Several real-world applications introduce derivativefree optimization problems, called variable dimension problems, where the problem's dimension is not known in advance. Despite their importance, no ...

Explore news and insights on climate change, environment policies, global warming and sustainable practices with The New York Times Climate and Environment section.

Interest on variable interest rate loans move with market rates; interest on fixed rate loans will remain the same for that loan's entire term.

Per capita is a Latin term that translates to “by head.” It’s used to refer to an average number per person.