the commutant lifting theorem, due to Sz.-Nagy and Foias, is a powerful theorem used to prove several interpolation results. The commutant lifting theorem...

Together with Béla Szőkefalvi-Nagy, Foias proved the celebrated commutant lifting theorem. The Foias constant is named after him. Foias is listed as an...

N-1} derivatives at the origin are given), but it led to the Commutant Lifting theorem of Sz.-Nagy and Foiaş which inaugurated an operator theoretic...

"lifting" of objects associated to T to the level of V, where the lifted objects may have nicer properties. See, for example, the commutant lifting theorem...

algebra V of central charge c and a set S of vectors, one may define the commutant C(V,S) to be the subspace of vectors v strictly commute with all fields...