈ ℝ, x, 0) / 2)) |
| 32 | 30, 31 | dedth 1784 |
. . . . . . . 8
⊢ (x
∈ ℝ → (0 < x → 0
< (x / 2))) |
| 33 | 32 | imp 277 |
. . . . . . 7
⊢ ((x
∈ ℝ ∧ 0 < x) → 0
< (x / 2)) |
| 34 | 17, 27, 33 | sylc 62 |
. . . . . 6
⊢ ((x
∈ ℝ ∧ 0 < x) →
∃y ∈ ℕ ∀z ∈ ℕ (y ≤ z →
(norm ‘((F ‘z) −v A)) < (x /
2))) |
| 35 | | prth 429 |
. . . . . . . . . . . 12
⊢ (((y
≤ z → (norm ‘((F ‘z)
−v A)) <
(x / 2)) ∧ (y ≤ w →
(norm ‘((F ‘w) −v A)) < (x /
2))) → ((y ≤ z ∧ y ≤
w) → ((norm ‘((F ‘z)
−v A)) <
(x / 2) ∧ (norm ‘((F ‘w)
−v A)) <
(x / 2)))) |
| 36 | | normsubt 5091 |
. . . . . . . . . . . . . . . . 17
⊢ ((A
∈ ℋ ∧ (F ‘w) ∈ ℋ ) → (norm ‘(A −v (F ‘w))) =
(norm ‘((F ‘w) −v A))) |
| 37 | 36 | breq1d 2071 |
. . . . . . . . . . . . . . . 16
⊢ ((A
∈ ℋ ∧ (F ‘w) ∈ ℋ ) → ((norm ‘(A −v (F ‘w)))
< (x / 2) ↔ (norm ‘((F ‘w)
−v A)) <
(x / 2))) |
| 38 | 37 | anbi2d 468 |
. . . . . . . . . . . . . . 15
⊢ ((A
∈ ℋ ∧ (F ‘w) ∈ ℋ ) → (((norm ‘((F ‘z)
−v A)) <
(x / 2) ∧ (norm ‘(A −v (F ‘w)))
< (x / 2)) ↔ ((norm
‘((F ‘z) −v A)) < (x / 2)
∧ (norm ‘((F ‘w) −v A)) < (x /
2)))) |
| 39 | 38 | adantl 305 |
. . . . . . . . . . . . . 14
⊢ (((x
∈ ℝ ∧ z ∈ ℕ)
∧ (A ∈ ℋ ∧ (F ‘w)
∈ ℋ )) → (((norm ‘((F
‘z) −v
A)) < (x / 2) ∧ (norm ‘(A −v (F ‘w)))
< (x / 2)) ↔ ((norm
‘((F ‘z) −v A)) < (x / 2)
∧ (norm ‘((F ‘w) −v A)) < (x /
2)))) |
| 40 | | ffvrn 2890 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ ((F:ℕ–→ ℋ ∧ z ∈ ℕ) → (F ‘z)
∈ ℋ ) |
| 41 | 5, 40 | mpan 518 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (z
∈ ℕ → (F ‘z) ∈ ℋ ) |
| 42 | 41 | anim1i 269 |
. . . . . . . . . . . . . . . . . . . 20
⊢ ((z
∈ ℕ ∧ (F ‘w) ∈ ℋ ) → ((F ‘z)
∈ ℋ ∧ (F ‘w) ∈ ℋ )) |
| 43 | 42 | ancoms 334 |
. . . . . . . . . . . . . . . . . . 19
⊢ (((F
‘w) ∈ ℋ ∧ z ∈ ℕ) → ((F ‘z)
∈ ℋ ∧ (F ‘w) ∈ ℋ )) |
| 44 | 43 | anim1i 269 |
. . . . . . . . . . . . . . . . . 18
