Семинарът  Problems and Methods Related to Coding Theory, организиран от ИМИ - БАН, Секция “Математически основи на информатиката”,  Novosibirsk State University, Novosibirsk, Russia, и  Sobolev Institute of Mathematics, Siberian Branch of  the Russian Academy of Sciences, Novosibirsk, Russia Ви кани на поредната си сбирка, на която Assist. Prof. Ivan Mogilnykh, Novosibirsk State University, ще изнесе доклад на тема: Completely regular codes in Johnson and Grassmann graphs Abstract. Completely regular codes in Johnson and Grassmann graph are interrelated with t-designs. In this talk we give an introduction to these codes and discuss several old and recent results. Martin noted that any (k-1)-(n,k,1)-design D is a completely regular code in the Johnson graph J(n,k). Avgustinovich and Mogilnykh showed that {B:|B|=k+1, B does not contain any blocks of D} [...]

Секция „МАТЕМАТИЧЕСКИ ОСНОВИ НА ИНФОРМАТИКАТА“ организира семинар по проект „Стратегии за подобряване на качеството на моделите, намерени от алгоритми за машинно обучение с приложение към квантовата томография“. Доклад ще изнесат: Виолета Иванова-Ролинг и Никлас Ролинг на тема: Quantum state tomography as a numerical optimization problem Абстракт: We present a framework that formulates the quest for the most efficient quantum state tomography scheme as an optimization problem which can be solved numerically. This approach can be applied to a broad spectrum of relevant setups including measurements restricted to a subsystem. To illustrate the power of this method we present results for the six-dimensional Hilbert space constituted by a qubit-qutrit system, which could be realized e.g. by the N-14 nuclear spin-1 and two electronic spin states [...]