Description: Membership in a projective subspace sum of two points. (Contributed by NM, 8-Mar-2012)
Ref | Expression | ||
---|---|---|---|
Hypotheses | paddfval.l | |
|
paddfval.j | |
||
paddfval.a | |
||
paddfval.p | |
||
Assertion | elpadd2at2 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | paddfval.l | |
|
2 | paddfval.j | |
|
3 | paddfval.a | |
|
4 | paddfval.p | |
|
5 | 1 2 3 4 | elpadd2at | |
6 | 5 | 3adant3r3 | |
7 | simpr3 | |
|
8 | 7 | biantrurd | |
9 | 6 8 | bitr4d | |