simultaneous linear differential equations

These may be solved by differentiating one or other of the equations and substituting an expression for dx/dt or dy/dt into the other equation to form a second order differential equation in x or y. Such systems of differential equations are of importance in the linear theory of equilibria.

Alternatively, the equations can be rewritten as a single matrix equation

This then has the solution

(See exponential of a matrix.)

• hyperbolic plane
• hyperbolic spiral
• hyperboloid of one sheet
• hyperboloid of two sheets
• hypercube
• hypergeometric distribution
• hypergeometric series
• hyperplane
• hyperreals
• hypocycloid
• hypotenuse
• hypothesis testing
• Hölder's inequality
• I
• I
• i
• i
• ICM
• icosahedron
• icosidodecahedron
• ideal
• ideal element
• ideal point
• idempotent
• identically distributed