⊢ ((((F
‘w) ∈ ℋ ∧ z ∈ ℕ) ∧ (A ∈ ℋ ∧ x ∈ ℝ)) → (((F ‘z)
∈ ℋ ∧ (F ‘w) ∈ ℋ ) ∧ (A ∈ ℋ ∧ x ∈ ℝ))) |
| 45 | 44 | ancoms 334 |
. . . . . . . . . . . . . . . . 17
⊢ (((A
∈ ℋ ∧ x ∈ ℝ)
∧ ((F ‘w) ∈ ℋ ∧ z ∈ ℕ)) → (((F ‘z)
∈ ℋ ∧ (F ‘w) ∈ ℋ ) ∧ (A ∈ ℋ ∧ x ∈ ℝ))) |
| 46 | 45 | an4s 390 |
. . . . . . . . . . . . . . . 16
⊢ (((A
∈ ℋ ∧ (F ‘w) ∈ ℋ ) ∧ (x ∈ ℝ ∧ z ∈ ℕ)) → (((F ‘z)
∈ ℋ ∧ (F ‘w) ∈ ℋ ) ∧ (A ∈ ℋ ∧ x ∈ ℝ))) |
| 47 | 46 | ancoms 334 |
. . . . . . . . . . . . . . 15
⊢ (((x
∈ ℝ ∧ z ∈ ℕ)
∧ (A ∈ ℋ ∧ (F ‘w)
∈ ℋ )) → (((F
‘z) ∈ ℋ ∧ (F ‘w)
∈ ℋ ) ∧ (A ∈ ℋ
∧ x ∈ ℝ))) |
| 48 | | norm3lemt 5097 |
. . . . . . . . . . . . . . 15
⊢ ((((F
‘z) ∈ ℋ ∧ (F ‘w)
∈ ℋ ) ∧ (A ∈ ℋ
∧ x ∈ ℝ)) → (((norm
‘((F ‘z) −v A)) < (x / 2)
∧ (norm ‘(A
−v (F
‘w))) < (x / 2)) → (norm ‘((F ‘z)
−v (F
‘w))) < x)) |
| 49 | 47, 48 | syl 12 |
. . . . . . . . . . . . . 14
⊢ (((x
∈ ℝ ∧ z ∈ ℕ)
∧ (A ∈ ℋ ∧ (F ‘w)
∈ ℋ )) → (((norm ‘((F
‘z) −v
A)) < (x / 2) ∧ (norm ‘(A −v (F ‘w)))
< (x / 2)) → (norm
‘((F ‘z) −v (F ‘w)))
< x)) |
| 50 | 39, 49 | sylbird 180 |
. . . . . . . . . . . . 13
⊢ (((x
∈ ℝ ∧ z ∈ ℕ)
∧ (A ∈ ℋ ∧ (F ‘w)
∈ ℋ )) → (((norm ‘((F
‘z) −v
A)) < (x / 2) ∧ (norm ‘((F ‘w)
−v A)) <
(x / 2)) → (norm ‘((F ‘z)
−v (F
‘w))) < x)) |
| 51 | | ffvrn 2890 |
. . . . . . . . . . . . . . 15
⊢ ((F:ℕ–→ ℋ ∧ w ∈ ℕ) → (F ‘w)
∈ ℋ ) |
| 52 | 5, 51 | mpan 518 |
. . . . . . . . . . . . . 14
⊢ (w
∈ ℕ → (F ‘w) ∈ ℋ ) |
| 53 | 52, 13 | jctil 240 |
. . . . . . . . . . . . 13
⊢ (w
∈ ℕ → (A ∈ ℋ
∧ (F ‘w) ∈ ℋ )) |
| 54 | 50, 53 | sylan2 346 |
. . . . . . . . . . . 12
⊢ (((x
∈ ℝ ∧ z ∈ ℕ)
∧ w ∈ ℕ) → (((norm
‘((F ‘z) −v A)) < (x / 2)
∧ (norm ‘((F ‘w) −v A)) < (x /
2)) → (norm ‘((F ‘z) −v (F ‘w)))
< x)) |
| 55 | 35, 54 | syl9r 56 |
. . . . . . . . . . 11
⊢ (((x
∈ ℝ ∧ z ∈ ℕ)
∧ w ∈ ℕ) → (((y ≤ z →
(norm ‘((F ‘z) −v A)) < (x /
