In addition, he is a set of equations along with Born, Green, Kirkwood, and Yvon, which describe the correlation funcitons of a many body system and which generalize to the Liouville equation for a system of finite number of particles.
One of this man's theorems, which is used to create analytic continuations of Wrightman's functions, states that if a function is holomorphic in two contiguous wedges, its holomorphic throughout. In addition to that Edge-of-the-Wedge theorem, he is also the namesake of an inner product which is sometimes called the Kubo-Mori inner product. He is also the namesake of a canonical transformation that enables the diagonalization of quadratic Hamiltonians and was used by this man to come to an independent conclusion of the BCS theory. In addition, he is a set of equations along with Born, Green, Kirkwood, and Yvon, which describe the correlation funcitons of a many body system and which generalize to the Liouville equation for a system of finite number of particles. For 10 points, identify this Russian scientist, who lends his name to an ?inequality used to establish an upper bound on the Helmholtz Free energy of liquid metals along with Gibbs. 
One of this man's theorems, which is used to create analytic continuations of Wrightman's functions, states that if a function is holomorphic in two contiguous wedges, its holomorphic throughout.
{Nikolai Bogoliubov} [accept any {close sounding pronunciation}]