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  1. No Access

    Chapter and Conference Paper

    Penalty Function Based Critical Point Approach to Compute Real Witness Solution Points of Polynomial Systems

    We present a critical point method based on a penalty function for finding certain solution (witness) points on real solutions components of general real polynomial systems. Unlike other existing numerical met...

    Wenyuan Wu, Changbo Chen, Greg Reid in Computer Algebra in Scientific Computing (2017)

  2. No Access

    Chapter and Conference Paper

    Full Rank Representation of Real Algebraic Sets and Applications

    We introduce the notion of the full rank representation of a real algebraic set, which represents it as the projection of a union of real algebraic manifolds ...

    Changbo Chen, Wenyuan Wu, Yong Feng in Computer Algebra in Scientific Computing (2017)

  3. Article

    Open Access

    Bell’s Nonlocality Can be Detected by the Violation of Einstein-Podolsky-Rosen Steering Inequality

    Recently quantum nonlocality has been classified into three distinct types: quantum entanglement, Einstein-Podolsky-Rosen steering, and Bell’s nonlocality. Among which, Bell’s nonlocality is the strongest type...

    **g-Ling Chen, Changliang Ren, Changbo Chen, **ang-Jun Ye in Scientific Reports (2016)

  4. No Access

    Article

    Diverse bacterial symbionts of insect-pathogentic fungi and possible impact on the maintenance of virulence during infection

    Bacterial-fungal interactions (BFIs) which have important ramifications for the biology of the interacting partners have been demonstrated extensively. Here we show for the first time that diverse bacterial sy...

    Chun Chen, **angbo Chen, Tingna **e, Justin Louis Hatting, ** Yu in Symbiosis (2016)

  5. No Access

    Chapter and Conference Paper

    A Numerical Method for Computing Border Curves of Bi-parametric Real Polynomial Systems and Applications

    For a bi-parametric real polynomial system with parameter values restricted to a finite rectangular region, under certain assumptions, we introduce the notion of border curve. We propose a numerical method to ...

    Changbo Chen, Wenyuan Wu in Computer Algebra in Scientific Computing (2016)

  6. No Access

    Chapter and Conference Paper

    Regular Chains under Linear Changes of Coordinates and Applications

    Given a regular chain, we are interested in questions like computing the limit points of its quasi-component, or equivalently, computing the variety of its saturated ideal. We propose techniques relying on lin...

    Parisa Alvandi, Changbo Chen, Amir Hashemi in Computer Algebra in Scientific Computing (2015)

  7. No Access

    Chapter and Conference Paper

    Simplification of Cylindrical Algebraic Formulas

    For a set S of cells in a cylindrical algebraic decomposition of ℝ n , we introduce the notion of generalized cylindrical algebraic formula (GCAF) associated with S. We propose a...

    Changbo Chen, Marc Moreno Maza in Computer Algebra in Scientific Computing (2015)

  8. Article

    Open Access

    Miscibility and ordered structures of MgO-ZnO alloys under high pressure

    The MgxZn1−xO alloy system may provide an optically tunable family of wide band gap materials that can be used in various UV luminescences, absorption, lighting and display applications. A systematic investigatio...

    Fubo Tian, Defang Duan, Da Li, Changbo Chen, **ao**g Sha in Scientific Reports (2014)

  9. Article

    Open Access

    Nitrogen concentration driving the hardness of rhenium nitrides

    The structures and properties of rhenium nitrides are studied with density function based first principle method. New candidate ground states or high-pressure phases at Re:N ratios of 3:2, 1:3 and 1:4 are iden...

    Zhonglong Zhao, Kuo Bao, Da Li, Defang Duan, Fubo Tian, **lian ** in Scientific Reports (2014)

  10. No Access

    Chapter and Conference Paper

    Solving Parametric Polynomial Systems by RealComprehensiveTriangularize

    In the authors’ previous work, the concept of comprehensive triangular decomposition of parametric semi-algebraic systems (RCTD for short) was introduced. For a given parametric semi-algebraic system, say S, a...

