... forces-such as thermal gradients or electric fields- 'Such defects, if present, will be assumed to be in local thermal equilibrium at very small concen- trations. Kinetics of Materials. ... everywhere except where its argument is zero, where it has an infinite singularity. It has the property s j(F')6(F- Fo)dr'= f (r& apos;0); so it also follows that s6 (F- Fo)dr'= ... 2.2.2. EXERCISES 12 9 where q = @, Using standard tables of transforms to transform back to (2, t) coordinates, the final solutions are Because erf(z) = -erf(-z), the solutions are identical...