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Shipman, Barbara A.; Stephenson, Elizabeth R. – PRIMUS, 2022
Point-set topology is among the most abstract branches of mathematics in that it lacks tangible notions of distance, length, magnitude, order, and size. There is no shape, no geometry, no algebra, and no direction. Everything we are used to visualizing is gone. In the teaching and learning of mathematics, this can present a conundrum. Yet, this…
Descriptors: Mathematics Instruction, College Mathematics, Undergraduate Students, Topology
Shipman, Barbara A.; Shipman, Patrick D. – PRIMUS, 2013
We study situations in introductory analysis in which students affirmed false statements as true, despite simple counterexamples that they easily recognized afterwards. The study draws attention to how simple counterexamples can become hidden in plain sight, even in an active learning atmosphere where students proposed simple (as well as more…
Descriptors: College Mathematics, Undergraduate Study, Mathematics Instruction, Misconceptions
Shipman, Barbara A. – PRIMUS, 2013
Traditional definitions, language, and visualizations of convergence and the Cauchy property of sequences convey a sense of the sequence as a potentially infinite process rather than an actually infinite object. This has a deep-rooted influence on how we think about and teach concepts on sequences, particularly in undergraduate calculus and…
Descriptors: College Mathematics, Mathematics Instruction, Mathematical Concepts, Undergraduate Study
Shipman, Barbara A. – PRIMUS, 2012
Differences in definitions of limit and continuity of functions as treated in courses on calculus and in rigorous undergraduate analysis yield contradictory outcomes and unexpected language. There are results about limits in calculus that are false by the definitions of analysis, functions not continuous by one definition and continuous by…
Descriptors: Comparative Analysis, Calculus, Mathematics Instruction, Undergraduate Study