sum of squares: 32 + 52 = 9 + 25 = 34

square of sum (3 + 5)2 = 82 = 64

This is a version of the Cauchy-Schwarz inequality.

The Cauchy-Schwartz inequality is a mathematical inequality. It states that for all vectors x and y of an inner product space, the dot product of x and y squares is less than or equal to the dot product of x to itself multiplied by y to itself.

M. Chacron has written:

'Non isotropic unitary spaces and modules with Cauchy-Schwarz inequalities' -- subject- s -: Inequalities - Mathematics -, Representations of groups, Unitary groups

Estrée-Cauchy's population is 321.

The population of Sauchy-Cauchy is 407.