This is a preview. Log in through your library . Abstract The work described in this article was based on a historical perspective in order to analyze the extension of the natural-number domain to the ...

The summer homework assignment is due on paper on the first day of class. All work must be clearly shown. The examples in the textbook are good models to follow. Do your homework as follows: Use ...

A mathematical proof is a sequence of statements that follow on logically from each other that shows that something is always true. Using letters to stand for numbers means that we can make statements ...

PNAS is the world's most-cited multidisciplinary scientific serial. It publishes high-impact research reports, commentaries, perspectives, reviews, colloquium papers, and actions of the Academy. In ...