Strict inequality

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A strict inequality is an inequality where the inequality symbol is either $>$ (greater than) or $<$ (less than). That is, a strict inequality is an inequality which has no equality conditions.

An example of a well-known strict inequality is the Triangle Inequality, which states that, in a nondegenerate triangle $ABC$ , the following relation holds:

$AB+BC>AC$

A non-example is the Trivial Inequality which states that if $x$ is a real number then $x^2 \geq 0$ . This inequality is not strict because it has an equality case: when $x = 0$ , $x^2 = 0$ .

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Strict inequality