A necessary and sufficient condition that an operator be normal

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

A Necessary and Sufficient Condition for Transcendency

As has been known for many years (see, e.g., K. Mahler, /. Reine Angew. Math., v. 166, 1932, pp. 118-150), a real or complex number f is transcendental if and only if the following condition is satisfied. To every positive number co there exists a positive integer n and an infinite sequence of distinct polynomials {p,(z)} = {pr + pr z + • • • + p z } at most of 0 1 n degree n with integral coef...

متن کامل

A Necessary and Sufficient Condition for Peace∗

This paper examines the possibility for two contestants to agree on a peace settlement thereby avoiding a contest, in which each would exert a costly effort given the posterior distributions inferred from the negotiation. I find a necessary and sufficient condition of the prior distributions for there to exist a negotiation mechanism that admits a peace-ensuring perfect Bayesian equilibrium. Th...

متن کامل

A Sufficient Condition That a C-Characteristic Be Geometric.

These inequalities express the fact that no curve of order k and defined at the p points can meet the net in more than yok points. Coble' has conjectured that the conditions (1) and (2) are sufficient as well as necessary. In this paper we will show that the conditions (2) are actually sufficient. Indeed, the less stringent set of inequalities given in (5) will suffice. The notation and point o...

متن کامل

A Necessary and Sufficient Condition for Peace An Extended Abstract

Under what conditions can potential contestants avoid conflicts through a peace settlement? This question is relevant to real world situations such as international conflicts and pre-litigation negotiations. In the spirit of Myerson and Satterthwaite [4] on bilateral trade, where information asymmetry is the impediment to mutually beneficial negotiation outcomes, a natural approach to address t...

متن کامل

A necessary and sufficient eigenvector condition for a connected graph to be bipartite

We give a necessary and sufficient condition for a graph to be bipartite in terms of an eigenvector corresponding to the largest eigenvalue of the adjacency matrix of the graph.

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: Journal of Mathematical Analysis and Applications

سال: 1968

ISSN: 0022-247X

DOI: 10.1016/0022-247x(68)90155-8