Description: Class intersection in terms of indexed intersection. Definition in Stoll p. 44. (Contributed by NM, 28-Jun-1998)
Ref | Expression | ||
---|---|---|---|
Assertion | intiin | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfint2 | |
|
2 | df-iin | |
|
3 | 1 2 | eqtr4i | |