Description: Extended real version of ltadd1 . (Contributed by Mario Carneiro, 23-Aug-2015)
Ref | Expression | ||
---|---|---|---|
Assertion | xltadd1 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | xleadd1 | |
|
2 | 1 | 3com12 | |
3 | 2 | notbid | |
4 | xrltnle | |
|
5 | 4 | 3adant3 | |
6 | simp1 | |
|
7 | rexr | |
|
8 | 7 | 3ad2ant3 | |
9 | xaddcl | |
|
10 | 6 8 9 | syl2anc | |
11 | simp2 | |
|
12 | xaddcl | |
|
13 | 11 8 12 | syl2anc | |
14 | xrltnle | |
|
15 | 10 13 14 | syl2anc | |
16 | 3 5 15 | 3bitr4d | |