Nikita Vvedenskaya: a Mathematician and a Person and Her Work on a Local Control of Queues

N.D. Vvedenskaya (1930 – 2022) was a Russian mathematician who worked on the theory of partial differential equations, numerical methods, information theory, queueing theory and theory of large deviations. In this paper I discuss some aspects of her most known work, a paper co-authored with Do-brushin and Karpelevich (1996), on an asymptotic analysis of a service system where a task is directed to a shorter queue between two randomly chosen queues. I also give a sketch of biographic details of her remarkable life, based on my own experience during the period of personal acquaintance and collaborative work which lasted for almost 50 years.