منابع مشابه
The Evolution of Ellipticals, Spirals and Irregulars: Overcoming Selection Bias
The Hubble Deep Fields represent our best opportunity for probing galaxy evolution over a substantive look-back time. However as with any dataset the HDFs are prone to selection biases. These biases are extremely severe beyond z ∼ 1.25 such that a meaningful interpretation of generic galaxy evolution is not possible. We can however extract well defined volume-limited samples at z < 1. The data ...
متن کاملIrreversible quantum baker map.
We propose a generalization of the model of classical baker map on the torus, in which the images of two parts of the phase space do overlap. This transformation is irreversible and cannot be quantized by means of a unitary Floquet operator. A corresponding quantum system is constructed as a completely positive map acting in the space of density matrices. We investigate spectral properties of t...
متن کاملUnivalent Baker Domains
We classify Baker domains U for entire maps with fj U univalent into three diierent types, giving several criteria which characterize them. Some new examples of such domains are presented, including a domain with disconnected boundary in C and a domain which spirals towards innnity.
متن کاملThe Peano-baker Series
Abstract. This note reviews the Peano-Baker series and its use to solve the general linear system of ODEs. The account is elementary and self-contained, and is meant as a pedagogic introduction to this approach, which is well known but usually treated as a folklore result or as a purely formal tool. Here, a simple convergence result is given, and two examples illustrate that the series can be u...
متن کاملOccupy Wall Street, Bay Street and the street nearest you.
The Canadian Centre for Policy Alternatives released a study in early January highlighting the growing income disparities between the richest and poorest Canadians. Income tax files from 2007 show that the average income of the top 1% of income earners was over $400,000 compared to about $44,000 for the average Canadian, almost a tenfold difference. Those who laboured at the minimum wage earned...
متن کاملذخیره 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: College & Research Libraries News
سال: 1971
ISSN: 2150-6698,0099-0086
DOI: 10.5860/crln.32.5.142