Ruth Favro passed away on December 8, 2023, at the age of 85. She was a professor emerita at Lawrence Technological University (MI) and a member of the MAA for 43 years. Favro was very active in the MAA, especially the Michigan section. She was chairperson of the section in 2001-02 and the representative to the MAA Board of Governors for 2004-07. Favro was deeply involved in mathematics competitions, directing the Michigan Math Prize Competition from 1991 to 1994, and coaching top students in that competition to represent the state in the American Regions Mathematics League (ARML). Nationally, her MAA activities included work on the AWM-MAA Joint Committee on the Etta Z. Falconer Lecture and the Committee on the Participation of Women. For all of these contributions and more, Favro received the Michigan section’s Distinguished Service Award in 2010, the national MAA Meritorious Service Award in 2012, and the Samuel L. Geitzer Distinguished Coach award from ARML in 2015. Her care for others in the mathematics community is reflected in a retrospective from Lawrence Tech (published a few weeks before her passing) and her obituary.

Louis Brickman passed away on December 2, 2023, at the age of 92. He was math professor emeritus at University at Albany. Brickman was a member of the MAA for 69 years! More information about his life can be found in his obituary.

Richard (Dick) Gibbs passed away on November 24, 2023, at the age of 81. He was a Professor of Mathematics Emeritus at Fort Lewis College (CO) and a life member of the MAA, maintaining membership for 55 years. In the 1990’s, Gibbs was chairman of the MAA’s Committee on the American Mathematics Competitions, and in 2002 he received the Meritorious Service Award from the MAA’s Rocky Mountain Section. Among his contributions to encourage participation in mathematics, Gibbs was the co-founder of the Colorado Math Awards to recognize outstanding young students. More information about his life and career can be found in a 2008 interview by Kenneth A. Ross and his obituary.

Jean-Pierre Ehrmann passed away on November 14, 2023, at the age of 72. A member of the MAA for 16 years, he made notable contributions to the study of classical geometry. Ehrmann lived in Clichy, France, and does not appear to have been associated with any college or university.

Ira Ewen passed away on October 26, 2023, at the age of 92. He was a life member of the MAA, maintaining membership for 43 years. Ewen was a mathematics teacher and administrator in the New York Public School system during his career, serving ultimately as the Head of Mathematics/Innovation for the school system before his retirement. His legacy of students who went on to achieve at the highest levels was described in an extensive MAA Math Values column in 2022. He was also a leading light in the New York bridge community. More information about his life and career can be found in his obituary.

Vic Levine passed away on October 18, 2023, at the age of 75. He was a mathematics teacher at Madison Memorial High School in Wisconsin (now renamed Vel Phillps Memorial High School) until he retired and was a member of the MAA for 35 years. In 1999, he was a recipient of the MAA’s Edyth May Sliffe Award for Distinguished Mathematics Teaching in Middle School and High School. Levine was also a reader, table leader, and question leader for the AP calculus exams for many years. More information about his life and career can be found in an article focusing on his successful work as a hockey coach, and his obituary.

Edwin O'Shea passed away on September 26, 2023, at the age of 45. He was an associate professor at James Madison University and a member of the MAA for 10 years. For the MAA, O’Shea was on the editorial board for Mathematics Magazine, and he published in the Magazine, in Math Horizons, and the MAA Found Math gallery. More information about his life and career is available in his obituary.

Robert Spann passed away on September 12, 2023, at the age of 76. A generous donor to the MAA, he was a member for 19 years. Spann was an economist who taught early in his career at Virginia Tech and then worked as a consultant for most of his career, including serving as a vice president of Charles River Associates. More information about his life and career can be found in his obituary.

