منابع مشابه
Measurement of gram-positiveness.
Several papers have been published (Kennedy and Barbaro, 1953; Barbaro and Kennedy, 1954; Bartholomew and Finkelstein, 1954; Kennedy and Woodhour, 1956; Barbaro et al., 1956) on methods of comparing degrees of gram-positiveness and the influence of certain factors on the quantity of crystal violet retained by the microorganisms. These papers compare the degrees of gram-positiveness by measuring...
متن کاملAsymptotic Positiveness of Linear Recurrence Sequences
Suppose that the first several terms of a sequence are given, then it is not so easy to predict the asymptotic behavior of this sequence. But once we know that this given sequence is a linear recurrence sequence, we can determine the asymptotic behavior through its recurrence formula. Indeed, John R. Burke and William A. Webb [1] considered real linear recurrence sequences iun}TM=Q of order d d...
متن کاملBounds for Absolute Positiveness of Multivariate Polynomials
A multivariate polynomial P (x1, . . . , xn) with real coefficients is said to be absolutely positive from a real number B iff it and all of its non-zero partial derivatives of every order are positive for x1, . . . , xn ≥ B. We also call such B a bound for the absolute positiveness of P . The main goal of this paper is to devise a “nice” formula for computing a bound of a given polynomial. The...
متن کاملBounds on absolute positiveness of multivariate polynomials
We propose a general framework for obtaining bounds on absolute positiveness of multivariate polynomials. We show that a known bound by Hong is a nearly optimal bound within this framework. We also derive quality results for any bound in this framework, and then propose a general approach to improve the quality of any such bound.
متن کاملNumerical verification of positiveness for solutions to semilinear elliptic problems
In this paper, we propose a numerical method for verifying the positiveness of solutions to semilinear elliptic boundary value problems. We provide a sufficient condition for a solution to an elliptic problem to be positive in the domain of the problem, which can be checked numerically without requiring a complicated computation. Although we focus on the homogeneous Dirichlet case in this paper...
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: Journal of Bacteriology
سال: 1960
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.79.4.461-463.1960