| Step |
Hyp |
Ref |
Expression |
| 1 |
|
eluzelz |
⊢ ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) → 𝑁 ∈ ℤ ) |
| 2 |
1
|
3ad2ant1 |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → 𝑁 ∈ ℤ ) |
| 3 |
|
elfzoelz |
⊢ ( 𝐴 ∈ ( 2 ..^ 𝑁 ) → 𝐴 ∈ ℤ ) |
| 4 |
|
id |
⊢ ( 𝐴 ∈ ℤ → 𝐴 ∈ ℤ ) |
| 5 |
|
2z |
⊢ 2 ∈ ℤ |
| 6 |
5
|
a1i |
⊢ ( 𝐴 ∈ ℤ → 2 ∈ ℤ ) |
| 7 |
6 4
|
zmulcld |
⊢ ( 𝐴 ∈ ℤ → ( 2 · 𝐴 ) ∈ ℤ ) |
| 8 |
4 7
|
zmulcld |
⊢ ( 𝐴 ∈ ℤ → ( 𝐴 · ( 2 · 𝐴 ) ) ∈ ℤ ) |
| 9 |
3 8
|
syl |
⊢ ( 𝐴 ∈ ( 2 ..^ 𝑁 ) → ( 𝐴 · ( 2 · 𝐴 ) ) ∈ ℤ ) |
| 10 |
9
|
3ad2ant2 |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → ( 𝐴 · ( 2 · 𝐴 ) ) ∈ ℤ ) |
| 11 |
|
1z |
⊢ 1 ∈ ℤ |
| 12 |
|
6nn |
⊢ 6 ∈ ℕ |
| 13 |
12
|
nnzi |
⊢ 6 ∈ ℤ |
| 14 |
|
1re |
⊢ 1 ∈ ℝ |
| 15 |
|
6re |
⊢ 6 ∈ ℝ |
| 16 |
|
1lt6 |
⊢ 1 < 6 |
| 17 |
14 15 16
|
ltleii |
⊢ 1 ≤ 6 |
| 18 |
|
eluz2 |
⊢ ( 6 ∈ ( ℤ≥ ‘ 1 ) ↔ ( 1 ∈ ℤ ∧ 6 ∈ ℤ ∧ 1 ≤ 6 ) ) |
| 19 |
11 13 17 18
|
mpbir3an |
⊢ 6 ∈ ( ℤ≥ ‘ 1 ) |
| 20 |
|
uzss |
⊢ ( 6 ∈ ( ℤ≥ ‘ 1 ) → ( ℤ≥ ‘ 6 ) ⊆ ( ℤ≥ ‘ 1 ) ) |
| 21 |
19 20
|
ax-mp |
⊢ ( ℤ≥ ‘ 6 ) ⊆ ( ℤ≥ ‘ 1 ) |
| 22 |
21
|
sseli |
⊢ ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) → 𝑁 ∈ ( ℤ≥ ‘ 1 ) ) |
| 23 |
|
elnnuz |
⊢ ( 𝑁 ∈ ℕ ↔ 𝑁 ∈ ( ℤ≥ ‘ 1 ) ) |
| 24 |
22 23
|
sylibr |
⊢ ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) → 𝑁 ∈ ℕ ) |
| 25 |
24
|
3ad2ant1 |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → 𝑁 ∈ ℕ ) |
| 26 |
|
nnm1nn0 |
⊢ ( 𝑁 ∈ ℕ → ( 𝑁 − 1 ) ∈ ℕ0 ) |
| 27 |
25 26
|
syl |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → ( 𝑁 − 1 ) ∈ ℕ0 ) |
| 28 |
27
|
faccld |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → ( ! ‘ ( 𝑁 − 1 ) ) ∈ ℕ ) |
| 29 |
