Sometimes a shape is transformed using more than one step, for example a reflection followed by a rotation. The combination of transformations can usually be described as a single transformation.

What’s math got to do with it? Everything, says Dan Meyer, creator of the the popular blog dy/dan. Meyer is one of America’s most popular math educators—he has 43,400 followers on Twitter who are ...

I work in differential geometry and the application of geometry to the study of partial differential equations. Specifically, my work has focused on conservation laws, Backlund transformations, ...