Description: Absorption law for restriction, deduction form. (Contributed by Glauco Siliprandi, 11-Dec-2019)
Ref | Expression | ||
---|---|---|---|
Hypothesis | resabs1d.b | |
|
Assertion | resabs1d | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | resabs1d.b | |
|
2 | resabs1 | |
|
3 | 1 2 | syl | |