# Monthly Archives: January 2015

## Peirce’s 1880 “Algebra Of Logic” Chapter 3 • Preliminaries

Recurring questions about relations, especially triadic relations and sign relations, prompt a return to Peirce’s core papers on the logic of relative terms and the mathematics of relations in general.  I began a study of his Peirce’s 1870 “Logic of … Continue reading

## Animated Logical Graphs • 5

Re: Peirce List Discussion • HP A computational problem is defined as a set of problem instances with specified properties.  An algorithm solves a problem if it computes the correct answer to every problem instance in that set. The use … Continue reading

## Animated Logical Graphs • 4

Re: Peirce List Discussion • HR Although it’s fair to say that most of my university coursework leaned to the theoretical side of things, I did cobble together a respectable enough background in computing, statistics, and industrial-organizational styles of systems … Continue reading

## Animated Logical Graphs • 3

Re: Peirce List • Helmut Raulien I have a little more leisure now to start climbing back into the saddle, so let me see where we left off … Try looking into the article I linked before: Logical Graphs Or … Continue reading

## Pragmatism About Theoretical Entities • 1

By theoretical entities I mean things like classes, properties, qualities, sets, situations, or states of affairs, in general, the putative denotations of theoretical concepts, formulas, sentences, terms, or treatises, in brief, the ostensible objects of signs. A conventional statement of … Continue reading

## Animated Logical Graphs • 2

Re: Peirce List • Jim Willgoose It’s almost 50 years now since I first encountered the volumes of Peirce’s Collected Papers in the math library at Michigan State, and shortly afterwards a friend called my attention to the entry for … Continue reading

## Animated Logical Graphs • 1

For Your Musement … Here are some animations I made up to illustrate several different styles of proof in an extended topological variant of Peirce’s Alpha Graphs for propositional logic. ☞ Proof Animations See the following article for a full … Continue reading