The American Mathematical Monthly, Volume 114

Volume 114, Number 1, January 2007

• 
  Peter Maier, Werner Nickel:
  Attainable Patterns in Alien Tiles. 1-13
• 
  Tanya Leise, Andrew Cohen:
  Nonlinear Oscillators at Our Fingertips. 14-28
• 
  Dave Auckly:
  Solving the Quartic with a Pencil. 29-39
• 
  Donatella Merlini, Renzo Sprugnoli, M. Cecilia Verri:
  The Method of Coefficients. 40-57

Notes

• 
  William F. Ford, James A. Pennline:
  When Does Convergence in the Mean Imply Uniform Convergence? 58-60
• 
  Sime Ungar:
  The Koch Curve: A Geometric Proof. 61-66
• 
  Dong-Soo Kim, Young Ho Kim:
  A Characterization of Ellipses. 66-70
• 
  Jonathan M. Borwein:
  A Class of Dirichlet Series Integrals. 70-76

Problems and Solutions

• 
  Donald E. Knuth:
  Problem 11264. 77
• 
  Steve Butler, Jia Mao:
  Problem 11265. 77
• 
  Marian Tetiva:
  Problem 11266. 77
• 
  Eugene A. Herman:
  Problem 11267. 77
• 
  M. L. Glasser:
  Problem 11268. 78
• 
  Hervé Moulin:
  Problem 11269. 78
• 
  Sergey Sadov:
  Problem 11270. 78

Solutions

• 
  David Beckwith:
  An Accidental Repetition of the All-Ones Problem: 10851. 78-79
• 
  Tom M. Apostol, et al.:
  Summing the Initial Inverted Powers: 11128. 79-80
• 
  M. L. Glasser, Richard Stong:
  An Elementary Integral: 11148. 80-81
• 
  Mircea Ivan, Ioan Rasa, M. A. Prasad:
  Limit with Nested Logs: 11149. 81
• 
  Paul Bracken, Michael Goldenberg, Mark Kaplan:
  A Nonlinear Recurrence: 11153. 81-82
• 
  Hillel Gauchman, et al.:
  Square Root Inequality: 11157. 82-83
• 
  Greg Oman, Michael W. Botsko:
  Isomorphic Rings of Functions: 11166. 83
• 
  Mohammad Hossein Mehrabi, O. P. Lossers:
  A Gamma Function Inequality: 11169. 83-84
• 
  Slavko Simic, et al.:
  Maximum Real Part of a Zero of a Polynomial: 11184. 84

Reviews

• 
  Fernando Q. Gouvêa:
  A First Course in Modular Forms by Fred Diamond; Jerry Shurman. 85-90
• 
  Daniel J. Velleman:
  Editor's Endnotes. 91

Volume 114, Number 2, February 2007

• 
  Richard K. Guy:
  The Lighthouse Theorem, Morley & Malfatti: A Budget of Paradoxes. 97-141
• 
  Po-Ru Loh:
  Stepping to Infinity Along Gaussian Primes. 142-151

Notes

• 
  Bau-Sen Du:
  A Simple Proof of Sharkovsky's Theorem Revisited. 152-155
• 
  Gwen Spencer, Francis Edward Su:
  The LSB Theorem Implies the KKM Lemma. 156-159
• 
  Sam B. Nadler Jr., Donna M. Zitney:
  Pointwise Products of Uniformly Continuous Functions on Sets in the Real Line. 160-163

Problems and Solutions

• 
  Iliya Bluskov:
  Problem 11271. 164
• 
  Vasile Mihai:
  Problem 11272. 164
• 
  Marian Tetiva:
  Problem 11273. 164-165
• 
  Donald E. Knuth:
  Problem 11274. 165
• 
  Michael S. Becker:
  Problem 11275. 165
• 
  Eugene A. Herman:
  Problem 11276. 165

Solutions

• 
  Vicentiu D. Radulescu, Richard Stong:
  Exponential Growth of a Solution: 11137. 165-166
• 
  George Lamb, Jan A. Grzesik:
  A Quadrature on a Sphere: 11159. 167
• 
  Paolo Perfetti, et al.:
  Series with Sines: 11162. 167-168
• 
  Vicentiu D. Radulescu, et al.:
  Ginzburg-Landau Energy: 11167. 168-170
• 
  Suat Namli, O. P. Lossers:
  A Functional Equation with Exponential Solutions: 11180. 170-171
• 
  Grahame Bennett, Eugene A. Herman:
  Apply Hölder: 11202. 171

