Portfolio Value Management
Portfolio value management deals with the problem of how to determine a portfolio such that the associated portfolio value moves in some desired direction. Two models of portfolio management are presented. The first (second) model considers the case where the portfolio value moves exactly (at least) according to given growth rates. A solution of both models is found by using a fixed-point argument.
A revised simplex method for linear multiple objective programs
For linear multiple-objective problems, a necessary and sufficient condition for a point to be efficient is employed in the development of a revised simplex algorithm for the enumeration of the set of efficient extreme points. Five options within this algorithm were tested on a variety of problems. Results of these tests provide indications for effective use of the algorithm.
The development of biological systematics : Antoine-Laurent de Jussieu, nature, and the natural system
A reevaluation of the history of biological systematics that discusses the formative years of the so-called natural system of classification in the eighteenth and nineteenth centuries. Shows how classifications came to be treated as conventions; systematic practice was not linked to clearly articulated theory; there was general confusion over the "shape" of nature; botany, elements of natural history, and systematics were conflated; and systematics took a position near the bottom of the hierarchy of sciences.