Results 11 to 20 of about 911,522 (334)

Quadratic and Quasi-Quadratic Functionals [PDF]

open access: yesProceedings of the American Mathematical Society, 1993
In this note we show how Jordan ∗ {\ast } -derivations arise as a "measure" of the representability of quasi-quadratic functionals by sesquilinear ones. Our main result can be considered as an extension of the Jordan-von Neumann characterization of pre-Hilbert space.
openaire   +1 more source

Nitrogen application improved the growth and yield performance of sweetpotato (lpomoea batatas (L.) Lam.)

open access: yesAnnals of Tropical Research, 2020
Nitrogen is one of the most critical nutrients affecting sweetpotato yield. This study was conducted to 1) evaluate the growth and yield response of sweetpotato NSIC SP 33 to different levels of N; and 2) determine the relationship between N level and ...
Flore-Anne C. Relente, Luz G. Asio
doaj   +1 more source

Quadratic forms and linear algebraic groups [PDF]

open access: yes, 2009
Topics discussed at the workshop Quadratic Forms and Linear Algebraic Groups included besides the algebraic theory of quadratic and Hermitian forms and their Witt groups several aspects of the theory of linear algebraic groups and homogeneous varieties ...
Harbater, David   +2 more
core   +1 more source

Principal Quadratic Functionals [PDF]

open access: yesTransactions of the American Mathematical Society, 1976
The general theory of the existence of a minimum limit in the fixed and variable end point problems of singular quadratic functionals of n dependent variables is developed, generalizing the one dimensional results of Marston Morse, Walter Leighton and A. D. Martin and completing a phase of the n-dimensional theory initiated recently by the author.
openaire   +1 more source

Principal quadratic functionals [PDF]

open access: yesTransactions of the American Mathematical Society, 1949
This paper is a continuation of a study undertaken earlier by Marston Morse and the writer [ML, 1](2). While the present paper is essentially selfcontained, some familiarity on the part of the reader with the earlier paper, particularly with the importance of the singularity function in studying the minimizing of singular quadratic functionals when ...
openaire   +1 more source

Fuzzy Almost Quadratic Functions [PDF]

open access: yesResults in Mathematics, 2008
17 ...
Mirmostafaee, A. K., Moslehian, M. S.
openaire   +2 more sources

A Novel Method for Optimal Control of Piecewise Affine Systems Using Semi-Definite Programming [PDF]

open access: yesInternational Journal of Industrial Electronics, Control and Optimization, 2020
: In this paper, a novel optimal control design method by discontinuous quadratic Lyapunov function and continuous quadratic Lyapunov function for 2-dimensional piecewise affine systems via semi-definite programming and LMI constraints is proposed.In ...
Majid Akbarian   +2 more
doaj   +1 more source

El concepto de Rectángulo Equivalente para la caracterización de la forma de una cuenca

open access: yesEcomatemático, 2018
In this work the importance of the teaching of geometry as a modeler of the space in which people are immersed is rescued. For this, is showed the resolution of a problem related to a certain types of disciplines such as cartography, geography, and ...
Alejandra Cañibano , Marcelo Gandini
doaj   +1 more source

Geometry-Based Conditions for a Quadratic Function: Application to Stability of Time-Varying Delay Systems

open access: yesIEEE Access, 2020
In this paper, novel geometry-based negative conditions are presented for a quadratic function with time-varying delays. The system performance could be optimal by adjusting a parameter value.
Tae H. Lee
doaj   +1 more source

The stability analysis of systems with nonlinear feedback expressed by a quadratic program [PDF]

open access: yes, 2006
We consider the stability of the feedback connection of a stable linear time invariant (LTI) plant with a static nonlinearity expressed by a certain class of quadratic program (QP).
Heath, WP, Lennox, B, Li, G
core   +2 more sources

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