Reviews

• 
  Gerald B. Folland:
  Analysis I: Convergence, Elementary Functions by Roger Godement; Analysis II: Differential and Integral Calculus, Fourier Series, Holomorphic Functions by Roger Godement. 172-176

Volume 114, Number 3, March 2007

• 
  Amy Cohen-Corwin:
  Yueh-Gin Gung and Dr. Charles Y. Hu Award to Lee Lorch for Distinguished Service to Mathematics. 181-182
• 
  Robyn Curtis, Marcel Steiner:
  Configuration Spaces of Planar Pentagons. 183-201
• 
  Katherine Socha:
  Circles in Circles: Creating a Mathematical Model of Surface Water Waves. 202-216
• 
  Anders Claesson, T. Kyle Petersen:
  Conway's Napkin Problem. 217-231
• 
  Dante Manna, Victor H. Moll:
  A Simple Example of a New Class of Landen Transformation. 232-241

Notes

• 
  Michael W. Botsko:
  Exactly Which Bounded Darboux Functions Are Derivatives? 242-246
• 
  Mark Levi:
  Riemann Mapping Theorem by Steepest Descent. 246-251
• 
  David H. Armitage:
  Entire Functions That Tend to Zero on Every Line. 251-256
• 
  Mark A. Pinsky:
  Stirling's Formula via the Poisson Distribution. 256-258

Problems and Solutions

• 
  Prithwijit De:
  Problem 11277. 259
• 
  Slavko Simic:
  Problem 11278. 259
• 
  Vitaly Stakhovsky:
  Problem 11279. 259
• 
  Harris Kwong:
  Problem 11280. 259
• 
  Max A. Alekseyev, Emeric Deutsch:
  Problem 11281. 259
• 
  Dragomir Z. Dkovic, Kaiming Zhao:
  Problem 11282. 260
• 
  John Abbot, Umberto Zannier:
  Problem 11283. 260

Solutions

• 
  Stephen B. Gray, Thomas McMillan, Xiaoshen Wang:
  Stepping to Regularity: 10923. 260-261
• 
  Kent D. Boklan, Michael Avidon:
  Heronian Triangles: 11134. 261-262
• 
  Ernst Schulte-Geers, Karl David:
  An Identity Involving Rooted Forest: 11144. 262-264
• 
  Yongge Tian, Eugene A. Herman:
  Matrix Systems with the Same Sets: 11146. 264
• 
  Emeric Deutsch, O. P. Lossers:
  Peaks in Dyck Paths: 11150. 264-265
• 
  Donald E. Knuth, O. P. Lossers:
  Partitions of a Circular Set: 11151. 265-266
• 
  Kent Holing, Michael Avidon:
  Indivisibility of the Sum of Squares: 11154. 266

Reviews

• 
  John Stillwell:
  God Created the Integers by Stephen Hawking. 267-271

Volume 114, Number 4, April 2007

• 
  Alberto A. Martínez:
  Euler's "Mistake"? The Radical Product Rule in Historical Perspective. 273-285
• 
  Christopher Francese, David Richeson:
  The Flaw in Euler's Proof of His Polyhedral Formula. 286-296
• 
  Gopala Krishna Srinivasan:
  The Gamma Function: An Eclectic Tour. 297-315
• 
  Bennett Chow, David Glickenstein:
  Semidiscrete Geometric Flows of Polygons. 316-328
• 
  Colin Adams, Frank Morgan, John M. Sullivan:
  When Soap Bubbles Collide. 329-337

Notes

• 
  Arthur T. Benjamin, Gregory P. Dresden:
  A Combinatorial Proof of Vandermonde's Determinant. 338-341
• 
  Michael A. Allen:
  Evaluation of Some Improper Integrals Involving Hyperbolic Functions. 341-343
• 
  Robin Pemantle, Carsten Schneider:
  When Is 0.999... Equal to 1? 344-350
• 
  Brendan Foreman:
  Ghys's Theorem and Semi-Osculating Conics of Planar Curves. 351-356
• 
  Gilbert Helmberg:
  An Absolutely Continuous Function in L1 (R) W1, 1 (R). 356-357

Problems and Solutions

• 
  Greg Oman:
  Problem 11284. 358
• 
  Yakub N. Aliyev:
  Problem 11285. 358
• 
  Marc LeBrun, David L. Applegate, Neil J. A. Sloane:
  Problem 11286. 358
• 
  Stephen J. Herschkorn:
  Problem 11287. 359
• 
  Christopher J. Hillar, Troels Windfeldt:
  Problem 11288. 359
• 
  Oleh Faynshteyn:
  Problem 11289. 359
• 
  Cezar Lupu, Tudorel Lupu:
  Problem 11290. 359

