LoF24: Louis H Kauffman - Arithmetic in 'Laws of Form'

Spencer-Brown has pointed out that he discovered an arithmetic that underlies Boolean algebra. This arithmetic is the Spencer-Brown Calculus of Indications generated by the mark (here written in typographical form) subject to the relations of calling, =, and crossing, = , where, in crossing, the two marks are erased in the plane of writing. This talk will explore how integer arithmetic can be constructed by adopting different equivalences than the laws of calling and crossing. Spencer-Brown's construction of integer arithmetic is based on keeping only the law of crossing. Then ,,,... can represent the numbers 1,2,3,.... We begin by discussing a more general version of this system where we assign a non-negative integer to each expression in the mark. The key to this point of view is to understand that there are two voids in ordinary arithmetic: the multiplicative void with symbol 1 and the additive void with symbol 0. Spaces in an expression are understood to be either multiplicative spaces or additive spaces. The arithmetical mark connotes a crossing from one type of space to the other. By formulating the concept of ordinary arithmetic in this way, we can construct insightful systems of arithmetic that are related to the form and principles of Laws of Form.  Louis Kauffman has a BS from MIT and PhD from Princeton in Mathematics. He is Professor Emeritus of Mathematics at the University of Illinois at Chicago. His research is in knot theory and its ramifications in other areas of mathematics and science. He is a Fellow of the American Mathematical Society, Editor in Chief of the Journal of Knot Theory and its Ramifications, Recipient of the Warren McCulloch and Norbert Wiener awards of the American Society for Cybernetics, the Bertalanfy Award for Complex Systems, and an ANPA Award of the Alternative Natural Philosophy Association. He works on the mathematics of form and laws of form and writes a column on Virtual Logic for the Journal Cybernetics and Human Knowing, and he is the Editor of the World Scientific Book Series On Knots and Everything. More info: homepages.math.uic.edu/~kauffman