After various remodellings, and amid much perturbation, secession, violent reproach, the Household Suffrage Bill passed in August 1867.

We now use matrix perturbation theory to compute the covariance of based on this zero approximation.

"He carrieth himself," writes Salisbury to Sir Charles Cornwallis, ambassador at Madrid, "without any feare or perturbation ...; under all this action he is noe more dismayed, nay scarce any more troubled than if he was taken for a poor robbery upon the highway," declaring "that he is ready to die, and rather wisheth 10,000 deaths, than willingly to accuse his master or any other."

ant colony is able to adjust its task allocation to external perturbation.

For this to be achieved a rigourous one-loop calculation based on a self-consistent perturbation expansion is needed.