claim: The Times switched to a compact format in 2014.
evidence: In mathematics , Maclaurin 's inequality , named after Colin Maclaurin , is a refinement of the inequality of arithmetic and geometric means .. mathematics. mathematics. Colin Maclaurin. Colin Maclaurin. inequality of arithmetic and geometric means. inequality of arithmetic and geometric means. Let a1 , a2 , ... , an be positive real numbers , and for k = 1 , 2 , ... , n define the averages Sk as follows  :. positive. positive number. The numerator of this fraction is the elementary symmetric polynomial of degree k in the n variables a1 , a2 , ... , an , that is , the sum of all products of k of the numbers a1 , a2 , ... , an with the indices in increasing order .. elementary symmetric polynomial. elementary symmetric polynomial. The denominator is the number of terms in the numerator , the binomial coefficient. binomial coefficient. binomial coefficient. Maclaurin 's inequality is the following chain of inequalities  :. inequalities. inequality ( mathematics ). with equality if and only if all the ai are equal .. For n = 2 , this gives the usual inequality of arithmetic and geometric means of two numbers .. inequality of arithmetic and geometric means. inequality of arithmetic and geometric means. Maclaurin 's inequality is well illustrated by the case n = 4  :. Maclaurin 's inequality can be proved using the Newton 's inequalities .. inequalities. inequality ( mathematics )