Assertion: new metric space | /r/HasProperty | \times
Facets:
Source sentences:
text: 1 , d 1 ) and (X 2 , d 2 ) are two metric spaces, then define the new metric space \((X_{1} \times X_{2},d)\) by letting $$\displaystyle{d((x_{1},x_{2}),(y_{1},y_{2}))