REPRESENTATIONS AS MEANS AND ENDS: REPRESENTABILITY AND HABITUATION IN MATHEMATICAL ANALYSIS DURING THE FIRST PART OF THE NINETEENTH CENTURY

Author(s):  
HENRIK KRAGH SØRENSEN
Author(s):  
Renaud Chorlay

This article examines ways of expressing generality and epistemic configurations in which generality issues became intertwined with epistemological topics, such as rigor, or mathematical topics, such as point-set theory. In this regard, three very specific configurations are discussed: the first evolving from Niels Henrik Abel to Karl Weierstrass, the second in Joseph-Louis Lagrange’s treatises on analytic functions, and the third in Emile Borel. Using questions of generality, the article first compares two major treatises on function theory, one by Lagrange and one by Augustin Louis Cauchy. It then explores how some mathematicians adopted the sophisticated point-set theoretic tools provided for by the advocates of rigor to show that, in some way, Lagrange and Cauchy had been right all along. It also introduces the concept of embedded generality for capturing an approach to generality issues that is specific to mathematics.


1983 ◽  
Vol 16 (3) ◽  
pp. 239-259 ◽  
Author(s):  
R. W. Home

Siméon Denis Poisson (1781–1840) was a major figure in French science throughout the first forty years of the nineteenth century. Though his papers lack the brilliant mathematical creativity of some of those published by even more gifted contemporaries such as Joseph Fourier (1768–1830) and Augustin-Louis Cauchy (1789–1857), they nevertheless display a formidable talent for mathematical analysis, applied with great industry and success in a large number of investigations ranging over the whole domain of mathematical physics. Several were of such importance that even on their own they would have sufficed to win him lasting fame.


2018 ◽  
Vol 18 (36) ◽  
pp. 7-17
Author(s):  
Carmen Martínez-Adame

Pathological objects and counterexamples play an important role in mathematical understanding even though there is no precise definition of them.What is a pathological object? What makes a mathematical object pathological?The aim of this paper is to try to give a partial response to these questions from the standpoint of mathematical analysis in the nineteenth and twentieth centuries. We will describe briefly how the notion of function changed dramatically in the nineteenth century and we will study how this change brought on important philosophical consequences for the subject implying that the notion of pathology relies upon certain properties occurring only in a few instances.


1978 ◽  
Vol 24 ◽  
pp. 323-367 ◽  

In 1900 pure mathematics in this country was at a low ebb. Since the days of Newton mathematics had come to be regarded as ancillary to natural philosophy. In the nineteenth century this attitude had been confirmed by the prestige of Stokes, Clerk Maxwell, Kelvin and others. On the continent the nineteenth century was as fruitful in pure mathematics as England was barren. The central property of functions of a complex variable was found by Cauchy, and further light was shed on the theory by Riemann and Weierstrass. France, Germany and Italy had many pure mathematicians of the first rank. The leading British scholars, notably Cayley, had been solitary figures and had not led young men into research. After 1900, the principal architect of an English school of mathematical analysis was G. H. Hardy (1877-1947). In strengthening the foundations and building on them he found a partner in the subject of this memoir, J. E. Littlewood (1885-1977). The inspiration of their personalities, their research and their teaching established by 1930 a school of analysis second to none in the world.


1967 ◽  
Vol 31 ◽  
pp. 313-317 ◽  
Author(s):  
C. C. Lin ◽  
F. H. Shu

Density waves in the nature of those proposed by B. Lindblad are described by detailed mathematical analysis of collective modes in a disk-like stellar system. The treatment is centered around a hypothesis of quasi-stationary spiral structure. We examine (a) the mechanism for the maintenance of this spiral pattern, and (b) its consequences on the observable features of the galaxy.


Author(s):  
Tim Oliver ◽  
Akira Ishihara ◽  
Ken Jacobsen ◽  
Micah Dembo

In order to better understand the distribution of cell traction forces generated by rapidly locomoting cells, we have applied a mathematical analysis to our modified silicone rubber traction assay, based on the plane stress Green’s function of linear elasticity. To achieve this, we made crosslinked silicone rubber films into which we incorporated many more latex beads than previously possible (Figs. 1 and 6), using a modified airbrush. These films could be deformed by fish keratocytes, were virtually drift-free, and showed better than a 90% elastic recovery to micromanipulation (data not shown). Video images of cells locomoting on these films were recorded. From a pair of images representing the undisturbed and stressed states of the film, we recorded the cell’s outline and the associated displacements of bead centroids using Image-1 (Fig. 1). Next, using our own software, a mesh of quadrilaterals was plotted (Fig. 2) to represent the cell outline and to superimpose on the outline a traction density distribution. The net displacement of each bead in the film was calculated from centroid data and displayed with the mesh outline (Fig. 3).


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