Step |
Hyp |
Ref |
Expression |
1 |
|
elfzole1 |
|
2 |
|
elfzoelz |
|
3 |
2
|
zred |
|
4 |
3
|
adantr |
|
5 |
|
nn0addge1 |
|
6 |
4 5
|
sylan |
|
7 |
|
elfzoel1 |
|
8 |
7
|
zred |
|
9 |
8
|
adantr |
|
10 |
3
|
adantr |
|
11 |
|
nn0re |
|
12 |
11
|
adantl |
|
13 |
10 12
|
readdcld |
|
14 |
|
letr |
|
15 |
9 10 13 14
|
syl3anc |
|
16 |
15
|
exp4b |
|
17 |
16
|
com23 |
|
18 |
17
|
imp31 |
|
19 |
6 18
|
mpd |
|
20 |
19
|
exp31 |
|
21 |
1 20
|
mpd |
|
22 |
21
|
imp |
|
23 |
|
elfzoel2 |
|
24 |
23
|
zred |
|
25 |
24
|
adantr |
|
26 |
|
elfzolt2 |
|
27 |
26
|
adantr |
|
28 |
10 25 12 27
|
ltadd1dd |
|
29 |
2
|
adantr |
|
30 |
|
nn0z |
|
31 |
30
|
adantl |
|
32 |
29 31
|
zaddcld |
|
33 |
7
|
adantr |
|
34 |
23
|
adantr |
|
35 |
34 31
|
zaddcld |
|
36 |
|
elfzo |
|
37 |
32 33 35 36
|
syl3anc |
|
38 |
22 28 37
|
mpbir2and |
|