👉 The concept of isoperimetric inequality, also known as the isoperimetric problem or the isoperimetric equation, was introduced by mathematician Henri Poincaré in his 1892 paper "Sur les équations linéaires et les problèmes de géométrie." The term comes from the Greek word "isos" meaning "equal", and "perimètre" which means "circumference". It is a mathematical inequality that states that for
