Description: The law of concretion for operation class abstraction. (Contributed by Peter Mazsa, 24-Oct-2022)
Ref | Expression | ||
---|---|---|---|
Hypotheses | brrabga.1 | ||
brrabga.2 | |||
Assertion | brrabga |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | brrabga.1 | ||
2 | brrabga.2 | ||
3 | df-br | ||
4 | 2 | eleq2i | |
5 | 3 4 | bitri | |
6 | 1 | eloprabga | |
7 | 5 6 | syl5bb |