Hasil untuk "q-fin.CP"

J. Mclean

Jing Peng, Ronald J. Williams

T. Crook, E. Feher, G. Larrabee

T. Tanabe, M. Notomi, E. Kuramochi et al.

Kun Wang, Yinglei, Ark-Chew Wong et al.

C. Nguyen, R. Howe

E. Bourinet, T. Soong, K. Sutton et al.

L. Cherfils, Y. Il’yasov

A. Loy, Lendie Follett, H. Hofmann

Abstract In statistical modeling, we strive to specify models that resemble data collected in studies or observed from processes. Consequently, distributional specification and parameter estimation are central to parametric models. Graphical procedures, such as the quantile–quantile (Q–Q) plot, are arguably the most widely used method of distributional assessment, though critics find their interpretation to be overly subjective. Formal goodness of fit tests are available and are quite powerful, but only indicate whether there is a lack of fit, not why there is lack of fit. In this article, we explore the use of the lineup protocol to inject rigor into graphical distributional assessment and compare its power to that of formal distributional tests. We find that lineup tests are considerably more powerful than traditional tests of normality. A further investigation into the design of Q–Q plots shows that de-trended Q–Q plots are more powerful than the standard approach as long as the plot preserves distances in x and y to be the same. While we focus on diagnosing nonnormality, our approach is general and can be directly extended to the assessment of other distributions.

M. Descoteaux, R. Deriche, D. Bihan et al.

N. Tanner, O. Cordin, J. Banroques et al.

E. Frenkel, N. Reshetikhin

We propose the notion of q-characters for finite-dimensional representations of quantum affine algebras. It is motivated by our theory of deformed W-algebras. We show that the q-characters give rise to a homomorphism from the Grothendieck ring of representations of a quantum affine algebra to a polynomial ring. We conjecture that the image of this homomorphism is equal to the intersection of certain "screening operators". We also discuss the connection between q-characters and Bethe Ansatz.

M. Million, F. Thuny, H. Richet et al.

J. Wu, Lu Zhang, X. F. Zhang

C. Hennessy

M. Annaby, Z. Mansour

G. Phillips

J. Mond, T. Myers, R. Crosby et al.

Jerry N. Luftman, Rajkumar M. Kempaiah, Q. Uarterly

H. Thal