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The College Mathematics Journal is designed to enhance classroom learning and stimulate thinking regarding undergraduate mathematics. CMJ publishes articles, short Classroom Capsules, problems, solutions, media reviews and other pieces. All are aimed at the college mathematics curriculum with emphasis on topics taught in the first two years.

Publisher: Mathematical Association of America

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Volume 42, Number 5, November 2011

Free Content Front Matter
pp. i-iii(3)

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How to Be a Good Teacher Is an Undecidable Problem
pp. 350-354(5)
Author: Flapan, Erica

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One Problem, Nine Student-Produced Proofs
pp. 355-360(6)
Authors: Birky, Geoffrey; Campbell, Connie; Raman, Manya; Sandefur, James; Somers, Kay

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The Easiest Lights Out Games
pp. 361-372(12)
Author: Torrence, Bruce

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Is Parallelism an Equivalence Relation?
pp. 372-372(1)
Author: Liu, Andy

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One-dimensional Czédli-type Islands
pp. 374-378(5)
Authors: Horváth, Eszter K.; Máder, Attila; Tepavčević, Andreja

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Derivative Sign Patterns
pp. 379-382(4)
Author: Clark, Jeffrey

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Limit Interchange and L'Hôpital's Rule
pp. 382-383(2)
Author: Ecker, Michael W.

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Walking with a Slower Friend
pp. 384-387(4)
Authors: Bailey, Herb; Kalman, Dan

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The Cobb-Douglas Function and Hölder's Inequality
pp. 387-389(3)
Author: Goebeler, Jr., Thomas E.

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The Center of Mass of a Soft Spring
pp. 389-394(6)
Authors: Serna, Juan D.; Joshi, Amitabh

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Discretization vs. Rounding Error in Euler's Method
pp. 396-399(4)
Author: Borges, Carlos F.

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Abel's Theorem Simplifies Reduction of Order
pp. 399-402(4)
Author: Green, William R.

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Averaging Sums of Powers of Integers
pp. 402-404(3)
Author: Pfaff, Thomas J.

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Uncountably Generated Ideals of Functions
pp. 404-406(3)
Author: Sury, B.

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Problems and Solutions
pp. 407-412(6)

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Media Highlights
pp. 416-425(10)

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Referees in 2011
pp. 427-429(3)

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Free Content Back Matter
pp. iv-vi(3)

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