Proof of Theorem caucvgprlemm
Step | Hyp | Ref
| Expression |
1 | | fveq2 5486 |
. . . . . 6
⊢ (𝑗 = 1o → (𝐹‘𝑗) = (𝐹‘1o)) |
2 | 1 | breq2d 3994 |
. . . . 5
⊢ (𝑗 = 1o → (𝐴 <Q
(𝐹‘𝑗) ↔ 𝐴 <Q (𝐹‘1o))) |
3 | | caucvgpr.bnd |
. . . . 5
⊢ (𝜑 → ∀𝑗 ∈ N 𝐴 <Q (𝐹‘𝑗)) |
4 | | 1pi 7256 |
. . . . . 6
⊢
1o ∈ N |
5 | 4 | a1i 9 |
. . . . 5
⊢ (𝜑 → 1o ∈
N) |
6 | 2, 3, 5 | rspcdva 2835 |
. . . 4
⊢ (𝜑 → 𝐴 <Q (𝐹‘1o)) |
7 | | ltrelnq 7306 |
. . . . . 6
⊢
<Q ⊆ (Q ×
Q) |
8 | 7 | brel 4656 |
. . . . 5
⊢ (𝐴 <Q
(𝐹‘1o)
→ (𝐴 ∈
Q ∧ (𝐹‘1o) ∈
Q)) |
9 | 8 | simpld 111 |
. . . 4
⊢ (𝐴 <Q
(𝐹‘1o)
→ 𝐴 ∈
Q) |
10 | | halfnqq 7351 |
. . . 4
⊢ (𝐴 ∈ Q →
∃𝑠 ∈
Q (𝑠
+Q 𝑠) = 𝐴) |
11 | 6, 9, 10 | 3syl 17 |
. . 3
⊢ (𝜑 → ∃𝑠 ∈ Q (𝑠 +Q 𝑠) = 𝐴) |
12 | | simplr 520 |
. . . . . 6
⊢ (((𝜑 ∧ 𝑠 ∈ Q) ∧ (𝑠 +Q
𝑠) = 𝐴) → 𝑠 ∈ Q) |
13 | | archrecnq 7604 |
. . . . . . . 8
⊢ (𝑠 ∈ Q →
∃𝑗 ∈
N (*Q‘[〈𝑗, 1o〉]
~Q ) <Q 𝑠) |
14 | 12, 13 | syl 14 |
. . . . . . 7
⊢ (((𝜑 ∧ 𝑠 ∈ Q) ∧ (𝑠 +Q
𝑠) = 𝐴) → ∃𝑗 ∈ N
(*Q‘[〈𝑗, 1o〉]
~Q ) <Q 𝑠) |
15 | | simpr 109 |
. . . . . . . . . . . 12
⊢
(((((𝜑 ∧ 𝑠 ∈ Q) ∧
(𝑠
+Q 𝑠) = 𝐴) ∧ 𝑗 ∈ N) ∧
(*Q‘[〈𝑗, 1o〉]
~Q ) <Q 𝑠) →
(*Q‘[〈𝑗, 1o〉]
~Q ) <Q 𝑠) |
16 | | simplr 520 |
. . . . . . . . . . . . . 14
⊢
(((((𝜑 ∧ 𝑠 ∈ Q) ∧
(𝑠
+Q 𝑠) = 𝐴) ∧ 𝑗 ∈ N) ∧
(*Q‘[〈𝑗, 1o〉]
~Q ) <Q 𝑠) → 𝑗 ∈ N) |
17 | | nnnq 7363 |
. . . . . . . . . . . . . 14
⊢ (𝑗 ∈ N →
[〈𝑗,
1o〉] ~Q ∈
Q) |
18 | | recclnq 7333 |
. . . . . . . . . . . . . 14
⊢
([〈𝑗,
1o〉] ~Q ∈ Q →
(*Q‘[〈𝑗, 1o〉]
~Q ) ∈ Q) |
19 | 16, 17, 18 | 3syl 17 |
. . . . . . . . . . . . 13
⊢
(((((𝜑 ∧ 𝑠 ∈ Q) ∧
(𝑠
+Q 𝑠) = 𝐴) ∧ 𝑗 ∈ N) ∧
(*Q‘[〈𝑗, 1o〉]
~Q ) <Q 𝑠) →
(*Q‘[〈𝑗, 1o〉]
~Q ) ∈ Q) |
20 | 12 | ad2antrr 480 |
. . . . . . . . . . . . 13
⊢
(((((𝜑 ∧ 𝑠 ∈ Q) ∧
(𝑠
