Aggregation and the Gravity Equation

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود 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

Aggregation of gravity models Aggregation of Gravity Models for Journeys-to-work∗

This paper deals with the use of gravity models to examine journeys-towork. The purpose of the paper is to study very simple examples demonstrating that gravity models may be subject to serious misspecification in aggregate systems. The results are easily interpreted and serve to form a set of ideas that can be extended to general systems. As an outcome of the theoretical analysis, the paper ha...

متن کامل

Covariantising the Beltrami equation in W-gravity

Recently, certain higher dimensional complex manifolds were obtained in [1] by associating a higher dimensional uniformisation to the generalised Teichmüller spaces of Hitchin. The extra dimensions are provided by the “times” of the generalised KdV hierarchy. In this paper, we complete the proof that these manifolds provide the analog of superspace for W-gravity and that Wsymmetry linearises on...

متن کامل

L Theory for the Multidimensional Aggregation Equation

We consider well-posedness of the aggregation equation ∂tu+ div(uv) = 0, v = −∇K ∗ u with initial data in P2(R)∩L(R), in dimensions two and higher. We consider radially symmetric kernels where the singularity at the origin is of order |x|, α > 2−d, and prove local well-posedness in P2(R)∩L(R) for sufficiently large p > ps. In the special case of K(x) = |x|, the exponent ps = d/(d− 1) is sharp f...

متن کامل

Lp Theory for the Multidimensional Aggregation Equation

We consider well-posedness of the aggregation equation ∂tu + div(uv) = 0, v = −∇K ∗ u with initial data in P2(R)∩L(R), in dimensions two and higher. We consider radially symmetric kernels where the singularity at the origin is of order |x|α , α > 2−d, and prove local well-posedness in P2(R)∩L(R) for sufficiently large p > ps. In the special case of K(x) = |x|, the exponent ps = d/(d−1) is sharp...

متن کامل

A blob method for the aggregation equation

Abstract. Motivated by classical vortex blob methods for the Euler equations, we develop a numerical blob method for the aggregation equation. This provides a counterpoint to existing literature on particle methods. By regularizing the velocity field with a mollifier or “blob function”, the blob method has a faster rate of convergence and allows a wider range of admissible kernels. In fact, we ...

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: AEA Papers and Proceedings

سال: 2019

ISSN: 2574-0768,2574-0776

DOI: 10.1257/pandp.20191006