Description: The difference of two infinite series. (Contributed by NM, 17-Mar-2005) (Revised by Mario Carneiro, 27-May-2014)
Ref | Expression | ||
---|---|---|---|
Hypotheses | sersub.1 | |
|
sersub.2 | |
||
sersub.3 | |
||
sersub.4 | |
||
Assertion | sersub | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sersub.1 | |
|
2 | sersub.2 | |
|
3 | sersub.3 | |
|
4 | sersub.4 | |
|
5 | addcl | |
|
6 | 5 | adantl | |
7 | subcl | |
|
8 | 7 | adantl | |
9 | addsub4 | |
|
10 | 9 | eqcomd | |
11 | 10 | adantl | |
12 | 6 8 11 1 2 3 4 | seqcaopr2 | |