Description: Distribute proper substitution through the range of a class. (Contributed by Alan Sare, 10-Nov-2012)
Ref | Expression | ||
---|---|---|---|
Assertion | csbrn | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | csbima12 | |
|
2 | csbconstg | |
|
3 | 2 | imaeq2d | |
4 | 0ima | |
|
5 | 4 | eqcomi | |
6 | csbprc | |
|
7 | 6 | imaeq1d | |
8 | 0ima | |
|
9 | 7 8 | eqtrdi | |
10 | 6 | imaeq1d | |
11 | 5 9 10 | 3eqtr4a | |
12 | 3 11 | pm2.61i | |
13 | 1 12 | eqtri | |
14 | dfrn4 | |
|
15 | 14 | csbeq2i | |
16 | dfrn4 | |
|
17 | 13 15 16 | 3eqtr4i | |