Step |
Hyp |
Ref |
Expression |
1 |
|
elfzelz |
|
2 |
|
elfzelz |
|
3 |
|
zltlem1 |
|
4 |
1 2 3
|
syl2anr |
|
5 |
|
elfzuz |
|
6 |
|
peano2zm |
|
7 |
2 6
|
syl |
|
8 |
|
elfz5 |
|
9 |
5 7 8
|
syl2anr |
|
10 |
4 9
|
bitr4d |
|
11 |
10
|
pm5.32da |
|
12 |
|
vex |
|
13 |
12
|
elpred |
|
14 |
|
elfzuz3 |
|
15 |
2
|
zcnd |
|
16 |
|
ax-1cn |
|
17 |
|
npcan |
|
18 |
15 16 17
|
sylancl |
|
19 |
18
|
fveq2d |
|
20 |
14 19
|
eleqtrrd |
|
21 |
|
peano2uzr |
|
22 |
7 20 21
|
syl2anc |
|
23 |
|
fzss2 |
|
24 |
22 23
|
syl |
|
25 |
24
|
sseld |
|
26 |
25
|
pm4.71rd |
|
27 |
11 13 26
|
3bitr4d |
|
28 |
27
|
eqrdv |
|