Description: A nonnegative integer is a real number. (Contributed by NM, 9-May-2004)
Ref | Expression | ||
---|---|---|---|
Assertion | nn0re | $${\u22a2}{A}\in {\mathbb{N}}_{0}\to {A}\in \mathbb{R}$$ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nn0ssre | $${\u22a2}{\mathbb{N}}_{0}\subseteq \mathbb{R}$$ | |
2 | 1 | sseli | $${\u22a2}{A}\in {\mathbb{N}}_{0}\to {A}\in \mathbb{R}$$ |