28
|
nnzd |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → ( ! ‘ ( 𝑁 − 1 ) ) ∈ ℤ ) |
| 30 |
|
nprmdvdsfacm1lem1 |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → 𝑁 ∥ ( 𝐴 · ( 2 · 𝐴 ) ) ) |
| 31 |
|
elfzo2 |
⊢ ( 𝐴 ∈ ( 2 ..^ 𝑁 ) ↔ ( 𝐴 ∈ ( ℤ≥ ‘ 2 ) ∧ 𝑁 ∈ ℤ ∧ 𝐴 < 𝑁 ) ) |
| 32 |
|
2eluzge1 |
⊢ 2 ∈ ( ℤ≥ ‘ 1 ) |
| 33 |
|
uzss |
⊢ ( 2 ∈ ( ℤ≥ ‘ 1 ) → ( ℤ≥ ‘ 2 ) ⊆ ( ℤ≥ ‘ 1 ) ) |
| 34 |
32 33
|
ax-mp |
⊢ ( ℤ≥ ‘ 2 ) ⊆ ( ℤ≥ ‘ 1 ) |
| 35 |
34
|
sseli |
⊢ ( 𝐴 ∈ ( ℤ≥ ‘ 2 ) → 𝐴 ∈ ( ℤ≥ ‘ 1 ) ) |
| 36 |
35
|
3ad2ant1 |
⊢ ( ( 𝐴 ∈ ( ℤ≥ ‘ 2 ) ∧ 𝑁 ∈ ℤ ∧ 𝐴 < 𝑁 ) → 𝐴 ∈ ( ℤ≥ ‘ 1 ) ) |
| 37 |
5
|
a1i |
⊢ ( 𝐴 ∈ ( ℤ≥ ‘ 2 ) → 2 ∈ ℤ ) |
| 38 |
|
eluzelz |
⊢ ( 𝐴 ∈ ( ℤ≥ ‘ 2 ) → 𝐴 ∈ ℤ ) |
| 39 |
37 38
|
zmulcld |
⊢ ( 𝐴 ∈ ( ℤ≥ ‘ 2 ) → ( 2 · 𝐴 ) ∈ ℤ ) |
| 40 |
39
|
3ad2ant1 |
⊢ ( ( 𝐴 ∈ ( ℤ≥ ‘ 2 ) ∧ 𝑁 ∈ ℤ ∧ 𝐴 < 𝑁 ) → ( 2 · 𝐴 ) ∈ ℤ ) |
| 41 |
|
1lt2 |
⊢ 1 < 2 |
| 42 |
|
eluz2 |
⊢ ( 𝐴 ∈ ( ℤ≥ ‘ 2 ) ↔ ( 2 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 2 ≤ 𝐴 ) ) |
| 43 |
|
zre |
⊢ ( 𝐴 ∈ ℤ → 𝐴 ∈ ℝ ) |
| 44 |
43
|
3ad2ant2 |
⊢ ( ( 2 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 2 ≤ 𝐴 ) → 𝐴 ∈ ℝ ) |
| 45 |
|
2re |
⊢ 2 ∈ ℝ |
| 46 |
45
|
a1i |
⊢ ( ( 2 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 2 ≤ 𝐴 ) → 2 ∈ ℝ ) |
| 47 |
|
2pos |
⊢ 0 < 2 |
| 48 |
|
0red |
⊢ ( 𝐴 ∈ ℤ → 0 ∈ ℝ ) |
| 49 |
45
|
a1i |
⊢ ( 𝐴 ∈ ℤ → 2 ∈ ℝ ) |
| 50 |
48 49 43
|
3jca |
⊢ ( 𝐴 ∈ ℤ → ( 0 ∈ ℝ ∧ 2 ∈ ℝ ∧ 𝐴 ∈ ℝ ) ) |
| 51 |
|
ltletr |
⊢ ( ( 0 ∈ ℝ ∧ 2 ∈ ℝ ∧ 𝐴 ∈ ℝ ) → ( ( 0 < 2 ∧ 2 ≤ 𝐴 ) → 0 < 𝐴 ) ) |
| 52 |
50 51
|
syl |
⊢ ( 𝐴 ∈ ℤ → ( ( 0 < 2 ∧ 2 ≤ 𝐴 ) → 0 < 𝐴 ) ) |
| 53 |
47 52
|
mpani |
⊢ ( 𝐴 ∈ ℤ → ( 2 ≤ 𝐴 → 0 < 𝐴 ) ) |
| 54 |
53
|
imp |
⊢ ( ( 𝐴 ∈ ℤ ∧ 2 ≤ 𝐴 ) → 0 < 𝐴 ) |
