On the structure of the lattice of noncrossing partitions. - Rodica Simion; Daniel Ullman 001 (Discret. Math., 1991)

On Tensor Powers of Integer Programs. - Robin Pemantle; James Gary Propp; Daniel Ullman 001 (SIAM J. Discret. Math., 1992)

Undirected Edge Geography. - Aviezri S. Fraenkel; Edward R. Scheinerman; Daniel Ullman 001 (Theor. Comput. Sci., 1993)

Sequential Compounds of Combinatorial Games. - Walter Stromquist; Daniel Ullman 001 (Theor. Comput. Sci., 1993)

Fractional isomorphism of graphs. - Motakuri V. Ramana; Edward R. Scheinerman; Daniel Ullman 001 (Discret. Math., 1994)

The fractional chromatic number of mycielski's graphs. - Michael Larsen; James Gary Propp; Daniel Ullman 001 (J. Graph Theory, 1995)

On point-halfspace graphs. - Edward R. Scheinerman; Ann N. Trenk; Daniel Ullman 001 (J. Graph Theory, 1995)

Girth and fractional chromatic number of planar graphs. - Amir Pirnazar; Daniel H. Ullman (J. Graph Theory, 2002)

Review: Math on Trial: How Mathematics Is Used and Abused in the Courtroom. By Leila Schneps and Coralie Colmez, Basic Books, New York, 2013, xi+256 pp., ISBN 978-0-465-03292-1, $26.99. - Daniel Ullman 001 (Am. Math. Mon., 2014)

Problems and Solutions. - Gerald A. Edgar; Daniel H. Ullman; Douglas B. West (Am. Math. Mon., 2018)

The Seventy-Eighth William Lowell Putnam Mathematical Competition. - Mark Krusemeyer; Daniel H. Ullman (Am. Math. Mon., 2018)

Problems and Solutions. - Gerald A. Edgar; Daniel H. Ullman; Douglas B. West; Paul Bracken (Am. Math. Mon., 2019)

The Seventy-Ninth William Lowell Putnam Mathematical Competition. - Mark Krusemeyer; Daniel H. Ullman (Am. Math. Mon., 2019)

Differences of Bijections. - Daniel H. Ullman; Daniel J. Velleman (Am. Math. Mon., 2019)

The Eightieth William Lowell Putnam Mathematical Competition. - Mark Krusemeyer; Daniel H. Ullman (Am. Math. Mon., 2020)

Problems and Solutions (with the collaboration of Paul Bracken, Ezra A. Brown Zachary Franco Christian Friesen László Lipták Rick Luttmann Frank B. Miles Lenhard Ng Kenneth Stolarsky Richard Stong Stan Wagon Lawrence Washington Elizabeth Wilmer Fuzhen Zhang and Li Zhou). - Daniel H. Ullman; Daniel J. Velleman; Douglas B. West (Am. Math. Mon., 2020)

Problems and Solutions. - Daniel H. Ullman; Daniel J. Velleman; Douglas B. West (Am. Math. Mon., 2020)

The Eighty-First William Lowell Putnam Mathematical Competition. - Mark Krusemeyer; Daniel H. Ullman; Paul Zeitz (Am. Math. Mon., 2021)

Problems and Solutions. - Daniel H. Ullman; Daniel J. Velleman; Stan Wagon (Am. Math. Mon., 2022)

The Eighty-Second William Lowell Putnam Mathematical Competition. - Daniel H. Ullman; Paul Zeitz (Am. Math. Mon., 2022)

The Eighty-Third William Lowell Putnam Mathematical Competition. - Daniel H. Ullman; Paul Zeitz (Am. Math. Mon., 2023)

Problems and Solutions. - Daniel H. Ullman; Daniel J. Velleman; Stan Wagon; Douglas B. West (Am. Math. Mon., 2024)

The Eighty-Fourth William Lowell Putnam Mathematical Competition. - Daniel H. Ullman; Paul Zeitz (Am. Math. Mon., 2024)