Fallacy of the inverse vs.fallacy of the converse. Valid vs. invalid arguments.

Series of interviews with artists and how math is related to the field of arts and humanities (i.e. music, dance, and visual arts)

Geometry History: Euclid to present Uses Practical applications Hairy ball theorem

Cardinality of infinite sets Infinite sets Elements Subsets

What are Numeration Systems? What needs of civilizations were met by numeration systems? Some major ancient civilizations and their numeration systems: - The Egyptian Numeration System - The Babylonian Numeration System - The Mayan Numeration System - The Chinese Numeration System - The Greek Numeration System - The Roman Numeration System - The Hindu-Arabic Numeration System