Solutions

• 
  Jonathan Sondow, Richard Stong:
  Choice Bounds: 11132. 359-360
• 
  Paul Bracken, Heinz-Jürgen Seiffert:
  An Integral Inequality: 11133. 360-361
• 
  Donald E. Knuth, Roberto Tauraso:
  A Combinatorial Maximum: 11142. 361-362
• 
  Richard P. Stanley, et al.:
  Inverting a Matrix of Striling Numbers: 11156. 362
• 
  Emeric Deutsch, et al.:
  Compositions without Common Factors: 11161. 363
• 
  Michel Bataille, Richard Stong:
  Counting Lattice Quadrilaterals Tangent to an Ellipse: 11163. 363-364
• 
  José Luis Díaz-Barrero, Ulrich Abel, Mircea Ivan:
  A Recurrent Identify: 11164. 364-365

Reviews

• 
  John P. D'Angelo:
  Geometric Function Theory: Explorations in Complex Analysis by Steven G. Krantz. 366-370

Volume 114, Number 5, May 2007

• 
  Yuval Peres, Oded Schramm, Scott Sheffield, David Bruce Wilson:
  Random-Turn Hex and Other Selection Games. 373-387
• 
  Tom M. Apostol, Mamikon A. Mnatsakanian:
  Unwrapping Curves from Cylinders and Cones. 388-416
• 
  Graham Everest, Shaun Stevens, Duncan Tamsett, Thomas Ward:
  Primes Generated by Recurrence Sequences. 417-431

Notes

• 
  J. W. Neuberger:
  The Continuous Newton's Method, Inverse Functions, and Nash-Moser. 432-437
• 
  Anthony Mendes:
  A Note on Alternating Permutations. 437-440
• 
  Michael Kerckhove, Gary Lawlor:
  The Circle and the Cycloid: A Surprising Link. 441-443
• 
  Jack Ohm:
  A Matrix Approach to Zero-Divisors in R[x]. 444-450

Problems and Solutions

• 
  Richard Jerrard, John E. Wetzel:
  Problem 11291. 451
• 
  David Callan:
  Problem 11292. 451
• 
  Sergey Sadov:
  Problem 11293. 451
• 
  John Zucker, Ross C. McPhedran:
  Problem 11294. 452
• 
  Stefano Siboni:
  Problem 11295. 452
• 
  Saïd Amghibech:
  Problem 11296. 452
• 
  Marian Tetiva:
  Problem 11297. 452

Solutions

• 
  Bogdan Nica, Saïd Amghibech:
  Similarities of Euclidean Space: 11124. 452-453
• 
  Alexander Dubinov, Irina Dubinova:
  Closed Form Closure: 11143. 453
• 
  David Beckwith, Harris Kwong:
  Prime Powers Dividing a Factorial: 11158. 453-454
• 
  Marc Chamberland, C. R. Pranesachar:
  Fermat to the Rescue: 11160. 454
• 
  Yogesh More, Robin Chapman:
  The Sum of Catalan Numbers, Modulo 3: 11165. 454-455
• 
  Kent Holing, et al.:
  Properties of Pythagorean Triples: 11168. 455-456
• 
  Emeric Deutsch, Stephen C. Locke:
  Dissecting a Polygon: 11170. 456-457
• 
  Heinz-Jürgen Seiffert:
  Familiar Identities in Disguise: 11172. 457-458

Reviews

• 
  David M. Bressoud:
  Making Transcendence Transparent by B. Burger; Robert Tubbs. 459-461
• 
  Mark Schwartz:
  Conics by Keith Kendig. 461-464

Volume 114, Number 6, June - July 2007

• 
  Brian S. Thomson:
  Rethinking the Elementary Real Analysis Course. 469-490
• 
  Andrew J. Hetzel, Jay S. Liew, Kent E. Morrison:
  The Probability That a Matrix of Integers Is Diagonalizable. 491-499
• 
  Brody Dylan Johnson:
  The Nonholonomy of the Rolling Sphere. 500-508
• 
  Dierk Schleicher:
  Hausdorff Dimension, Its Properties, and Its Surprises. 509-528