2)) ∧ (y ≤ w → (norm ‘((F ‘w)
−v A)) <
(x / 2))) → ((y ≤ z ∧
y ≤ w) → (norm ‘((F ‘z)
−v (F
‘w))) < x))) |
| 56 | 55 | r19.20dva 1256 |
. . . . . . . . . 10
⊢ ((x
∈ ℝ ∧ z ∈ ℕ)
→ (∀w ∈ ℕ ((y ≤ z →
(norm ‘((F ‘z) −v A)) < (x /
2)) ∧ (y ≤ w → (norm ‘((F ‘w)
−v A)) <
(x / 2))) → ∀w ∈ ℕ ((y ≤ z ∧
y ≤ w) → (norm ‘((F ‘z)
−v (F
‘w))) < x))) |
| 57 | 56 | r19.20dva 1256 |
. . . . . . . . 9
⊢ (x
∈ ℝ → (∀z ∈
ℕ ∀w ∈ ℕ ((y ≤ z →
(norm ‘((F ‘z) −v A)) < (x /
2)) ∧ (y ≤ w → (norm ‘((F ‘w)
−v A)) <
(x / 2))) → ∀z ∈ ℕ ∀w ∈ ℕ ((y ≤ z ∧
y ≤ w) → (norm ‘((F ‘z)
−v (F
‘w))) < x))) |
| 58 | | raaan 1775 |
. . . . . . . . . 10
⊢ (∀z ∈ ℕ ∀w ∈ ℕ ((y ≤ z →
(norm ‘((F ‘z) −v A)) < (x /
2)) ∧ (y ≤ w → (norm ‘((F ‘w)
−v A)) <
(x / 2))) ↔ (∀z ∈ ℕ (y ≤ z →
(norm ‘((F ‘z) −v A)) < (x /
2)) ∧ ∀w ∈ ℕ
(y ≤ w → (norm ‘((F ‘w)
−v A)) <
(x / 2)))) |
| 59 | | breq2 2066 |
. . . . . . . . . . . . 13
⊢ (w =
z → (y ≤ w ↔
y ≤ z)) |
| 60 | | fveq2 2832 |
. . . . . . . . . . . . . . . 16
⊢ (w =
z → (F ‘w) =
(F ‘z)) |
| 61 | 60 | opreq1d 3012 |
. . . . . . . . . . . . . . 15
⊢ (w =
z → ((F ‘w)
−v A) = ((F ‘z)
−v A)) |
| 62 | 61 | fveq2d 2836 |
. . . . . . . . . . . . . 14
⊢ (w =
z → (norm ‘((F ‘w)
−v A)) = (norm
‘((F ‘z) −v A))) |
| 63 | 62 | breq1d 2071 |
. . . . . . . . . . . . 13
⊢ (w =
z → ((norm ‘((F ‘w)
−v A)) <
(x / 2) ↔ (norm ‘((F ‘z)
−v A)) <
(x / 2))) |
| 64 | 59, 63 | imbi12d 474 |
. . . . . . . . . . . 12
⊢ (w =
z → ((y ≤ w →
(norm ‘((F ‘w) −v A)) < (x /
2)) ↔ (y ≤ z → (norm ‘((F ‘z)
−v A)) <
(x / 2)))) |
| 65 | 64 | cbvralv 1333 |
. . . . . . . . . . 11
⊢ (∀w ∈ ℕ (y ≤ w →
(norm ‘((F ‘w) −v A)) < (x /
2)) ↔ ∀z ∈ ℕ
(y ≤ z → (norm ‘((F ‘z)
−v A)) <
(x / 2))) |
| 66 | 65 | anbi2i 367 |
. . . . . . . . . 10
⊢ ((∀z ∈ ℕ (y ≤ z →
(norm ‘((F ‘z) −v A)) < (x /
2)) ∧ ∀w ∈ ℕ
(y ≤ w → (norm ‘((F ‘w)
−v A)) <
