Positivity of Stable Densities

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Positivity of Brownian Transition Densities

Let B be a Borel subset of R and let p(t, x, y) be the transition densities of Brownian motion killed on leaving B. Fix x and y in B. If p(t, x, y) is positive for one t, it is positive for every value of t. Some related results are given. 1. Statement of results. Let d ≥ 2, let B be a Borel subset of R, and let p(t, x, y) denote the transition density of d-dimensional Brownian motion killed on...

متن کامل

Positivity of Heights of Semi-stable Varieties

Let K be a number field and OK its ring of integers. Let E be an OK-module of rank N + 1 in P(E), the projective space representing lines in E. For all closed subvarieties X ⊆ P(E K) of dimension d let deg(X) be its degree with respect to the canonical line bundle O(1) of P(E K). If E is endowed with the structure of hermitian vector bundle over Spec(OK) we can define the Arakelov degree d̂eg ( ...

متن کامل

The Effect of Positivity Constraints on Polarized Parton Densities

The impact of positivity constraints on the polarized parton densities has been studied. Special attention has been paid to the role of positivity constraints in determining the polarized strange quark and gluon densities, which are not well determined from the present data on inclusive polarized DIS. Spurred on by the famous European Muon Collaboration (EMC) experiment [1] at CERN in 1987, the...

متن کامل

A practical criterion for positivity of transition densities

We establish a simple criterion for locating points where the transition density of a degenerate diffusion is strictly positive. Throughout, we assume that the diffusion satisfies a stochastic differential equation (SDE) on R d with additive noise and polynomial drift. In this setting, we will see that it is often that case that local information of the flow, e.g. the Lie algebra generated by t...

متن کامل

Role of Positivity Constraints in Determining Polarized Parton Densities

We have re-analyzed the world data on inclusive polarized DIS, in both NLO and LO QCD, including the very precise JLab Hall A neutron data, and have studied the role of positivity constraints, and demonstrated their importance, in determining the strange and gluon densities. We have shown that higher twist corrections are essential in the analysis of the present data on the structure function g...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Proceedings of the American Mathematical Society

سال: 1988

ISSN: 0002-9939

DOI: 10.2307/2047352