There are many complex combinatorial problems which involve searching for an undirected graph satisfying a certain property. These problems are often highly challenging because of the large number of isomorphic representations of a possible solution. In this paper we introduce novel, effective and compact, symmetry breaking constraints for undirected graph search. While incomplete, these prove ...

Can vectors with low Schmidt rank form mutually unbiased bases? high positive under partial transpose states? In this work, we address these questions by presenting several new results related to constraints and their compatibility other properties. We provide an upper bound on the number of bases $$\mathbb {C}^m\otimes \mathbb {C}^n$$ $$(m\le n)$$ formed rank. particular, product cannot exceed...

Product mix problem (PMP) is one of the most important and complicated problems in production systems. Different approaches have been applied to solve this problem, among them, theory of constraints (TOC) has been widely considered since 1990s. This paper develops a distinguished algorithm to solve product mix prob-lems that is efficient both in single and multi-bottleneck problems. At first, t...

markowitz, in his portfolio selection theory, stated that investors select their portfolios according to two criteria of risk and return. accordingly, he presented his mathematical model. one of the criticisms of this model is that while investors, practically, consider different criteria in forming their portfolios, it only considers the return mean and return standard deviation. liquidity is ...

stress refers to the degree of force used in producing a syllable. all of the words in lexicon regardless of the apparent structure and the number of their syllables have their own stress. given that the regularities governing stress assignment in persian depend on the type of lexical category and that persian speakers have a tendency to assign stress at the end of words, the goal of the presen...

We propose a position-based approach for largescale simulations of rigid bodies at interactive frame-rates. Our method solves positional constraints between rigid bodies and therefore integrates nicely with other position-based methods. Interaction of particles and rigid bodies through common constraints enables two-way coupling with deformables. The method exhibits exceptional performance and ...