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Defining class for the purpose of legislation is a non-starter, writes Michael Chapman. Plus a letter from Patrick Yarker Further to your editorial on class becoming a legally protected characteristic ...

Five years ago, mathematicians Dawei Chen and Quentin Gendron were trying to untangle a difficult area of algebraic geometry involving differentials, elements of calculus used to measure distance ...

Abstract: Inverse optimal control (IOC) is a problem of estimating a cost function based on the behaviors of an expert that behaves optimally with respect to the cost function. Although the ...

When it comes to aviation mysteries, they don’t come much stranger than Flight 19. On December 5, 1945, a fleet of five U.S. Navy torpedo bomber planes carrying a total of 14 men took off from Fort ...

Challenge your mind with this optical illusion puzzle that tests your observation and problem-solving skills. The image contains overlapping triangles, requiring careful attention to detail to spot ...

Word problems try and tell students a story about the math problem in front of them. They are a useful way to connect abstract numbers to concrete situations, so students can learn early on to apply ...

Emily Sharp and Kunal Nabar collaborate on a puzzle that’s greater than the sum of its parts. By Caitlin Lovinger Jump to: Tricky Clues | Today’s Theme SUNDAY PUZZLE — Will Shortz, in his print ...

In our 36-country survey, we asked respondents how large a problem various types of inequality are in their nation, including the gap between the rich and the poor, unequal rights for men and women, ...

In 2022, the Council on Foreign Relations warned, “Income and wealth inequality in the United States is substantially higher than in almost any other developed nation, and it is on the rise, sparking ...

The level of economic inequality in the city of Santiago in Brazil is evident along the border of a high-density, low-income favela neighborhood next to high-rise ...