Metamath Proof Explorer

Theorem nn0ssge0

Description: Nonnegative integers are nonnegative reals. (Contributed by Glauco Siliprandi, 11-Oct-2020)

Ref Expression
Assertion nn0ssge0 
|- NN0 C_ ( 0 [,) +oo )

Proof

Step Hyp Ref Expression
1 nn0rp0 
 |-  ( n e. NN0 -> n e. ( 0 [,) +oo ) )
2 1 ssriv 
 |-  NN0 C_ ( 0 [,) +oo )