Step |
Hyp |
Ref |
Expression |
1 |
|
jm3.1.a |
|- ( ph -> A e. ( ZZ>= ` 2 ) ) |
2 |
|
jm3.1.b |
|- ( ph -> K e. ( ZZ>= ` 2 ) ) |
3 |
|
jm3.1.c |
|- ( ph -> N e. NN ) |
4 |
|
jm3.1.d |
|- ( ph -> ( K rmY ( N + 1 ) ) <_ A ) |
5 |
|
2z |
|- 2 e. ZZ |
6 |
|
eluzelz |
|- ( A e. ( ZZ>= ` 2 ) -> A e. ZZ ) |
7 |
1 6
|
syl |
|- ( ph -> A e. ZZ ) |
8 |
|
zmulcl |
|- ( ( 2 e. ZZ /\ A e. ZZ ) -> ( 2 x. A ) e. ZZ ) |
9 |
5 7 8
|
sylancr |
|- ( ph -> ( 2 x. A ) e. ZZ ) |
10 |
|
eluz2nn |
|- ( K e. ( ZZ>= ` 2 ) -> K e. NN ) |
11 |
2 10
|
syl |
|- ( ph -> K e. NN ) |
12 |
11
|
nnzd |
|- ( ph -> K e. ZZ ) |
13 |
9 12
|
zmulcld |
|- ( ph -> ( ( 2 x. A ) x. K ) e. ZZ ) |
14 |
|
zsqcl |
|- ( K e. ZZ -> ( K ^ 2 ) e. ZZ ) |
15 |
12 14
|
syl |
|- ( ph -> ( K ^ 2 ) e. ZZ ) |
16 |
13 15
|
zsubcld |
|- ( ph -> ( ( ( 2 x. A ) x. K ) - ( K ^ 2 ) ) e. ZZ ) |
17 |
|
peano2zm |
|- ( ( ( ( 2 x. A ) x. K ) - ( K ^ 2 ) ) e. ZZ -> ( ( ( ( 2 x. A ) x. K ) - ( K ^ 2 ) ) - 1 ) e. ZZ ) |
18 |
16 17
|
syl |
|- ( ph -> ( ( ( ( 2 x. A ) x. K ) - ( K ^ 2 ) ) - 1 ) e. ZZ ) |
19 |
|
0red |
|- ( ph -> 0 e. RR ) |
20 |
3
|
nnnn0d |
|- ( ph -> N e. NN0 ) |
21 |
11 20
|
nnexpcld |
|- ( ph -> ( K ^ N ) e. NN ) |
22 |
21
|
nnred |
|- ( ph -> ( K ^ N ) e. RR ) |
23 |
18
|
zred |
|- ( ph -> ( ( ( ( 2 x. A ) x. K ) - ( K ^ 2 ) ) - 1 ) e. RR ) |
24 |
21
|
nngt0d |
|- ( ph -> 0 < ( K ^ N ) ) |
25 |
1 2 3 4
|
jm3.1lem2 |
|- ( ph -> ( K ^ N ) < ( ( ( ( 2 x. A ) x. K ) - ( K ^ 2 ) ) - 1 ) ) |
26 |
19 22 23 24 25
|
lttrd |
|- ( ph -> 0 < ( ( ( ( 2 x. A ) x. K ) - ( K ^ 2 ) ) - 1 ) ) |
27 |
|
elnnz |
|- ( ( ( ( ( 2 x. A ) x. K ) - ( K ^ 2 ) ) - 1 ) e. NN <-> ( ( ( ( ( 2 x. A ) x. K ) - ( K ^ 2 ) ) - 1 ) e. ZZ /\ 0 < ( ( ( ( 2 x. A ) x. K ) - ( K ^ 2 ) ) - 1 ) ) ) |
28 |
18 26 27
|
sylanbrc |
|- ( ph -> ( ( ( ( 2 x. A ) x. K ) - ( K ^ 2 ) ) - 1 ) e. NN ) |