Results 21 to 30 of about 519,259 (281)
Regression with an imputed dependent variable
Journal of Applied Econometrics, Volume 37, Issue 7, Page 1277-1294, November/December 2022., 2022 Summary Researchers are often interested in the relationship between two variables, with no single data set containing both. A common strategy is to use proxies for the dependent variable that are common to two surveys to impute the dependent variable into the data set containing the independent variable.
Thomas F. Crossley +2 more
wiley +1 more source
A zero-dimensional approach to compute real radicals [PDF]
Computer Science Journal of Moldova, 2008 The notion of real radicals is a fundamental tool in Real Algebraic Geometry. It takes the role of the radical ideal in Complex Algebraic Geometry. In this article I shall describe the zero-dimensional approach and efficiency improvement I have found ...
Silke J. Spang
doaj
Automated handling of complex chemical structures in Z‐matrix coordinates—The chemcoord library
Journal of Computational Chemistry, Volume 44, Issue 5, Page 710-726, February 15, 2023., 2023 We propose an algorithm for a chemically intuitive automatically generated Z‐matrix representation, including reliable back‐and‐forth transformation between coordinate spaces while properly handling linear dependencies. The usefulness of the method is showcased for molecule manipulation and initial guesses of reaction pathways.
Oskar Weser +2 more
wiley +1 more source
Dualities in convex algebraic geometry [PDF]
Rendiconti di Matematica e delle Sue Applicazioni, 2010 Convex algebraic geometry concerns the interplay between optimization theory and real algebraic geometry. Its objects of study include convex semialgebraic sets that arise in semidefinite programming and from sums of squares. This article compares three
Philipp Rostalski, Bernd Sturmfels
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Bundles over Quantum RealWeighted Projective Spaces
Axioms, 2012 The algebraic approach to bundles in non-commutative geometry and the definition of quantum real weighted projective spaces are reviewed. Principal U(1)-bundles over quantum real weighted projective spaces are constructed.
Tomasz Brzeziński, Simon A. Fairfax
doaj +1 more source
Real structures on complex algebraic varieties with a reductive group action [PDF]
arXiv, 2022 This is a survey article devoted to the study of real structures on complex algebraic varieties endowed with a reductive group action.
arxiv
Stratifications of the moduli space of curves and related questions [PDF]
Rendiconti di Matematica e delle Sue Applicazioni, 2014 We discuss results and open problem on the geometry of the moduli space of complex curves, with special emphasis on vanishing results in cohomology and in the tautological ring.
Gabriele Mondello
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Braid monodromy and Alexander polynomials of real plane curves [PDF]
arXiv, 2023 We describe symmetries of the braid monodromy decomposition for a class of plane curves defined over reals including the real curves with no real points and proving new divisibility relations for Alexander invariants of such curves.
arxiv
Infinite families of inequivalent real circle actions on affine four-space [PDF]
Épijournal de Géométrie Algébrique, 2019 The main result of this article is to construct infinite families of non-equivalent equivariant real forms of linear C*-actions on affine four-space. We consider the real form of $\mathbb{C}^*$ whose fixed point is a circle.
Lucy Moser-Jauslin
doaj +1 more source
Domain Decomposition With Non-Conforming Polyhedral Grids
IEEE Access, 2021 A novel mortar approach for the domain decomposition of field problems discretized in terms of nodal variables by the cell method is here proposed.
Federico Moro, Lorenzo Codecasa
doaj +1 more source