Notes

• 
  Ling-Ling Shi, Hao Pan:
  A q-Analogue of Wolstenholme's Harmonic Series Congruence. 529-531
• 
  Jürgen Bliedtner, Peter A. Loeb:
  A Local Maximal Function Simplifying Measure Differentiation. 532-536
• 
  Boris Adamczewski, Yann Bugeaud:
  A Short Proof of the Transcendence of Thue-Morse Continued Fractions. 536-540
• 
  Joseph Bak, Pisheng Ding, Donald Newman:
  Extremal Points, Critical Points, and Saddle Points of Analytic Functions. 540-546

Problems and Solutions

• 
  Jakob Jonsson:
  Problem 11298. 547
• 
  Pablo Fernández Refolio:
  Problem 11299. 547
• 
  Ulrich Abel:
  Problem 11300. 547
• 
  Finbarr Holland:
  Problem 11301. 547
• 
  Horst Alzer:
  Problem 11302. 547
• 
  Mohammad Farrokhi Derakhshandeh Ghouchan:
  Problem 11303. 548
• 
  Teodora-Liliana Radulescu:
  Problem 11304. 548

Solutions

• 
  M. N. Deshpande, J. P. Shiwalkar, et al.:
  Two Heads Are Better than One: 11173. 548-549
• 
  Jon Louis Bentley, Colin L. Mallows, Richard Stong:
  Learning from Experience: 11178. 549-550
• 
  David Beckwith, Li Zhou:
  A Determinant by Möbius Inversion: 11179. 550
• 
  Shahin Amrahov, Nicholas Singer:
  Perfect Powers in an Arithmetic Progression: 11182. 550-551
• 
  David Beckwith, Vadim Ponomarenko, Rob Pratt:
  Building Two Piles of Equal Height: 11183. 551-552
• 
  Rainer Brück, Robin Chapman:
  When Does It Converge: 11185. 552-554
• 
  Li Zhou, Christopher Carl Heckman, Jerry Minkus, et al.:
  Tiling 4-Rowed Rectangles with Dominoes: 11187. 554-556

Reviews

• 
  Susan Jane Colley:
  Introduction to Plane Algebraic Curves by Ernst Kunz; Richard G. Belshoff. 557-561

Volume 114, Number 7, August - September 2007

• 
  Enrique A. González-Velasco:
  James Gregory's Calculus in the "Geometriœ Pars Universalis". 565-576
• 
  Roman Dwilewicz, Ján Minác, Andrew Schultz, John Swallow:
  Hilbert 90 for Biquadratic Extensions. 577-587
• 
  Arno Berger, Theodore P. Hill:
  Newton's Method Obeys Benford's Law. 588-601
• 
  Jin Akiyama:
  Tile-Makers and Semi-Tile-Makers. 602-609
• 
  Byron L. Walden, Lesley A. Ward:
  A Harmonic Measure Interpretation of the Arithmetic-Geometric Mean. 610-622

Notes

• 
  Carlos A. Escudero, Agustí Reventós:
  An Interesting Property of the Evolute. 623-628
• 
  Jack Cook, Jonathan Lovett, Frank Morgan:
  Rotation in a Normed Plane. 628-632
• 
  Arjeh M. Cohen, Donald E. Taylor:
  On a Certain Lie Algebra Defined by a Finite Group. 633-639

Problems and Solutions

• 
  Vahan Mkrtchyan:
  Problem 11305. 640
• 
  Alexandru Rosoiu:
  Problem 11306. 640
• 
  David Callan:
  Problem 11307. 640
• 
  Ovidiu Furdui:
  Problem 11308. 640
• 
  Roman Witula, Damian Slota:
  Problem 11309. 640
• 
  Erwin Just:
  Problem 11310. 641
• 
  Stephen J. Herschkorn:
  Problem 11311. 641

Solutions

• 
  William Calbeck, Richard Stong:
  Another Diophantine Equation: 11175. 641-642
• 
  M. N. Deshpande, et al.:
  An Urn Problem with Labeled and Unlabeled Balls: 11181. 642
• 
  Angelo J. Christino Jr., William C. Waterhouse, et al.:
  A Group of Invertible Matrices: 11186. 642-643
• 
  David Bailey, M. L. Glasser, Richard Stong:
  A Hypergeometric Identity: 11188. 643-645
• 
  Lajos Csete, O. P. Lossers:
  A Quick Inequality: 11189. 645
• 
  José Luis Díaz-Barrero, Julien Grivaux:
  A Polynomial and Its Zeros: 11190. 645-647
• 
  Marian Tetiva:
  A Cyclic AM-GM Inequality: 11193. 647
• 
  Marian Tetiva, Pál Péter Dályay:
  Ratio Circum-to-In-Radius: 11195. 648-649
• 
  Aliyev Yakub, David B. Leep:
  Symmetric Inequality: 11199. 649
• 
  R. A. Strubel, Donald R. Bridges:
  A Zeta Function Quickie: 11219. 649