(x / 2))) ↔ (∀z ∈ ℕ (y ≤ z →
(norm ‘((F ‘z) −v A)) < (x /
2)) ∧ ∀z ∈ ℕ
(y ≤ z → (norm ‘((F ‘z)
−v A)) <
(x / 2)))) |
| 67 | | anidm 331 |
. . . . . . . . . 10
⊢ ((∀z ∈ ℕ (y ≤ z →
(norm ‘((F ‘z) −v A)) < (x /
2)) ∧ ∀z ∈ ℕ
(y ≤ z → (norm ‘((F ‘z)
−v A)) <
(x / 2))) ↔ ∀z ∈ ℕ (y ≤ z →
(norm ‘((F ‘z) −v A)) < (x /
2))) |
| 68 | 58, 66, 67 | 3bitr 155 |
. . . . . . . . 9
⊢ (∀z ∈ ℕ ∀w ∈ ℕ ((y ≤ z →
(norm ‘((F ‘z) −v A)) < (x /
2)) ∧ (y ≤ w → (norm ‘((F ‘w)
−v A)) <
(x / 2))) ↔ ∀z ∈ ℕ (y ≤ z →
(norm ‘((F ‘z) −v A)) < (x /
2))) |
| 69 | 57, 68 | syl5ibr 182 |
. . . . . . . 8
⊢ (x
∈ ℝ → (∀z ∈
ℕ (y ≤ z → (norm ‘((F ‘z)
−v A)) <
(x / 2)) → ∀z ∈ ℕ ∀w ∈ ℕ ((y ≤ z ∧
y ≤ w) → (norm ‘((F ‘z)
−v (F
‘w))) < x))) |
| 70 | 69 | r19.22sdv 1279 |
. . . . . . 7
⊢ (x
∈ ℝ → (∃y ∈
ℕ ∀z ∈ ℕ (y ≤ z →
(norm ‘((F ‘z) −v A)) < (x /
2)) → ∃y ∈ ℕ
∀z ∈ ℕ ∀w ∈ ℕ ((y ≤ z ∧
y ≤ w) → (norm ‘((F ‘z)
−v (F
‘w))) < x))) |
| 71 | 70 | adantr 306 |
. . . . . 6
⊢ ((x
∈ ℝ ∧ 0 < x) →
(∃y ∈ ℕ ∀z ∈ ℕ (y ≤ z →
(norm ‘((F ‘z) −v A)) < (x /
2)) → ∃y ∈ ℕ
∀z ∈ ℕ ∀w ∈ ℕ ((y ≤ z ∧
y ≤ w) → (norm ‘((F ‘z)
−v (F
‘w))) < x))) |
| 72 | 34, 71 | mpd 46 |
. . . . 5
⊢ ((x
∈ ℝ ∧ 0 < x) →
∃y ∈ ℕ ∀z ∈ ℕ ∀w ∈ ℕ ((y ≤ z ∧
y ≤ w) → (norm ‘((F ‘z)
−v (F
‘w))) < x)) |
| 73 | 72 | exp 291 |
. . . 4
⊢ (x
∈ ℝ → (0 < x →
∃y ∈ ℕ ∀z ∈ ℕ ∀w ∈ ℕ ((y ≤ z ∧
y ≤ w) → (norm ‘((F ‘z)
−v (F
‘w))) < x))) |
| 74 | 73 | rgen 1247 |
. . 3
⊢ ∀x ∈ ℝ (0 < x → ∃y ∈ ℕ ∀z ∈ ℕ ∀w ∈ ℕ ((y ≤ z ∧
y ≤ w) → (norm ‘((F ‘z)
−v (F
‘w))) < x)) |
| 75 | 5, 74 | pm3.2i 234 |
. 2
⊢ (F:ℕ–→ ℋ ∧
∀x ∈ ℝ (0 < x → ∃y ∈ ℕ ∀z ∈ ℕ ∀w ∈ ℕ ((y ≤ z ∧
y ≤ w) → (norm ‘((F ‘z)
−v (F
‘w))) < x))) |
| 76 | | hcauchy 5103 |
. 2
⊢ (F
∈ Cauchy ↔ (F:ℕ–→ ℋ ∧
∀x ∈ ℝ (0 < x → ∃y ∈ ℕ ∀z ∈ ℕ ∀w ∈ ℕ ((y ≤ z ∧
y ≤ w) → (norm ‘((F ‘z)
−v (F
‘w))) < x)))) |
| 77 | 75, 76 | mpbir 165 |
1
⊢ F
∈ Cauchy |