Results 31 to 40 of about 285,483 (304)
Epidemiological characteristics of four common respiratory viral infections in children
Virology Journal, 2021 Background Viruses are the main infectious agents of acute respiratory infections in children. We aim to describe the epidemiological characteristics of viral pathogens of acute respiratory tract infections in outpatient children. Methods From April 2018
Guohong Zhu +6 more
doaj +1 more source
Combinatorics and total positivity
Journal of Combinatorial Theory, Series A, 1995 An infinite real matrix \(M\) is said to be totally positive (TP) if every minor of \(M\) has nonnegative determinant. The purpose of the article is to show that many familiar matrices arising in combinatorics and the theory of symmetrical functions have this property.
openaire +1 more source
MathematicsGeneralized order statistics (GOSs) are often adopted as a tool for providing a unified approach to several stochastic models dealing with ordered random variables. In this contribution, we first recall various useful results based on the notion of total
Maryam Esna-Ashari +3 more
doaj +1 more source
Total Positivity in Symmetric Spaces
Representation Theory, 2022 In this paper we extend the theory of total positivity for reductive groups to the case of symmetric spaces.
openaire +2 more sources
Total positivity of Narayana matrices [PDF]
Discrete Mathematics, 2018 We prove the total positivity of the Narayana triangles of type $A$ and type $B$, and thus affirmatively confirm a conjecture of Chen, Liang and Wang and a conjecture of Pan and Zeng. We also prove the strict total positivity of the Narayana squares of type $A$ and type $B$.
Yi Wang 0027, Arthur L. B. Yang
openaire +3 more sources
Monotonic Random Variables According to a Direction
AxiomsIn this paper, we introduce the concept of monotonicity according to a direction for a set of random variables. This concept extends well-known multivariate dependence notions, such as corner set monotonicity, and can be used to detect dependence in ...
José Juan Quesada-Molina +1 more
doaj +1 more source
Strictly Totally Positive Systems
Journal of Approximation Theory, 1998 Let \(F(A)\) denote the set of all real-valued functions defined on \(A\subset \mathbb{R}\). A system \(U_n= \{u_0, \dots, u_n\} \subset F(A)\), is called a \(T\)-system if Cardinal \(A \geq n+1\), the functions in \(U_n\) are linearly independent on \(A\), and all the determinants of the square collocation matrices \[ M{u_0, \dots, u_n \choose t_0 ...
Carnicer, J.M., Peña, J.M., Zalik, R.A.
openaire +2 more sources
Pediatric Blood &Cancer, EarlyView.ABSTRACT Primary lung carcinomas and bronchial carcinoid tumors (BC) are very rare malignancies in childhood. While typical BC and mucoepidermoid carcinomas are mostly low‐grade, localized tumors with a more favorable prognosis than in adults, necessitating avoidance of overtreatment, adenocarcinomas of the lung are often diagnosed at advanced disease ...
Michael Abele +19 more
wiley +1 more source
Total positivity of Catalan triangle
Discrete Mathematics, 2015 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Charles Zhao-Chen Wang, Yi Wang 0027
openaire +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen +23 more
wiley +1 more source