Published online by Cambridge University Press: 15 September 2014
The differential equation of the conduction of heat in ordinary three-dimensional space is generally written in the form
where v denotes the temperature of the medium at time t. For a medium in which the temperature varies only in one direction, e.g. an infinite cylinder with the temperature varying along the axis, the equation is
page 231 note * Forsyth, Theory of Differential Equations, part iv, vol. vi, pp, 107–109.
page 231 note † Fourier, Théorie Analytique de la Chaleur.
page 234 note * Poincaré, Théorie Analytique de la Chaleur, chap. vii.