Results 21 to 30 of about 467 (189)

Advanced Interpretation of Field Cycling NMR Relaxometry Dispersion Profiles From Hard and Soft Materials. [PDF]

Magn Reson Chem
This review demonstrates that NMR dispersion profiles from fast field cycling NMR relaxometry can be interpreted with the 3‐Tau model for a broad spectrum of soft and hard materials. Meaningful physical quantities provide insight into surface chemistry, bound water density, pore size, aqueous or solid iron (III) density and the free water diffusion ...
Faux DA, Kogon R.
europepmc   +2 more sources

On homological classification of pomonoids by regular weak injectivity properties of S-posets

Open Mathematics, 2007
Abstract If S is a partially ordered monoid then a right S-poset is a poset A on which S acts from the right in such a way that the action is compatible both with the order of S and A. By regular weak injectivity properties we mean injectivity properties with respect to all regular monomorphisms (not all monomorphisms) from different ...
Zhang Xia, Laan Valdis
doaj   +2 more sources

COGENERATOR AND SUBDIRECTLY IRREDUCIBLE IN THE CATEGORY OF S-POSETS [PDF]

Journal of Algebraic Systems, 2015
In this paper we study the notions of cogenerator and subdirectlyirreducible in the category of S-poset. First we give somenecessary and sufficient conditions for a cogenerator $S$-posets.Then we see that under some conditions, regular injectivityimplies
Gholamreza Moghaddasi
doaj   +1 more source

Paths to Understanding Birational Rowmotion on Products of Two Chains [PDF]

, 2018
Birational rowmotion is an action on the space of assignments of rational functions to the elements of a finite partially-ordered set (poset). It is lifted from the well-studied rowmotion map on order ideals (equivariantly on antichains) of a poset $P ...
Musiker, Gregg, Roby, Tom
core   +3 more sources

A two-sided analogue of the Coxeter complex [PDF]

Discrete Mathematics & Theoretical Computer Science, 2020
For any Coxeter system (W, S) of rank n, we introduce an abstract boolean complex (simplicial poset) of dimension 2n − 1 which contains the Coxeter complex as a relative subcomplex.
T. Kyle Petersen
doaj   +1 more source

A birational lifting of the Stanley-Thomas word on products of two chains [PDF]

Discrete Mathematics & Theoretical Computer Science, 2021
The dynamics of certain combinatorial actions and their liftings to actions at the piecewise-linear and birational level have been studied lately with an eye towards questions of periodicity, orbit structure, and invariants.
Michael Joseph, Tom Roby
doaj   +1 more source

Superatomic Boolean algebras constructed from strongly unbounded functions [PDF]

, 2010
Using Koszmider's strongly unbounded functions, we show the following consistency result: Suppose that $\kappa,\lambda$ are infinite cardinals such that $\kappa^{+++} \leq \lambda$, $\kappa^{
Martinez, Juan Carlos, Soukup, Lajos
core   +2 more sources

Homomesy in products of two chains [PDF]

Discrete Mathematics & Theoretical Computer Science, 2013
Many cyclic actions $τ$ on a finite set $\mathcal{S}$ ; of combinatorial objects, along with a natural statistic $f$ on $\mathcal{S}$, exhibit ``homomesy'': the average of $f$ over each $τ$-orbit in $\mathcal{S} $ is the same as the average of $f$ over ...
James Propp, Tom Roby
doaj   +1 more source

On Morita equivalence of partially ordered semigroups with local units [PDF]

, 2011
We show that for two partially ordered semigroups S and T with common local units, there exists a unitary Morita context with surjective maps if and only if the categories of closed right S- and T-posets are ...
Tart, Lauri
core   +2 more sources

Applications of stochastic analysis and algebra to machine learning [PDF]

, 2023
In this thesis we consider the application of tools from stochastic analysis and algebra to statistics and machine learning. Most of these tools are different forms of what has become known as signature methods.
Bonnier, Patric Ossian Mauritz
core   +2 more sources