+Q 𝑠) = 𝐴) ∧ 𝑗 ∈ N) ∧
(*Q‘[〈𝑗, 1o〉]
~Q ) <Q 𝑠) → 𝑠 ∈ Q) |
21 | | ltanqg 7341 |
. . . . . . . . . . . . 13
⊢
(((*Q‘[〈𝑗, 1o〉]
~Q ) ∈ Q ∧ 𝑠 ∈ Q ∧ 𝑠 ∈ Q) →
((*Q‘[〈𝑗, 1o〉]
~Q ) <Q 𝑠 ↔ (𝑠 +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (𝑠 +Q
𝑠))) |
22 | 19, 20, 20, 21 | syl3anc 1228 |
. . . . . . . . . . . 12
⊢
(((((𝜑 ∧ 𝑠 ∈ Q) ∧
(𝑠
+Q 𝑠) = 𝐴) ∧ 𝑗 ∈ N) ∧
(*Q‘[〈𝑗, 1o〉]
~Q ) <Q 𝑠) →
((*Q‘[〈𝑗, 1o〉]
~Q ) <Q 𝑠 ↔ (𝑠 +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (𝑠 +Q
𝑠))) |
23 | 15, 22 | mpbid 146 |
. . . . . . . . . . 11
⊢
(((((𝜑 ∧ 𝑠 ∈ Q) ∧
(𝑠
+Q 𝑠) = 𝐴) ∧ 𝑗 ∈ N) ∧
(*Q‘[〈𝑗, 1o〉]
~Q ) <Q 𝑠) → (𝑠 +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (𝑠 +Q
𝑠)) |
24 | | simpllr 524 |
. . . . . . . . . . 11
⊢
(((((𝜑 ∧ 𝑠 ∈ Q) ∧
(𝑠
+Q 𝑠) = 𝐴) ∧ 𝑗 ∈ N) ∧
(*Q‘[〈𝑗, 1o〉]
~Q ) <Q 𝑠) → (𝑠 +Q 𝑠) = 𝐴) |
25 | 23, 24 | breqtrd 4008 |
. . . . . . . . . 10
⊢
(((((𝜑 ∧ 𝑠 ∈ Q) ∧
(𝑠
+Q 𝑠) = 𝐴) ∧ 𝑗 ∈ N) ∧
(*Q‘[〈𝑗, 1o〉]
~Q ) <Q 𝑠) → (𝑠 +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q 𝐴) |
26 | | rsp 2513 |
. . . . . . . . . . . . 13
⊢
(∀𝑗 ∈
N 𝐴
<Q (𝐹‘𝑗) → (𝑗 ∈ N → 𝐴 <Q
(𝐹‘𝑗))) |
27 | 3, 26 | syl 14 |
. . . . . . . . . . . 12
⊢ (𝜑 → (𝑗 ∈ N → 𝐴 <Q
(𝐹‘𝑗))) |
28 | 27 | ad4antr 486 |
. . . . . . . . . . 11
⊢
(((((𝜑 ∧ 𝑠 ∈ Q) ∧
(𝑠
+Q 𝑠) = 𝐴) ∧ 𝑗 ∈ N) ∧
(*Q‘[〈𝑗, 1o〉]
~Q ) <Q 𝑠) → (𝑗 ∈ N → 𝐴 <Q
(𝐹‘𝑗))) |
29 | 16, 28 | mpd 13 |
. . . . . . . . . 10
⊢
(((((𝜑 ∧ 𝑠 ∈ Q) ∧
(𝑠
+Q 𝑠) = 𝐴) ∧ 𝑗 ∈ N) ∧
(*Q‘[〈𝑗, 1o〉]
~Q ) <Q 𝑠) → 𝐴 <Q (𝐹‘𝑗)) |
30 | | ltsonq 7339 |
. . . . . . . . . . 11
⊢
<Q Or Q |
31 | 30, 7 | sotri 4999 |
. . . . . . . . . 10
⊢ (((𝑠 +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q 𝐴 ∧ 𝐴 <Q (𝐹‘𝑗)) → (𝑠 +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (𝐹‘𝑗)) |