Reviews

• 
  Stephen A. Fulling:
  Linearity, Symmetry, and Prediction in the Hydrogen Atom by Stephanie Frank Singer. 650-653
• 
  James Fey, Eric Hart, Christian Hirsch, Harold Schoen, Ann E. Watkins, Daniel J. Velleman:
  Editor's Endnotes. 654-661

Volume 114, Number 8, October 2007

• 
  David Benko:
  A New Approach to Hilbert's Third Problem. 665-676
• 
  John H. Jaroma, Kamaliya N. Reddy:
  Classical and Alternative Approaches to the Mersenne and Fermat Numbers. 677-687
• 
  Gábor J. Székely, Maria L. Rizzo:
  The Uncertainty Principle of Game Theory. 688-702
• 
  Harm Derksen, Christian Eggermont, Arno van den Essen:
  Multimagic Squares. 703-713
• 
  Leonard F. Klosinski, Gerald L. Alexanderson, Loren C. Larson:
  The Sixty-Seventh William Lowell Putnam Mathematical Competition. 714-724

Notes

• 
  Peter D. Lax:
  The Cauchy Integral Theorem. 725-727
• 
  Folkmar Bornemann, Thomas Schmelzer:
  Taming a Hydra of Singularities. 727-732
• 
  M. Ram Murty, Nithum Thain:
  Pick's Theorem via Minkowski's Theorem. 732-736
• 
  Fernando Albiac, Nigel J. Kalton:
  A Characterization of Real C(K)-Spaces. 737-743

Problems and Solutions

• 
  David Callan:
  Problem 11312. 744
• 
  Cezar Lupu, Tudorel Lupu:
  Problem 11313. 744
• 
  Yakub N. Aliyev:
  Problem 11314. 744
• 
  Mohammad Farrokhi Derakhshandeh Ghouchan:
  Problem 11315. 744
• 
  Ovidiu Furdui:
  Problem 11316. 745
• 
  Michel Bataille:
  Problem 11317. 745
• 
  Roman Witula, Damian Slota:
  Problem 11318. 745

Solutions

• 
  R. V. Heath, Christian Boyer:
  Better Late than Never: E 496. 745-746
• 
  Folkmar Bornemann, Robert B. Israel:
  A Disguised Radius of Convergence: 11194. 746-747
• 
  Oleg Faynshteyn, Arkady Alt:
  A Crux Inequality: 11197. 747-748
• 
  Joel Zinn, O. P. Lossers:
  Kronecker-Like Convergence: 11200. 748-749
• 
  Michael S. Becker, Zuofeng Shang:
  Cosine Infinite Product: 11210. 749
• 
  Mihály Bencze, Heinz-Jürgen Seiffert:
  More A-G Inequalities: 11211. 749-750
• 
  José Luis Díaz-Barrero, Eugene A. Herman:
  Limit of an Integral: 11225. 750
• 
  Ovidiu Furdui, Michael Avidon:
  A Gamma Limit: 11229. 751

Reviews

• 
  Warren P. Johnson:
  Mathematics and Social Utopias in France: Olinde Rodrigues and His times by Simon Altmann; Eduardo L. Ortiz. 752-758

Volume 114, Number 9, November 2007

• 
  Thomas Callaghan, Peter J. Mucha, Mason A. Porter:
  Random Walker Ranking for NCAA Division I-A Football. 761-777
• 
  John Starrett:
  Solving Differential Equations by Symmetry Groups. 778-792
• 
  Tomasz Bartnicki, Jaroslaw Grytczuk, Hal A. Kierstead, Xuding Zhu:
  The Map-Coloring Game. 793-803

Notes

• 
  Hugh L. Montgomery, Ulrike M. A. Vorhauer:
  Biased Trigonometric Polynomials. 804-809
• 
  Omer Adelman:
  ∑(1/n) = ∞: A Micro-Lesson on Probability and Symmetry. 809-810
• 
  Benjamin A. Lotto:
  Stacked Groups. 811-812
• 
  Brett A. Harrison:
  On the Reducibility of Cyclotomic Polynomials over Finite Fields. 813-818

The Evolution of...

