Since mathematicians became a thing in Babylonia somewhere around 2000 BC, number crunchers have been mystified by ocean waves. About 300 years ago, the Leonhard Euler fluid-dynamics equations ...

Perhaps the oldest and most prominent of these equations, formulated by Leonhard Euler more than 250 years ago, describe the flow of an ideal, incompressible fluid: a fluid with no viscosity, or ...

In 1779, the Swiss mathematician Leonhard Euler posed a puzzle that has since become famous: Six army regiments each have six officers of six different ranks. Can the 36 officers be arranged in a 6-by ...