32 | 25, 29, 31 | syl2anc 409 |
. . . . . . . . 9
⊢
(((((𝜑 ∧ 𝑠 ∈ Q) ∧
(𝑠
+Q 𝑠) = 𝐴) ∧ 𝑗 ∈ N) ∧
(*Q‘[〈𝑗, 1o〉]
~Q ) <Q 𝑠) → (𝑠 +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (𝐹‘𝑗)) |
33 | 32 | ex 114 |
. . . . . . . 8
⊢ ((((𝜑 ∧ 𝑠 ∈ Q) ∧ (𝑠 +Q
𝑠) = 𝐴) ∧ 𝑗 ∈ N) →
((*Q‘[〈𝑗, 1o〉]
~Q ) <Q 𝑠 → (𝑠 +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (𝐹‘𝑗))) |
34 | 33 | reximdva 2568 |
. . . . . . 7
⊢ (((𝜑 ∧ 𝑠 ∈ Q) ∧ (𝑠 +Q
𝑠) = 𝐴) → (∃𝑗 ∈ N
(*Q‘[〈𝑗, 1o〉]
~Q ) <Q 𝑠 → ∃𝑗 ∈ N (𝑠 +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (𝐹‘𝑗))) |
35 | 14, 34 | mpd 13 |
. . . . . 6
⊢ (((𝜑 ∧ 𝑠 ∈ Q) ∧ (𝑠 +Q
𝑠) = 𝐴) → ∃𝑗 ∈ N (𝑠 +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (𝐹‘𝑗)) |
36 | | oveq1 5849 |
. . . . . . . . 9
⊢ (𝑙 = 𝑠 → (𝑙 +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) = (𝑠 +Q
(*Q‘[〈𝑗, 1o〉]
~Q ))) |
37 | 36 | breq1d 3992 |
. . . . . . . 8
⊢ (𝑙 = 𝑠 → ((𝑙 +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (𝐹‘𝑗) ↔ (𝑠 +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (𝐹‘𝑗))) |
38 | 37 | rexbidv 2467 |
. . . . . . 7
⊢ (𝑙 = 𝑠 → (∃𝑗 ∈ N (𝑙 +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (𝐹‘𝑗) ↔ ∃𝑗 ∈ N (𝑠 +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (𝐹‘𝑗))) |
39 | | caucvgpr.lim |
. . . . . . . . 9
⊢ 𝐿 = 〈{𝑙 ∈ Q ∣ ∃𝑗 ∈ N (𝑙 +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (𝐹‘𝑗)}, {𝑢 ∈ Q ∣ ∃𝑗 ∈ N ((𝐹‘𝑗) +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q 𝑢}〉 |
40 | 39 | fveq2i 5489 |
. . . . . . . 8
⊢
(1st ‘𝐿) = (1st ‘〈{𝑙 ∈ Q ∣
∃𝑗 ∈
N (𝑙
+Q (*Q‘[〈𝑗, 1o〉]
~Q )) <Q (𝐹‘𝑗)}, {𝑢 ∈ Q ∣ ∃𝑗 ∈ N ((𝐹‘𝑗) +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q 𝑢}〉) |
