Description: Membership in a two-sided ideal. Formerly part of proof for 2idlcpbl . (Contributed by Mario Carneiro, 14-Jun-2015) (Revised by AV, 20-Feb-2025)
Ref | Expression | ||
---|---|---|---|
Hypotheses | 2idlel.i | ||
2idlel.o | |||
2idlel.j | |||
2idlel.t | |||
Assertion | 2idlelb |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2idlel.i | ||
2 | 2idlel.o | ||
3 | 2idlel.j | ||
4 | 2idlel.t | ||
5 | 1 2 3 4 | 2idlval | |
6 | 5 | elin2 |