It’s surprisingly difficult to prove one of the most basic properties of a number: whether it can be written as a fraction. A ...

In 2013, Cobham and Sumner proposed an alternative to the Gini co-efficient: the Palma ratio. They named it after José Gabriel Palma, a Chilean economist. Palma noticed that in most countries, the ...

A comprehensive and coherent set of mathematics standards for each and every student from prekindergarten through grade 12, Principles and Standards is the first set of rigorous, college and career ...