Plus42 Equations, Preview Release

[Thomas Okken]

The integrator doesn't solve the equation, it just evaluates it, and evaluating an equation with a top-level = sign means evaluating its left- and right-hand sides and subtracting the latter from the former. So if you're integrating Y=X^2 with integration variable Y, you're integrating Y-X^2, where X will be whatever value it happens to be when you start the integration.