death_date birth_place fields birth_date residence article_title name
31 may 1931 amiens , france mathematics 4 march 1866 france eugène cosserat
 eugène-maurice-pierre cosserat
eugène cosserat

eugène-maurice-pierre cosserat -lrb- 4 march 1866 -- 31 may 1931 -rrb- was a french mathematician and astronomer .
born in amiens , he studied at the École normale supérieure from 1883 to 1888 .
he was on science faculty of toulouse university from 1889 and director of its observatory from 1908 , a position he held for the rest of his life .
he was elected to the académie des sciences in 1919 .
his studies included the rings and satellites of saturn , comets and double stars , but is best remembered for work with his engineer brother françois on surface mechanics , particularly problems of elasticity .
their work on elasticity described an extension of the classical theory to include a description of micro-rotation of material points in addition to the classical description of deformation .
their work lacked key elements and lay dormant until the 1960s at which time it was reopened by several authors .
it has become known as the theory of micropolar elasticity and has remained an active research area ever since .
