Description: Hom is unaffected by restriction. (Contributed by Mario Carneiro, 5-Jan-2017)
Ref | Expression | ||
---|---|---|---|
Hypotheses | resshom.1 | ||
resshom.2 | |||
Assertion | resshom |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | resshom.1 | ||
2 | resshom.2 | ||
3 | df-hom | ||
4 | 1nn0 | ||
5 | 4nn | ||
6 | 4 5 | decnncl | |
7 | 1nn | ||
8 | 4nn0 | ||
9 | 1lt10 | ||
10 | 7 8 4 9 | declti | |
11 | 1 2 3 6 10 | resslem |