Lattice Hamiltonians with on-site interaction W have W = 0 solutions, that is, many-body singlet eigenstates without double occupation. In particular, W = 0 pairs give a clue to understand the pairing force in repulsive Hubbard models. These eigenstates are found in systems with high enough symmetry, like the square, hexagonal or triangular lattices. By a general theorem, we propose a systemati...

Bose–Einstein (BE) correlations between identical bosons and Fermi–Dirac (FD) correlations between identical fermions lead to an enhancement or a suppression, respectively, of the particle pairs produced close to each other in phase space. The effect is sensitive to the distribution of particle sources in space and time. The strength of the correlations can be expressed by the two-particle corr...

Weak pseudo BL-algebras (WPBL-algebras) are non-commutative fuzzy structures which arise from pseudot-norms (i.e. the non-commutative versions of triangular norms). In this paper, we study the pairs of weak negations on WPBL-algebras, extending the case of weak negations on Esteva–Godo MTL-algebras. A geometrical characterization of the pairs of weak negations in bounded chains is provided. Our...

Common kilka Clupeonella cultriventris (Nordmann, 1840) is a brackish water and small pelagic fish species and is one of the most abundant fishes that live gregariously in the Caspian Sea. A total of 60 specimens of adult common kilka were sampled from two seasons. Fifteen pairs of microsatellites previously developed for A.sapidissima, C. pallasi, C.harengus, and S. pilchardus were tested for ...

The vast majority of proteins do not form functional interactions in physiological conditions. We have considered several sets of protein pairs from S. cerevisiae with no functional interaction reported, denoted as non-interacting pairs, and compared their 3D structures to available experimental complexes. We identified some non-interacting pairs with significant structural similarity with expe...

In this paper we study and prove the existence of some common fixed point theorems for two pairs compatible, weakly compatible occasionally mappings integral type in modular metric spaces. Our results extend generalize Azadifar et al. [2], Rashwan Hammad [28], Rahimpoor et.al. [27], Pariya Aklesh et. [25], Abdou, A. Khamsi,[1], Chirasak [5], Nawab [24], Hanna, al [10].

In this paper, we prove coincidence point for two pair of mappings satisfying (CLR)-property in b-metric spaces. Moreover, also attain unique common fixed weakly compatible pairs.