Cassirer and the Structural Turn in Modern Geometry

Georg Schiemer
2018 Journal for the History of Analytical Philosophy  
The paper investigates Ernst Cassirer's structuralist account of geometrical knowledge developed in his Substanzbegriff und Funktionsbegriff (1910). The aim here is twofold. First, to give a closer study of several developments in projective geometry that form the direct background for Cassirer's philosophical remarks on geometrical concept formation. Specifically, the paper will survey different attempts to justify the principle of duality in projective geometry as well as Felix Klein's
more » ... ization of the use of geometrical transformations in his Erlangen program. The second aim is to analyze the specific character of Cassirer's geometrical structuralism formulated in 1910 as well as in subsequent writings. As will be argued, his account of modern geometry is best described as a "methodological structuralism", that is, as a view mainly concerned with the role of structural methods in modern mathematical practice.
doi:10.15173/jhap.v6i3.3439 fatcat:gxzs5p5jejd5bnmj5ufrovd5uy