N-anti-exchange closure operators
Natural generalization of some lattice theory concepts to partially ordered sets
ndependence of axioms for biordered sets.
Near lattices
Negaciones en retículos completos.
New progress in enumeration of mixed models.
New results for EP matrices in indefinite inner product spaces
In this paper we study -EP matrices, as a generalization of EP-matrices in indefinite inner product spaces, with respect to indefinite matrix product. We give some properties concerning EP and -EP matrices and find connection between them. Also, we present some results for reverse order law for Moore-Penrose inverse in indefinite setting. Finally, we deal with the star partial ordering and improve some results given in the “EP matrices in indefinite inner product spaces” (2012), by relaxing some...
Noncommutative extensions of the Fourier transform and its logarithm
We introduce noncommutative extensions of the Fourier transform of probability measures and its logarithm to the algebra (S) of complex-valued functions on the free semigroup S = FS(z,w) on two generators. First, to given probability measures μ, ν with all moments finite, we associate states μ̂, ν̂ on the unital free *-bialgebra (ℬ,ε,Δ) on two self-adjoint generators X,X’ and a projection P. Then we introduce and study cumulants which are additive under the convolution μ̂* ν̂ = μ̂ ⊗ ν̂ ∘ Δ when...
Nonexistence of nonmolecular generic sets.
Non-modular and non-distributive primitive ordered subsets of lattices
Nonstandard implication algebras
Normal Fitting Classes and the Lockett Ordering.
Note on canonizing ordering theorems for Hales Jewett structures
Note on compatible well orders on a free monoid.
Note on Demi-Topological Functors.
Note on orthocomplemented posets II.
Note on quasi-orders, partial orders and orders
Note on transformations of posets with the same upper bound graph and minimal elements.
Note on -filters in distributive nearlattices
In this short paper we introduce the notion of -filter in the class of distributive nearlattices and we prove that the -filters of a normal distributive nearlattice are strongly connected with the filters of the distributive nearlattice of the annihilators.