Viewed this way, a definition is a decision mechanism. It distinguishes some elements of the universe from the others. Hence ...

Pure mathematics uses mathematics to explore abstract ideas, mathematics that does not necessarily describe a real physical system. This can include developing the fundamental tools used by ...

Troy Segal is an editor and writer. She has 20+ years of experience covering personal finance, wealth management, and business news. Michael Boyle is an experienced financial professional with more ...