| 55 |
54
|
3adant1 |
⊢ ( ( 2 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 2 ≤ 𝐴 ) → 0 < 𝐴 ) |
| 56 |
44 46 55
|
3jca |
⊢ ( ( 2 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 2 ≤ 𝐴 ) → ( 𝐴 ∈ ℝ ∧ 2 ∈ ℝ ∧ 0 < 𝐴 ) ) |
| 57 |
42 56
|
sylbi |
⊢ ( 𝐴 ∈ ( ℤ≥ ‘ 2 ) → ( 𝐴 ∈ ℝ ∧ 2 ∈ ℝ ∧ 0 < 𝐴 ) ) |
| 58 |
57
|
3ad2ant1 |
⊢ ( ( 𝐴 ∈ ( ℤ≥ ‘ 2 ) ∧ 𝑁 ∈ ℤ ∧ 𝐴 < 𝑁 ) → ( 𝐴 ∈ ℝ ∧ 2 ∈ ℝ ∧ 0 < 𝐴 ) ) |
| 59 |
|
ltmulgt12 |
⊢ ( ( 𝐴 ∈ ℝ ∧ 2 ∈ ℝ ∧ 0 < 𝐴 ) → ( 1 < 2 ↔ 𝐴 < ( 2 · 𝐴 ) ) ) |
| 60 |
58 59
|
syl |
⊢ ( ( 𝐴 ∈ ( ℤ≥ ‘ 2 ) ∧ 𝑁 ∈ ℤ ∧ 𝐴 < 𝑁 ) → ( 1 < 2 ↔ 𝐴 < ( 2 · 𝐴 ) ) ) |
| 61 |
41 60
|
mpbii |
⊢ ( ( 𝐴 ∈ ( ℤ≥ ‘ 2 ) ∧ 𝑁 ∈ ℤ ∧ 𝐴 < 𝑁 ) → 𝐴 < ( 2 · 𝐴 ) ) |
| 62 |
36 40 61
|
3jca |
⊢ ( ( 𝐴 ∈ ( ℤ≥ ‘ 2 ) ∧ 𝑁 ∈ ℤ ∧ 𝐴 < 𝑁 ) → ( 𝐴 ∈ ( ℤ≥ ‘ 1 ) ∧ ( 2 · 𝐴 ) ∈ ℤ ∧ 𝐴 < ( 2 · 𝐴 ) ) ) |
| 63 |
31 62
|
sylbi |
⊢ ( 𝐴 ∈ ( 2 ..^ 𝑁 ) → ( 𝐴 ∈ ( ℤ≥ ‘ 1 ) ∧ ( 2 · 𝐴 ) ∈ ℤ ∧ 𝐴 < ( 2 · 𝐴 ) ) ) |
| 64 |
|
elfzo2 |
⊢ ( 𝐴 ∈ ( 1 ..^ ( 2 · 𝐴 ) ) ↔ ( 𝐴 ∈ ( ℤ≥ ‘ 1 ) ∧ ( 2 · 𝐴 ) ∈ ℤ ∧ 𝐴 < ( 2 · 𝐴 ) ) ) |
| 65 |
63 64
|
sylibr |
⊢ ( 𝐴 ∈ ( 2 ..^ 𝑁 ) → 𝐴 ∈ ( 1 ..^ ( 2 · 𝐴 ) ) ) |
| 66 |
65
|
3ad2ant2 |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → 𝐴 ∈ ( 1 ..^ ( 2 · 𝐴 ) ) ) |
| 67 |
11
|
a1i |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → 1 ∈ ℤ ) |
| 68 |
5
|
a1i |
⊢ ( 𝐴 ∈ ( 2 ..^ 𝑁 ) → 2 ∈ ℤ ) |
| 69 |
68 3
|
zmulcld |
⊢ ( 𝐴 ∈ ( 2 ..^ 𝑁 ) → ( 2 · 𝐴 ) ∈ ℤ ) |
| 70 |
69
|
3ad2ant2 |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → ( 2 · 𝐴 ) ∈ ℤ ) |
| 71 |
47
|
a1i |
⊢ ( 𝐴 ∈ ℤ → 0 < 2 ) |
| 72 |
|
lemul2 |
⊢ ( ( 2 ∈ ℝ ∧ 𝐴 ∈ ℝ ∧ ( 2 ∈ ℝ ∧ 0 < 2 ) ) → ( 2 ≤ 𝐴 ↔ ( 2 · 2 ) ≤ ( 2 · 𝐴 ) ) ) |
| 73 |
49 43 49 71 72
|
syl112anc |
