Results 31 to 40 of about 284,061 (274)
Generalized quandle polynomials and their applications to stuquandles, stuck links, and RNA folding
Open MathematicsWe introduce a generalization of the quandle polynomial. We prove that our polynomial is an invariant of stuquandles. Furthermore, we use the invariant of stuquandles to define a polynomial invariant of stuck links. As a byproduct, we obtain a polynomial
Bondarenko Ekaterina +3 more
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Certain Invariant Sequences of Polynomials [PDF]
Transactions of the American Mathematical Society, 1929 We discuss certain sequences of uniform functions of one variable such that the derivative of each term of a given sequence is equal to the preceding term, and each term is changed by a linear transformation on the variable into a multiple of itself, the multiplier being a function of the rank of the term alone, and the linear transformation and the ...
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A Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller
International Journal of Adaptive Control and Signal Processing, EarlyView.Block Diagram of the Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller. ABSTRACT This article introduces a discrete‐time robust adaptive one‐sample‐ahead preview super‐twisting sliding mode controller. A stability analysis of the controller by Lyapunov criteria is developed to demonstrate its robustness in handling both ...
Guilherme Vieira Hollweg +5 more
wiley +1 more source
Computing polynomial program invariants [PDF]
Information Processing Letters, 2004 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Müller-Olm, Markus, Seidl, Helmut
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On odd powers of nonnegative polynomials that are not sums of squares
Forum of Mathematics, SigmaWe initiate a systematic study of nonnegative polynomials P such that $P^k$ is not a sum of squares for any odd $k\geq 1$ , calling such P stubborn. We develop a new invariant of a real isolated zero of a nonnegative polynomial in the plane,
Grigoriy Blekherman +2 more
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On (h,k)-Dichotomies for Nonautonomous Linear Difference Equations in Banach Spaces
International Journal of Differential Equations, 2013 This paper considers two general concepts of dichotomy for noninvertible and nonautonomous linear discrete-time systems in Banach spaces. These concepts use two types of dichotomy projections sequences (invariant and strongly invariant) and generalize ...
Mihai Gabriel Babuţia +2 more
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Advanced Engineering Materials, EarlyView.Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt +8 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.It is shown that laser ablation pretreatment under oxygen‐free conditions enables copper–aluminium bonding at significantly lower deformation degrees and improved properties compared to mechanical brushing. Laser ablation further increases interface contact area and induces favourable residual stress states and microstructural compatibility ...
Khemais Barienti +11 more
wiley +1 more source
The Cubic Polynomial Differential Systems with two Circles as Algebraic Limit Cycles
Advanced Nonlinear Studies, 2018 In this paper we characterize all cubic polynomial differential systems in the plane having two circles as invariant algebraic limit cycles.
Giné Jaume, Llibre Jaume, Valls Claudia
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Electronic Journal of Qualitative Theory of Differential Equations, 2001 The purpose of this paper is to prove uniform boundedness and so global existence of solutions for reaction-diffusion systems with a full matrix of diffusion coefficients satisfying a balance law.
Said Kouachi
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