"Even the +, −, =, and x signs we take for granted only came into widespread use in the 17th century. Which means that the earlier algebraists we know of … all had expressed their equations mostly in ...

Banner image: Skin cells as seen under the microscope. (Credit: Eric Bunker/Liu Lab) When you cut yourself, a mass migration begins inside your body: Skin cells flood by the thousands toward the site ...

Geometric partial differential equations of level-set form are usually constructed by a variational method using either Dirac delta function or co-area formula in the energy functional to be minimized ...