This page contains a list of my publications (exclusive of puzzles in puzzle hunts, which appear on my puzzles page).
A solution I submitted for Problem 12137 "There are no 3-Regular Polyominos" was published in the AMM's Problems and Solutions column in the April 2021 issue on pages 381-384. Daniel H. Ullman, Daniel J. Velleman, Douglas B. West & with the collaboration of Paul Bracken, Ezra A. Brown, Zachary Franco, László Lipták, Rick Luttmann, Hosam Mahmoud, Frank B. Miles, Lenhard Ng, Kenneth Stolarsky, Richard Stong, Stan Wagon, Lawrence Washington, and Li Zhou. (2021) PROBLEMS AND SOLUTIONS, The American Mathematical Monthly, 128:4, 376-384, DOI: 10.1080/00029890.2021.1877020
Problem 12309 "Eliminating Tiles" that I coauthored with Thomas C. Occhipinti and Daniel J. Velleman was printed in the AMM's Problems and Solutions column in the March 2022 issue on page 286. Edited by Daniel H. Ullman, Daniel J. Velleman, Stan Wagon & with the collaboration of Paul Bracken, Ezra A. Brown, Zachary Franco, George Gilbert, László Lipták, Rick Luttmann, Hosam Mahmoud, Frank B. Miles, Lenhard Ng, Rajesh Pereira, Kenneth Stolarsky, Richard Stong, Lawrence Washington, and Li Zhou. (2022) Problems and Solutions, The American Mathematical Monthly, 129:3, 285-294, DOI: 10.1080/00029890.2022.2018241
The solution appears in the December 2023 issue on pages 959-960. Edited by Daniel H. Ullman, Daniel J. Velleman, Stan Wagon & Douglas B. West (2023) Problems and Solutions, The American Mathematical Monthly, 130:10, 952-962, DOI: 10.1080/00029890.2023.2252314
This problem won the inaugural Mohammad K. Azarian award for math problem writing in 2025.
All Geared Up (which you can find over on my puzzles page) was reprinted with my permission in The Book of Vile Math by Douglas Strain, 2023.