List of limits
In mathematics, the base-b cologarithm, sometimes shortened to colog, of a number is the base-b logarithm of the reciprocal of the number. It is equal to the negative base-b logarithm of the number.
In chemistry, a decimal cologarithm is indicated by the letter p (originally the Greek letter ρ)Template:Fact.
For example, pK = – log10 K and pH = – log10 [H3O+].