Step |
Hyp |
Ref |
Expression |
1 |
|
readdid1addid2d.a |
|
2 |
|
readdid1addid2d.b |
|
3 |
|
readdid1addid2d.1 |
|
4 |
2
|
adantr |
|
5 |
4
|
recnd |
|
6 |
1
|
adantr |
|
7 |
6
|
recnd |
|
8 |
|
simpr |
|
9 |
8
|
recnd |
|
10 |
5 7 9
|
addassd |
|
11 |
3
|
adantr |
|
12 |
11
|
oveq1d |
|
13 |
10 12
|
eqtr3d |
|
14 |
6 8
|
readdcld |
|
15 |
|
readdcan |
|
16 |
14 8 4 15
|
syl3anc |
|
17 |
13 16
|
mpbid |
|