⊢ ( 𝐴 ∈ ℤ → ( 2 ≤ 𝐴 ↔ ( 2 · 2 ) ≤ ( 2 · 𝐴 ) ) ) |
| 74 |
|
1red |
⊢ ( ( 𝐴 ∈ ℤ ∧ ( 2 · 2 ) ≤ ( 2 · 𝐴 ) ) → 1 ∈ ℝ ) |
| 75 |
|
2t2e4 |
⊢ ( 2 · 2 ) = 4 |
| 76 |
|
4re |
⊢ 4 ∈ ℝ |
| 77 |
75 76
|
eqeltri |
⊢ ( 2 · 2 ) ∈ ℝ |
| 78 |
77
|
a1i |
⊢ ( ( 𝐴 ∈ ℤ ∧ ( 2 · 2 ) ≤ ( 2 · 𝐴 ) ) → ( 2 · 2 ) ∈ ℝ ) |
| 79 |
7
|
zred |
⊢ ( 𝐴 ∈ ℤ → ( 2 · 𝐴 ) ∈ ℝ ) |
| 80 |
79
|
adantr |
⊢ ( ( 𝐴 ∈ ℤ ∧ ( 2 · 2 ) ≤ ( 2 · 𝐴 ) ) → ( 2 · 𝐴 ) ∈ ℝ ) |
| 81 |
|
1lt4 |
⊢ 1 < 4 |
| 82 |
14 76 81
|
ltleii |
⊢ 1 ≤ 4 |
| 83 |
82 75
|
breqtrri |
⊢ 1 ≤ ( 2 · 2 ) |
| 84 |
83
|
a1i |
⊢ ( ( 𝐴 ∈ ℤ ∧ ( 2 · 2 ) ≤ ( 2 · 𝐴 ) ) → 1 ≤ ( 2 · 2 ) ) |
| 85 |
|
simpr |
⊢ ( ( 𝐴 ∈ ℤ ∧ ( 2 · 2 ) ≤ ( 2 · 𝐴 ) ) → ( 2 · 2 ) ≤ ( 2 · 𝐴 ) ) |
| 86 |
74 78 80 84 85
|
letrd |
⊢ ( ( 𝐴 ∈ ℤ ∧ ( 2 · 2 ) ≤ ( 2 · 𝐴 ) ) → 1 ≤ ( 2 · 𝐴 ) ) |
| 87 |
73 86
|
sylbida |
⊢ ( ( 𝐴 ∈ ℤ ∧ 2 ≤ 𝐴 ) → 1 ≤ ( 2 · 𝐴 ) ) |
| 88 |
87
|
3adant1 |
⊢ ( ( 2 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 2 ≤ 𝐴 ) → 1 ≤ ( 2 · 𝐴 ) ) |
| 89 |
42 88
|
sylbi |
⊢ ( 𝐴 ∈ ( ℤ≥ ‘ 2 ) → 1 ≤ ( 2 · 𝐴 ) ) |
| 90 |
89
|
3ad2ant1 |
⊢ ( ( 𝐴 ∈ ( ℤ≥ ‘ 2 ) ∧ 𝑁 ∈ ℤ ∧ 𝐴 < 𝑁 ) → 1 ≤ ( 2 · 𝐴 ) ) |
| 91 |
31 90
|
sylbi |
⊢ ( 𝐴 ∈ ( 2 ..^ 𝑁 ) → 1 ≤ ( 2 · 𝐴 ) ) |
| 92 |
91
|
3ad2ant2 |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → 1 ≤ ( 2 · 𝐴 ) ) |
| 93 |
|
eluz2 |
⊢ ( ( 2 · 𝐴 ) ∈ ( ℤ≥ ‘ 1 ) ↔ ( 1 ∈ ℤ ∧ ( 2 · 𝐴 ) ∈ ℤ ∧ 1 ≤ ( 2 · 𝐴 ) ) ) |
| 94 |
67 70 92 93
|
syl3anbrc |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → ( 2 · 𝐴 ) ∈ ( ℤ≥ ‘ 1 ) ) |
| 95 |
|
zsqcl |
⊢ ( 𝐴 ∈ ℤ → ( 𝐴 ↑ 2 ) ∈ ℤ ) |
| 96 |
3 95
|
syl |
⊢ ( 𝐴 ∈ ( 2 ..^ 𝑁 ) → ( 𝐴 ↑ 2 ) ∈ ℤ ) |
| 97 |
96
|
3ad2ant2 |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → ( 𝐴 ↑ 2 ) ∈ ℤ ) |