    Changbo Chen, Marc Moreno Maza in Mathematical Software – ICMS 2014 (2014)

  11. No Access

    Chapter and Conference Paper

    The Basic Polynomial Algebra Subprograms

    The Basic Polynomial Algebra Subprograms (BPAS) provides arithmetic operations (multiplication, division, root isolation, etc.) for univariate and multivariate polynomials over prime fields or with integer coeffi...

    Changbo Chen, Svyatoslav Covanov, Farnam Mansouri in Mathematical Software – ICMS 2014 (2014)

  12. No Access

    Chapter and Conference Paper

    Cylindrical Algebraic Decomposition in the RegularChains Library

    Cylindrical algebraic decomposition (CAD) is a fundamental tool in computational real algebraic geometry and has been implemented in several software. While existing implementations are all based on Collins’ p...

    Changbo Chen, Marc Moreno Maza in Mathematical Software – ICMS 2014 (2014)

  13. No Access

    Chapter and Conference Paper

    Doing Algebraic Geometry with the RegularChains Library

    Traditionally, Groebner bases and cylindrical algebraic decomposition are the fundamental tools of computational algebraic geometry. Recent progress in the theory of regular chains has exhibited efficient algo...

    Parisa Alvandi, Changbo Chen, Steffen Marcus in Mathematical Software – ICMS 2014 (2014)

  14. No Access

    Chapter and Conference Paper

    Real Quantifier Elimination in the RegularChains Library

    Quantifier elimination (QE) over real closed fields has found numerous applications. Cylindrical algebraic decomposition (CAD) is one of the main tools for handling quantifier elimination of nonlinear input fo...

    Changbo Chen, Marc Moreno Maza in Mathematical Software – ICMS 2014 (2014)

  15. No Access

    Chapter and Conference Paper

    Truth Table Invariant Cylindrical Algebraic Decomposition by Regular Chains

    A new algorithm to compute cylindrical algebraic decompositions (CADs) is presented, building on two recent advances. Firstly, the output is truth table invariant (a TTICAD) meaning given formulae have constan...

    Russell Bradford, Changbo Chen in Computer Algebra in Scientific Computing (2014)

  16. No Access

    Chapter and Conference Paper

    Real Root Isolation of Regular Chains

    We present an algorithm RealRootIsolate for isolating the real roots of a polynomial system given by a zerodimensional squarefree regular chain. The output of the algorithm is guaranteed in the sense that all rea...

    François Boulier, Changbo Chen, François Lemaire, Marc Moreno Maza in Computer Mathematics (2014)

  17. No Access

    Chapter and Conference Paper

    An Incremental Algorithm for Computing Cylindrical Algebraic Decompositions

    In this paper, we propose an incremental algorithm for computing cylindrical algebraic decompositions. The algorithm consists of two parts: computing a complex cylindrical tree and refining this complex tree i...

    Changbo Chen, Marc Moreno Maza in Computer Mathematics (2014)

  18. No Access

    Chapter and Conference Paper

    Problem Formulation for Truth-Table Invariant Cylindrical Algebraic Decomposition by Incremental Triangular Decomposition

    Cylindrical algebraic decompositions (CADs) are a key tool for solving problems in real algebraic geometry and beyond. We recently presented a new CAD algorithm combining two advances: truth-table invariance, ...

    Matthew England, Russell Bradford, Changbo Chen in Intelligent Computer Mathematics (2014)

  19. No Access

    Chapter and Conference Paper

    Computing the Limit Points of the Quasi-component of a Regular Chain in Dimension One

    For a regular chain R in dimension one, we propose an algorithm which computes the (non-trivial) limit points of the quasi-component of R, that is, the set ...

    Parisa Alvandi, Changbo Chen, Marc Moreno Maza in Computer Algebra in Scientific Computing (2013)

  20. No Access

    Article

    Hsp90 stress potentiates rapid cellular adaptation through induction of aneuploidy

    Aneuploidy is shown to be induced by pleiotropic stress conditions (especially Hsp90 inhbition) in yeast, leading to stress adaptation.

    Guangbo Chen, William D. Bradford, Chris W. Seidel, Rong Li in Nature (2012)

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