Step |
Hyp |
Ref |
Expression |
1 |
|
simpr3 |
|
2 |
|
simpr1 |
|
3 |
|
simpr2 |
|
4 |
2 3
|
xaddcld |
|
5 |
|
xmetcl |
|
6 |
5
|
adantr |
|
7 |
4 6
|
xrlenltd |
|
8 |
1 7
|
mpbid |
|
9 |
|
elin |
|
10 |
|
simpl1 |
|
11 |
|
simpl2 |
|
12 |
|
elbl |
|
13 |
10 11 2 12
|
syl3anc |
|
14 |
|
simpl3 |
|
15 |
|
elbl |
|
16 |
10 14 3 15
|
syl3anc |
|
17 |
13 16
|
anbi12d |
|
18 |
|
anandi |
|
19 |
17 18
|
bitr4di |
|
20 |
10
|
adantr |
|
21 |
11
|
adantr |
|
22 |
|
simpr |
|
23 |
|
xmetcl |
|
24 |
20 21 22 23
|
syl3anc |
|
25 |
14
|
adantr |
|
26 |
|
xmetcl |
|
27 |
20 25 22 26
|
syl3anc |
|
28 |
2
|
adantr |
|
29 |
3
|
adantr |
|
30 |
|
xlt2add |
|
31 |
24 27 28 29 30
|
syl22anc |
|
32 |
|
xmettri3 |
|
33 |
20 21 25 22 32
|
syl13anc |
|
34 |
6
|
adantr |
|
35 |
24 27
|
xaddcld |
|
36 |
4
|
adantr |
|
37 |
|
xrlelttr |
|
38 |
34 35 36 37
|
syl3anc |
|
39 |
33 38
|
mpand |
|
40 |
31 39
|
syld |
|
41 |
40
|
expimpd |
|
42 |
19 41
|
sylbid |
|
43 |
9 42
|
syl5bi |
|
44 |
8 43
|
mtod |
|
45 |
44
|
eq0rdv |
|