Events Calendar

2021 Fall Colloquium and Teaching Seminar Schedule
September 21 Logic Seminar Kameryn Williams (SHSU)
October 12 Logic Seminar Thomas Brommage (SHSU)
October 19 Logic Seminar Thomas Brommage (SHSU)
October 27 Colloquium Xiyuan Liu (Louisiana Tech University)

Colloquium October 27

Introduction to Machine Learning and Statistical approaches in Classification and Clustering analysis
Xiyuan Liu, Assistant Professor, Louisiana Tech University 

Machine learning plays an essential role in today's era of big data analysis. One of the most important research problems in big data analysis is classifying observations into different groups. There are two approaches to this problem: clustering and classification. The clustering analysis is unsupervised learning, such as Principal Components Analysis, K-Means Clustering, and Hierarchical Clustering. On the other hand, classification is supervised learning, such as Logistic Regression, Linear Discriminant Analysis, and Conditional Random Field. This presentation will briefly introduce some classical approaches and closely introduce Conditional Random Field.

Logic Seminar October 19

Modal Logic Before Kripke, Part II
Thomas Brommage, Lecturer of Philosophy, Sam Houston State University 

In the second part of the talk, I will discuss the developments following C. I. Lewis' development of modal propositional logic.  Discussion will include the minimal normal modal system K, and the Feys-Von Wright systems M (T), Oskar Becker and Kurt Gödel's axiomatization of the system S4, and the “Brouwerian System” B.  I conclude by discussing some of the logical relationships between the various systems and their application to philosophical problems ranging from ethics (deontic logic) to the metaphysics of time (tense logic).

Logic Seminar October 12

Modal Logic Before Kripke, Part I
Thomas Brommage, Lecturer of Philosophy, Sam Houston State University

In the first part of the talk I will begin with discussing the history of modal logic, from its initial development in Aristotle.  Some background on the modal syllogistic logic from the Prior Analytics and the relations between modal propositions from On Interpretation will be discussed, with some attention to the developments through the middle ages.  This background will culminate in understanding the motivations behind the development of C. I. Lewis' system of strict implication—the so-called “paradoxes of material implication”—which motivated the developments of the first systems of modal propositional logic (S1-S5).