Description: Absorption law for restriction. (Contributed by Glauco Siliprandi, 23-Oct-2021)
Ref | Expression | ||
---|---|---|---|
Hypothesis | resabs2d.1 | |
|
Assertion | resabs2d | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | resabs2d.1 | |
|
2 | resabs2 | |
|
3 | 1 2 | syl | |