EXISTENTIAL GRAPHS AS AN INSTRUMENT OF LOGICAL ANALYSIS: PART I. ALPHA

Boundary Logic and Alpha Existential Graphs

Peirce's Alpha Existential Graphs (AEG) is combined with Spencer Brown's Laws of Form to create an algebraic diagrammatic formalism called boundary logic. First, the intuitive properties of configurations of planar nonoverlapping closed curves are viewed as a pure boundary mathematics, without conventional interpretation. Void representational space provides a featureless substrate for boundary...

The Genesis of Peirce’s Beta Part of Existential Graphs

Our paper concerns issues to do with the emergence of some of the most fundamental ideas in Peirce’s diagrammatic logic, many of them still unpublished. How did he gravitate at the diagrammatic approach to logic? It is best to frame this question by asking more precisely: How did he arrive at the full-fledged diagrammatic quantification, the theory that corresponds – or has been claimed to corr...

An Embedding of Existential Graphs into Concept Graphs with Negations

an infinite planar array of rectangular microstrip patch antenna analysis

the methods which are used to analyze microstrip antennas, are divited into three categories: empirical methods, semi-empirical methods and full-wave analysis. empirical and semi-empirical methods are generally based on some fundamental simplifying assumptions about quality of surface current distribution and substrate thickness. thses simplificatioms cause low accuracy in field evaluation. ful...

From Existential Graphs to Conceptual Graphs

Existential graphs (EGs) are a simple, readable, and expressive graphic notation for logic. Conceptual graphs (CGs) combine a logical foundation based on EGs with features of the semantic networks used in artificial intelligence and computational linguistics. CG design principles address logical, linguistic, and cognitive requirements: a formal semantics defined by the ISO standard for Common L...