41 | | nqex 7304 |
. . . . . . . . . 10
⊢
Q ∈ V |
42 | 41 | rabex 4126 |
. . . . . . . . 9
⊢ {𝑙 ∈ Q ∣
∃𝑗 ∈
N (𝑙
+Q (*Q‘[〈𝑗, 1o〉]
~Q )) <Q (𝐹‘𝑗)} ∈ V |
43 | 41 | rabex 4126 |
. . . . . . . . 9
⊢ {𝑢 ∈ Q ∣
∃𝑗 ∈
N ((𝐹‘𝑗) +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q 𝑢} ∈ V |
44 | 42, 43 | op1st 6114 |
. . . . . . . 8
⊢
(1st ‘〈{𝑙 ∈ Q ∣ ∃𝑗 ∈ N (𝑙 +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (𝐹‘𝑗)}, {𝑢 ∈ Q ∣ ∃𝑗 ∈ N ((𝐹‘𝑗) +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q 𝑢}〉) = {𝑙 ∈ Q ∣ ∃𝑗 ∈ N (𝑙 +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (𝐹‘𝑗)} |
45 | 40, 44 | eqtri 2186 |
. . . . . . 7
⊢
(1st ‘𝐿) = {𝑙 ∈ Q ∣ ∃𝑗 ∈ N (𝑙 +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (𝐹‘𝑗)} |
46 | 38, 45 | elrab2 2885 |
. . . . . 6
⊢ (𝑠 ∈ (1st
‘𝐿) ↔ (𝑠 ∈ Q ∧
∃𝑗 ∈
N (𝑠
+Q (*Q‘[〈𝑗, 1o〉]
~Q )) <Q (𝐹‘𝑗))) |
47 | 12, 35, 46 | sylanbrc 414 |
. . . . 5
⊢ (((𝜑 ∧ 𝑠 ∈ Q) ∧ (𝑠 +Q
𝑠) = 𝐴) → 𝑠 ∈ (1st ‘𝐿)) |
48 | 47 | ex 114 |
. . . 4
⊢ ((𝜑 ∧ 𝑠 ∈ Q) → ((𝑠 +Q
𝑠) = 𝐴 → 𝑠 ∈ (1st ‘𝐿))) |
49 | 48 | reximdva 2568 |
. . 3
⊢ (𝜑 → (∃𝑠 ∈ Q (𝑠 +Q 𝑠) = 𝐴 → ∃𝑠 ∈ Q 𝑠 ∈ (1st ‘𝐿))) |
50 | 11, 49 | mpd 13 |
. 2
⊢ (𝜑 → ∃𝑠 ∈ Q 𝑠 ∈ (1st ‘𝐿)) |
51 | | caucvgpr.f |
. . . . . 6
⊢ (𝜑 → 𝐹:N⟶Q) |
52 | 51, 5 | ffvelrnd 5621 |
. . . . 5
⊢ (𝜑 → (𝐹‘1o) ∈
Q) |
53 | | 1nq 7307 |
. . . . 5
⊢
1Q ∈ Q |
54 | | addclnq 7316 |
. . . . 5
⊢ (((𝐹‘1o) ∈
Q ∧ 1Q ∈ Q)
→ ((𝐹‘1o)
+Q 1Q) ∈
Q) |
55 | 52, 53, 54 | sylancl 410 |
. . . 4
⊢ (𝜑 → ((𝐹‘1o)
+Q 1Q) ∈
Q) |
56 | | addclnq 7316 |
. . . 4
⊢ ((((𝐹‘1o)
+Q 1Q) ∈ Q
∧ 1Q ∈ Q) → (((𝐹‘1o)
+Q 1Q)
+Q 1Q) ∈
Q) |
57 | 55, 53, 56 | sylancl 410 |
. . 3
⊢ (𝜑 → (((𝐹‘1o)
+Q 1Q)
+Q 1Q) ∈
Q) |
58 | | df-1nqqs 7292 |
. . . . . . . . 9
⊢
