H. G. Wells and B. F. Skinner on the superorganism

A daughter's retrospective of B. F. Skinner.

This paper describes characteristic behaviors of my father, B. F. Skinner, using family documents and my own recollections. Early contingencies in his upbringing strengthened his love of building things and his independence in discovering how the world works. Those skills, combined with a lack of supervision in graduate school, set the stage for his discovery of the operant. He did not stop wit...

Computing B-Orbits on G/H

The orbits of a Borel subgroup acting on a symmetric variety G/H occur in several areas of mathematics. For example, these orbits and their closures are essential in the study of Harish Chandra modules (see [Vog83]). There are several descriptions of these orbits, but in practice it is actually very difficult and cumbersome to compute the orbits and their closures. Since the characterizations o...

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f-DERIVATIONS AND (f; g)-DERIVATIONS OF MV -ALGEBRAS

Recently, the algebraic theory of MV -algebras is intensively studied. In this paper, we extend the concept of derivation of $MV$-algebras and we give someillustrative examples. Moreover, as a generalization of derivations of $MV$ -algebraswe introduce the notion of $f$-derivations and $(f; g)$-derivations of $MV$-algebras.Also, we investigate some properties of them.

Early writings on science and science fiction by H. G. Wells

ROBERT PHILMUS and DAVID Y. HUGHES (editors), Early writings on science and science fiction by H. G. Wells, Berkeley, Los Angeles, and London, University of California Press, 1975, 8vo, pp. xiv, 249, £10.00. The editors' purpose is to bring together twenty-eight essays from H. G. Wells' hitherto unreprinted writings of the 1880s and 1890s, which are concerned with science and science fiction. T...