• 
  Marston Morse:
  Topology and Equilibria. 819-834

Problems

• 
  David Beckwith:
  Problem 11319. 835
• 
  Donald E. Knuth:
  Problem 11320. 835
• 
  Christopher J. Hillar:
  Problem 11321. 835
• 
  Jonathan Sondow:
  Problem 11322. 835
• 
  Jody M. Lockhart, William P. Wardlaw:
  Problem 11323. 835
• 
  Martin Kochanski:
  Problem 11324. 836
• 
  Finbarr Holland, Jim Leahy:
  Problem 11325. 836
• 
  José Luis Díaz-Barrero, Pantelimon George Popescu:
  Problem 11326. 836

Solutions

• 
  Pál Péter Dályay, et al.:
  Periodic Composition: 11174. 836-837
• 
  Oleg Faynshteyn, Yan-loi Wong:
  Another Triangle Inequality: 11176. 837-838
• 
  Dorin Marghidanu, Henry Ricardo:
  GM ≤ AM: 11177. 838
• 
  Barthel Wayne Huff, Gregory Keselman:
  Another Urn and Balls Problem: 11191. 838-839
• 
  Brett Stevens, Richard Stong:
  A Sudoku Solution from Orthogonal Latin Squares: 11192. 839-840
• 
  Fuxiang Yu:
  An Old Fermatian Problem: 11203. 840
• 
  Christopher J. Hillar, John H. Lindsey II, Robin Chapman:
  The Trace of the Sum of All Products of Two Matrices: 11204. 840-841
• 
  Li Zhou, Chris Mackeprang, Kellen Myers:
  Coloring Graphs on Sponges: 11208. 842

Reviews

• 
  Edward Nelson:
  18 Unconventional Essays on the Nature of Mathematics by Reuben Hersh. 843-848

Volume 114, Number 10, December 2007

• 
  Volume Information.
• 
  Charles Hadlock:
  Practicing Mathematics in the Public Arena: Challenges and Outcomes in Some Prominent Case Studies. 849-870
• 
  Markku Halmetoja, Pentti Haukkanen, Teuvo Laurinolli, Jorma K. Merikoski, Timo Tossavainen, Ari Virtanen:
  On Direct and Inverse Proportionality. 871-881
• 
  Thomas C. Hales:
  The Jordan Curve Theorem, Formally and Informally. 882-894
• 
  Mark Levi, Serge Tabachnikov:
  The Poncelet Grid and Billiards in Ellipses. 895-908

Notes

• 
  Alain Connes, Don Zagier:
  A Property of Parallelograms Inscribed in Ellipses. 909-914
• 
  Johan Wästlund:
  An Elementary Proof of the Wallis Product Formula for pi. 914-917
• 
  Christopher J. Hillar, Darren L. Rhea:
  Automorphisms of Finite Abelian Groups. 917-923
• 
  António Guedes de Oliveira:
  On the Adjugate of a Matrix. 923-924

Problems and Solutions

• 
  Rick Mabry, Debbie Shepherd:
  Problem 11327. 925
• 
  Dmitris Vartziotis:
  Problem 11328. 925
• 
  Tewodros Amdeberhan, Victor H. Moll:
  Problem 11329. 925
• 
  Marian Tetiva:
  Problem 11330. 925
• 
  Richard Bagby:
  Problem 11331. 926
• 
  Roberto Tauraso:
  Problem 11332. 926
• 
  Pablo Fernández Refolio:
  Problem 11333. 926

Solutions

• 
  Chu Cheng, Marius Stefan:
  A Quadrilateral and Its Circles: 11171. 926-927
• 
  Wu Wei Chao, Pál Péter Dályay:
  A Triangle Inequality: 11205. 928
• 
  Mircea Ivan, Alexandru Lupas, Richard A. Stong:
  A Limit Involving Euler's Constant: 11206. 928-929
• 
  Michael W. Botsko, Robert B. Israel:
  Disguised Cauchy Sequence: 11207. 929-930
• 
  Alexander Dubinov, Irina Dubinova, Knut Dale:
  Can "Closed Form" Involve Lambert? 11209. 930-931
• 
  Michel Bataille, Richard Stong:
  Finding the Greatest Lower Bound: 11217. 931
• 
  Bogdan Nica:
  Reverse Engineering: 11124. 932
• 
  Kent Holing:
  Unsolved No Longer: 11154. 932
• 
  Errata: 11307. 932

Reviews

• 
  Michael Henle:
  Divine Proportions: Rational Trigonometry to Universal Geometry by N. J. Wildberger. 933-937