1Q = [〈1o, 1o〉]
~Q |
59 | 58 | fveq2i 5489 |
. . . . . . . 8
⊢
(*Q‘1Q) =
(*Q‘[〈1o, 1o〉]
~Q ) |
60 | | rec1nq 7336 |
. . . . . . . 8
⊢
(*Q‘1Q) =
1Q |
61 | 59, 60 | eqtr3i 2188 |
. . . . . . 7
⊢
(*Q‘[〈1o,
1o〉] ~Q ) =
1Q |
62 | 61 | oveq2i 5853 |
. . . . . 6
⊢ ((𝐹‘1o)
+Q
(*Q‘[〈1o, 1o〉]
~Q )) = ((𝐹‘1o)
+Q 1Q) |
63 | | ltaddnq 7348 |
. . . . . . 7
⊢ ((((𝐹‘1o)
+Q 1Q) ∈ Q
∧ 1Q ∈ Q) → ((𝐹‘1o)
+Q 1Q)
<Q (((𝐹‘1o)
+Q 1Q)
+Q 1Q)) |
64 | 55, 53, 63 | sylancl 410 |
. . . . . 6
⊢ (𝜑 → ((𝐹‘1o)
+Q 1Q)
<Q (((𝐹‘1o)
+Q 1Q)
+Q 1Q)) |
65 | 62, 64 | eqbrtrid 4017 |
. . . . 5
⊢ (𝜑 → ((𝐹‘1o)
+Q
(*Q‘[〈1o, 1o〉]
~Q )) <Q (((𝐹‘1o)
+Q 1Q)
+Q 1Q)) |
66 | | opeq1 3758 |
. . . . . . . . . 10
⊢ (𝑗 = 1o →
〈𝑗,
1o〉 = 〈1o,
1o〉) |
67 | 66 | eceq1d 6537 |
. . . . . . . . 9
⊢ (𝑗 = 1o →
[〈𝑗,
1o〉] ~Q = [〈1o,
1o〉] ~Q ) |
68 | 67 | fveq2d 5490 |
. . . . . . . 8
⊢ (𝑗 = 1o →
(*Q‘[〈𝑗, 1o〉]
~Q ) =
(*Q‘[〈1o, 1o〉]
~Q )) |
69 | 1, 68 | oveq12d 5860 |
. . . . . . 7
⊢ (𝑗 = 1o → ((𝐹‘𝑗) +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) = ((𝐹‘1o)
+Q
(*Q‘[〈1o, 1o〉]
~Q ))) |
70 | 69 | breq1d 3992 |
. . . . . 6
⊢ (𝑗 = 1o → (((𝐹‘𝑗) +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (((𝐹‘1o)
+Q 1Q)
+Q 1Q) ↔ ((𝐹‘1o)
+Q
(*Q‘[〈1o, 1o〉]
~Q )) <Q (((𝐹‘1o)
+Q 1Q)
+Q 1Q))) |
71 | 70 | rspcev 2830 |
. . . . 5
⊢
((1o ∈ N ∧ ((𝐹‘1o)
+Q
(*Q‘[〈1o, 1o〉]
~Q )) <Q (((𝐹‘1o)
+Q 1Q)
+Q 1Q)) → ∃𝑗 ∈ N ((𝐹‘𝑗) +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (((𝐹‘1o)
+Q 1Q)
+Q 1Q)) |
72 | 5, 65, 71 | syl2anc 409 |
. . . 4
⊢ (𝜑 → ∃𝑗 ∈ N ((𝐹‘𝑗) +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (((𝐹‘1o)
+Q 1Q)
+Q 1Q)) |
73 | | breq2 3986 |
. . . . . 6
⊢ (𝑢 = (((𝐹‘1o)
+Q 1Q)
