Category Archives: Duality

Re: Operator Variables in Logical Graphs • 4 We have encountered the question of how to extend our formal calculus to take account of operator variables. In the days when I scribbled my logical graphs on the backs of computer … Continue reading →

Re: Operator Variables in Logical Graphs • 3 Last time we contemplated the penultimately simple algebraic expression as a name for a set of arithmetic expressions, specifically, taking the equal sign in the appropriate sense. Then we asked the corresponding … Continue reading →

And if he is told that something is the way it is, then he thinks:  Well, it could probably just as easily be some other way.  So the sense of possibility might be defined outright as the capacity to think … Continue reading →

Re: Operator Variables in Logical Graphs • 1 Re: Cybernetics List • Lou Kauffman LK: I am writing to comment that there are some quite interesting situations that generalize the De Morgan Duality. One well-known one is this.  Let denote the … Continue reading →

Re: Operator Variables in Logical Graphs • 1 Re: Academia.edu • Stephen Duplantier SD: The best way for me to read Peirce is as if he was writing poetry.  So if his algebra is poetry — I imagine him approving … Continue reading →

Operand Variables In George Spencer Brown’s Laws of Form the relation between the primary arithmetic and the primary algebra is founded on the idea that a variable name appearing as an operand in an algebraic expression indicates the contemplated absence … Continue reading →

In lieu of a field study requirement for my bachelor’s degree I spent two years in various state and university libraries reading everything I could find by and about Peirce, poring most memorably through reels of microfilmed Peirce manuscripts Michigan … Continue reading →