Punctuation after a set-off equation is helpful and often clarifies the meaning. Display equations are often preceded by punctuation.
In the linear quadratic equation model, the survival probability for cells receiving a j increment of radiation, Dj, is as follows:where α and β are the parameters of the linear quadratic equation model.
S = exp(− αDj − βDj),
Do not use periods after a set-off equation if the equation is preceded by a period.