Results 31 to 40 of about 348,325 (281)

Enumerative Real Algebraic Geometry [PDF]

open access: yesAlgorithmic and Quantitative Aspects of Real Algebraic Geometry in Mathematics and Computer Science, 2001
Two well-defined classes of structured polynomial systems have been studied from this point of view—sparse systems, where the structure is encoded by the monomials in the polynomials fi—and geometric systems, where the structure comes from geometry. This
F. Sottile
semanticscholar   +1 more source

Topics in Algebraic Deformation Theory

open access: yes, 2010
We give a selective survey of topics in algebraic deformation theory ranging from its inception to current times. Throughout, the numerous contributions of Murray Gerstenhaber are emphasized, especially the common themes of cohomology, infinitesimal ...
Giaquinto, Anthony
core   +1 more source

Computer Algebra and Algebraic. Geometry-Achievements and Perspectives [PDF]

open access: yesJournal of symbolic computation, 2000
In this survey I should like to introduce some concepts of algebraic geometry and try to demonstrate the fruitful interaction between algebraic geometry and computer algebra and, more generally, between mathematics and computer science.
G. Greuel
semanticscholar   +1 more source

Essential Killing fields of parabolic geometries

open access: yes, 2013
We study vector fields generating a local flow by automorphisms of a parabolic geometry with higher order fixed points. We develop general tools extending the techniques of [1], [2], and [3].
Melnick, Karin, Čap, Andreas
core   +1 more source

Polyhedral Methods in Numerical Algebraic Geometry [PDF]

open access: yes, 2008
In numerical algebraic geometry witness sets are numerical representations of positive dimensional solution sets of polynomial systems. Considering the asymptotics of witness sets we propose certificates for algebraic curves.
J. Verschelde
semanticscholar   +1 more source

Galois groups of Schubert problems via homotopy computation

open access: yes, 2007
Numerical homotopy continuation of solutions to polynomial equations is the foundation for numerical algebraic geometry, whose development has been driven by applications of mathematics.
Leykin, Anton, Sottile, Frank
core   +8 more sources

Physical Origin of Temperature Induced Activation Energy Switching in Electrically Conductive Cement

open access: yesAdvanced Science, EarlyView.
The temperature‐induced Arrhenius activation energy switching phenomenon of electrical conduction in electrically conductive cement originates from structural degradation within the biphasic ionic‐electronic conduction architecture and shows percolation‐governed characteristics: pore network opening dominates the low‐percolation regime with downward ...
Jiacheng Zhang   +7 more
wiley   +1 more source

A view on extending morphisms from ample divisors

open access: yes, 2009
The philosophy that ``a projective manifold is more special than any of its smooth hyperplane sections" was one of the classical principles of projective geometry.
Beltrametti, Mauro C., Ionescu, Paltin
core   +2 more sources

Robust C–V Ratio Technique for Profiling Defects in Proton‐Irradiated 4H‐SiC

open access: yesAdvanced Electronic Materials, EarlyView.
A noise‐robust C–V ratio technique is introduced to profile radiation‐induced defects in proton‐irradiated 4H‐SiC Schottky diodes. By using analytical capacitance ratios instead of numerical differentiation, the method directly extracts trap‐density and effective trap‐energy profiles at room temperature.
Kibeom Kim   +4 more
wiley   +1 more source

A Unified Algebraic Approach to Classical Yang-Baxter Equation

open access: yes, 2007
In this paper, the different operator forms of classical Yang-Baxter equation are given in the tensor expression through a unified algebraic method.
Bakalov B   +19 more
core   +2 more sources

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