It is well known that the aberrations of optical systems due to such disturbances as chromatic variation may be treated by perturbation methods; it is also true that the calculation of geometrical ...

Entangled light proves quantum computers can do what classical methods can't - cut years of work into seconds, an enormous quantum advantage ...

Journal of Operator Theory, Vol. 65, No. 1 (Winter 2011), pp. 17-45 (29 pages) We introduce characteristic functions for certain contractive liftings of row contractions. These are multi-analytic ...