Description: Generalize cxpmul2 to negative integers. (Contributed by Mario Carneiro, 30-May-2016)
Ref | Expression | ||
---|---|---|---|
Hypotheses | cxp0d.1 | |
|
cxpefd.2 | |
||
cxpefd.3 | |
||
cxpmul2zd.4 | |
||
Assertion | cxpmul2zd | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cxp0d.1 | |
|
2 | cxpefd.2 | |
|
3 | cxpefd.3 | |
|
4 | cxpmul2zd.4 | |
|
5 | cxpmul2z | |
|
6 | 1 2 3 4 5 | syl22anc | |