| 98 |
|
3z |
⊢ 3 ∈ ℤ |
| 99 |
98
|
a1i |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → 3 ∈ ℤ ) |
| 100 |
3
|
3ad2ant2 |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → 𝐴 ∈ ℤ ) |
| 101 |
|
nprmdvdsfacm1lem2 |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → 3 ≤ 𝐴 ) |
| 102 |
|
eluz2 |
⊢ ( 𝐴 ∈ ( ℤ≥ ‘ 3 ) ↔ ( 3 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 3 ≤ 𝐴 ) ) |
| 103 |
99 100 101 102
|
syl3anbrc |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → 𝐴 ∈ ( ℤ≥ ‘ 3 ) ) |
| 104 |
|
2timesltsq |
⊢ ( 𝐴 ∈ ( ℤ≥ ‘ 3 ) → ( 2 · 𝐴 ) < ( 𝐴 ↑ 2 ) ) |
| 105 |
103 104
|
syl |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → ( 2 · 𝐴 ) < ( 𝐴 ↑ 2 ) ) |
| 106 |
94 97 105
|
elfzod |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → ( 2 · 𝐴 ) ∈ ( 1 ..^ ( 𝐴 ↑ 2 ) ) ) |
| 107 |
|
oveq2 |
⊢ ( 𝑁 = ( 𝐴 ↑ 2 ) → ( 1 ..^ 𝑁 ) = ( 1 ..^ ( 𝐴 ↑ 2 ) ) ) |
| 108 |
107
|
eleq2d |
⊢ ( 𝑁 = ( 𝐴 ↑ 2 ) → ( ( 2 · 𝐴 ) ∈ ( 1 ..^ 𝑁 ) ↔ ( 2 · 𝐴 ) ∈ ( 1 ..^ ( 𝐴 ↑ 2 ) ) ) ) |
| 109 |
108
|
3ad2ant3 |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → ( ( 2 · 𝐴 ) ∈ ( 1 ..^ 𝑁 ) ↔ ( 2 · 𝐴 ) ∈ ( 1 ..^ ( 𝐴 ↑ 2 ) ) ) ) |
| 110 |
106 109
|
mpbird |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → ( 2 · 𝐴 ) ∈ ( 1 ..^ 𝑁 ) ) |
| 111 |
|
muldvdsfacm1 |
⊢ ( ( 𝐴 ∈ ( 1 ..^ ( 2 · 𝐴 ) ) ∧ ( 2 · 𝐴 ) ∈ ( 1 ..^ 𝑁 ) ) → ( 𝐴 · ( 2 · 𝐴 ) ) ∥ ( ! ‘ ( 𝑁 − 1 ) ) ) |
| 112 |
66 110 111
|
syl2anc |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → ( 𝐴 · ( 2 · 𝐴 ) ) ∥ ( ! ‘ ( 𝑁 − 1 ) ) ) |
| 113 |
2 10 29 30 112
|
dvdstrd |
⊢ ( ( 𝑁 ∈ ( ℤ≥ ‘ 6 ) ∧ 𝐴 ∈ ( 2 ..^ 𝑁 ) ∧ 𝑁 = ( 𝐴 ↑ 2 ) ) → 𝑁 ∥ ( ! ‘ ( 𝑁 − 1 ) ) ) |