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.

${\mathrm{colog}}_{b}x={\log }_b\left(\frac{1}{x}\right)={\log }_{b}1-{\log }_{b}x=-{\log }_{b}x={\log }_{1/b}x.$

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⁺].

References

• Meriam Webster definition of cologarithm
• "Cologarithm." From MathWorld--A Wolfram Web Resource.