For 10 points, name this mathematician whose namesake canonical form consists of eigenvalues on the diagonal and ones below the diagonal in each of the namesake boxes.
A bounded set is said to be this type of measurable if it is well approximated by simple sets. One of this man's namesake theorems claims that any closed curve in R-2 divides the plane into a bounded interior and unbounded exterior, which are complements. Another theorem bearing his name states that all composition series of a group have the same length. His namesake canonical basis consists of cyclic subsets, and he also names a form in which the diagonal of the matrix of the operator is zero if and only if the operator is nilpotent. For 10 points, name this mathematician whose namesake canonical form consists of eigenvalues on the diagonal and ones below the diagonal in each of the namesake boxes.
A bounded set is said to be this type of measurable if it is well approximated by simple sets.
Camille Jordan