Results 21 to 30 of about 475,676 (254)
Factorizations for q-Pascal matrices of two variables
Special Matrices, 2015 In this second article on q-Pascal matrices, we show how the previous factorizations by the summation matrices and the so-called q-unit matrices extend in a natural way to produce q-analogues of Pascal matrices of two variables by Z. Zhang and M.
Ernst Thomas
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The Panorama of Spin Matrix theory
Journal of High Energy Physics, 2023 Spin Matrix theory describes near-BPS limits of N $$ \mathcal{N} $$ = 4 SYM theory, which enables us to probe finite N effects like D-branes and black hole physics.
Stefano Baiguera +2 more
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Improved Performance of Model Fit Indices with Small Sample Sizes in Cognitive Diagnostic Models
International Journal of Assessment Tools in Education, 2019 Selecting an appropriate cognitive diagnostic model (CDM) for data analysis is always challenging. Studies have explored several model fit indices for CDMs.
Ya-huei Yang, Hueying Tzou
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Limit-point criteria for the matrix Sturm-Liouville operator and its powers [PDF]
Opuscula Mathematica, 2017 We consider matrix Sturm-Liouville operators generated by the formal expression \[l[y]=-(P(y^{\prime}-Ry))^{\prime}-R^*P(y^{\prime}-Ry)+Qy,\] in the space \(L^2_n(I)\), \(I:=[0, \infty)\). Let the matrix functions \(P:=P(x)\), \(Q:=Q(x)\) and \(R:=R(x)\)
Irina N. Braeutigam
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On Generalized p,q-Euler Matrix and Associated Sequence Spaces
Journal of Function Spaces, 2021 In this study, we introduce new BK-spaces bsr,tp,q and b∞r,tp,q derived by the domain of p,q-analogue Br,tp,q of the binomial matrix in the spaces ℓs and ℓ∞, respectively.
Taja Yaying +2 more
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A unitary matrix model for q-deformed Plancherel growth
Nuclear Physics B, 2021 In this paper we construct a unitary matrix model that captures the asymptotic growth of Young diagrams under q-deformed Plancherel measure. The matrix model is a q analog of Gross-Witten-Wadia (GWW) matrix model.
Suvankar Dutta +3 more
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Constructing and Validating a Q-Matrix for Cognitive Diagnostic Analysis of a Reading Comprehension Test Battery [PDF]
Journal of English Language Teaching and Learning, 2018 Of paramount importance in the study of cognitive diagnostic assessment (CDA) is the absence of tests developed for small-scale diagnostic purposes. Currently, much of the research carried out has been mainly on large-scale tests, e.g., TOEFL, MELAB ...
Mohammad Alavi, Fatemeh Ranjbaran
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Abstract and Applied Analysis, 2013 The matrix equation ∑l=1uAlXBl+∑s=1vCsXTDs=F, which includes some frequently investigated matrix equations as its special cases, plays important roles in the system theory.
Ning Li, Qing-Wen Wang
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The nonnegative Q−matrix completion problem
Journal of Algebra Combinatorics Discrete Structures and Applications, 2017 Summary: In this paper, the nonnegative \(Q\)-matrix completion problem is studied. A real \(n\times n\) matrix is a \(Q\)-matrix if for \(k\in \{1,\dots, n\}\), the sum of all \(k \times k\) principal minors is positive. A digraph \(D\) is said to have nonnegative \(Q\)-completion if every partial nonnegative \(Q\)-matrix specifying \(D\) can be ...
SARMA, Bhaba Kumar, SİNHA, Kalyan
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On the q-exponential of matrix q-Lie algebras
Special Matrices, 2017 In this paper, we define several new concepts in the borderline between linear algebra, Lie groups and q-calculus.We first introduce the ring epimorphism r, the set of all inversions of the basis q, and then the important q-determinant and corresponding ...
Ernst Thomas
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