+Q 1Q) → (((𝐹‘𝑗) +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q 𝑢 ↔ ((𝐹‘𝑗) +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (((𝐹‘1o)
+Q 1Q)
+Q 1Q))) |
74 | 73 | rexbidv 2467 |
. . . . 5
⊢ (𝑢 = (((𝐹‘1o)
+Q 1Q)
+Q 1Q) → (∃𝑗 ∈ N ((𝐹‘𝑗) +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q 𝑢 ↔ ∃𝑗 ∈ N ((𝐹‘𝑗) +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (((𝐹‘1o)
+Q 1Q)
+Q 1Q))) |
75 | 39 | fveq2i 5489 |
. . . . . 6
⊢
(2nd ‘𝐿) = (2nd ‘〈{𝑙 ∈ Q ∣
∃𝑗 ∈
N (𝑙
+Q (*Q‘[〈𝑗, 1o〉]
~Q )) <Q (𝐹‘𝑗)}, {𝑢 ∈ Q ∣ ∃𝑗 ∈ N ((𝐹‘𝑗) +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q 𝑢}〉) |
76 | 42, 43 | op2nd 6115 |
. . . . . 6
⊢
(2nd ‘〈{𝑙 ∈ Q ∣ ∃𝑗 ∈ N (𝑙 +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (𝐹‘𝑗)}, {𝑢 ∈ Q ∣ ∃𝑗 ∈ N ((𝐹‘𝑗) +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q 𝑢}〉) = {𝑢 ∈ Q ∣ ∃𝑗 ∈ N ((𝐹‘𝑗) +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q 𝑢} |
77 | 75, 76 | eqtri 2186 |
. . . . 5
⊢
(2nd ‘𝐿) = {𝑢 ∈ Q ∣ ∃𝑗 ∈ N ((𝐹‘𝑗) +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q 𝑢} |
78 | 74, 77 | elrab2 2885 |
. . . 4
⊢ ((((𝐹‘1o)
+Q 1Q)
+Q 1Q) ∈ (2nd
‘𝐿) ↔ ((((𝐹‘1o)
+Q 1Q)
+Q 1Q) ∈ Q
∧ ∃𝑗 ∈
N ((𝐹‘𝑗) +Q
(*Q‘[〈𝑗, 1o〉]
~Q )) <Q (((𝐹‘1o)
+Q 1Q)
+Q 1Q))) |
79 | 57, 72, 78 | sylanbrc 414 |
. . 3
⊢ (𝜑 → (((𝐹‘1o)
+Q 1Q)
+Q 1Q) ∈ (2nd
‘𝐿)) |
80 | | eleq1 2229 |
. . . 4
⊢ (𝑟 = (((𝐹‘1o)
+Q 1Q)
+Q 1Q) → (𝑟 ∈ (2nd
‘𝐿) ↔ (((𝐹‘1o)
+Q 1Q)
+Q 1Q) ∈ (2nd
‘𝐿))) |
81 | 80 | rspcev 2830 |
. . 3
⊢
(((((𝐹‘1o)
+Q 1Q)
+Q 1Q) ∈ Q
∧ (((𝐹‘1o)
+Q 1Q)
+Q 1Q) ∈ (2nd
‘𝐿)) →
∃𝑟 ∈
Q 𝑟 ∈
(2nd ‘𝐿)) |
82 | 57, 79, 81 | syl2anc 409 |
. 2
⊢ (𝜑 → ∃𝑟 ∈ Q 𝑟 ∈ (2nd ‘𝐿)) |
83 | 50, 82 | jca 304 |
1
⊢ (𝜑 → (∃𝑠 ∈ Q 𝑠 ∈ (1st ‘𝐿) ∧ ∃𝑟 ∈ Q 𝑟 ∈ (2nd
‘𝐿))) |