Stephen Rodi passed away on September 11, 2023, at the age of 82. A member of the MAA for 37 years, he taught at Austin Community College from 1976 until his retirement in 2017, serving for several years as the department chairman. Rodi was very active in the mathematics community, especially AMATYC, serving as its president in the 1980’s. As noted in this significant review of his career, Rodi “was instrumental in AMATYC becoming recognized by national agencies and professional societies as the leading organization that represents the mathematics taught in the first two years of college.” In 1992, he received the AMATYC Mathematics Excellence Award. For the MAA, Rodi was active in the American Mathematics Competitions, and he received the MAA’s Lester R. Ford award in 2010 as co-author of a paper on Euler’s Theorem. AMATYC has available a recorded interview with Rodi, and more information about his life and career can be found in his obituary.

Larry Knop passed away on September 9, 2023, at the age of 82. Knop was Professor of Mathematics and Statistics Emeritus at Hamilton College (NY) and a member of the MAA for 46 years. While Knop retired officially in 2013, he continued to teach as part of the Mohawk Consortium College in Prison Program. More information about his life and career can be found in this remembrance from Hamilton College and his obituary.

Nadine Verderber passed away on September 7, 2023, at the age of 83. She was a generous donor to the MAA and a retired Professor of Mathematics at Southern Illinois University. More information about her life and career can be found in her obituary.

William Young passed away on August 24, 2023, at the age of 75. He was a member of the MAA for 51 years.

Eric Nordgren passed away on August 16, 2023, at the age of 90. A member of the MAA for 64 years, Nordgren was a full professor at the University of New Hampshire until he retired in 2008. Along with a photograph from 1964 from the Paul Halmos collection, more information about Nordgren’s life and career can be found in his obituary.

Calvin C. Moore passed away on July 26, 2023, at the age of 86. He was Professor Emeritus at UC Berkeley and a member of the MAA for 49 years. Moore was well known for his work in the theory of operator algebras and topological groups, summarized in an overview by Roger Howe. He co-founded the Simons Laufer Mathematical Sciences Institute (formerly the Mathematical Sciences Research Institute (MSRI)) at Berkeley in 1982, and he wrote a notable history of mathematics at Berkeley in 2007. More information about Moore’s career can be found on his Wikipedia page.

Edward Thurber passed away on July 9, 2023, at the age of 82. He was Professor Emeritus at Biola University and a member of the MAA for 48 years. More information about his life and career can be found in his obituary.

Jerome Minkus passed away in June 2023, at the age of 87. He was a member of the MAA for 21 years. Minkus published an article in the Memoirs of the American Mathematical Society.

John D. Fulton passed away on May 30, 2023, at the age of 85. A member of the MAA for 59 years, Fulton spent much of his career at Clemson University, including serving as Department Chair. He also was a dean at the University of West Florida and the University of Missouri, Rolla, and a Senior Vice Provost at Virginia Tech. For the MAA, he served on several committees, including the Science Policy Committee and the AMS-MAA Joint Committee on Mathematicians with Disabilities. More information about his life and career can be found in his obituary.

Robert Zimmer passed away on May 23, 2023, at the age of 75. Zimmer is best known for serving as the president of the University of Chicago from 2006 to 2021, where he was best known for his advocacy for freedom of expression in higher education. As a mathematician, Zimmer was the author of two books and more than 80 research articles, specializing in geometry, particularly in ergodic theory and Lie theory. Significantly more information about his life and career can be found in a remembrance from the University of Chicago, an article from Brown University, and his Wikipedia page.

Jim Vandergriff passed away on May 4, 2023, at the age of 76. He was Professor Emeritus at Austin Peay State University and a member of the MAA for 31 years. Vandergriff received the MAA’s Southeastern Section’s Distinguished Service Award in 2013, and he coached several teams of students in MAA competitions. More information about his life and career can be found in his obituary.

Dorothy Wolf passed away on April 5, 2023. She was a member of the MAA for 68 years and lived to the age of 102! Wolfe was Professor Emerita at Widener University, retiring in 1985. More information about her life and career can be found in her obituary.

Gerhard H. Bold was a member of the MAA for 18 years, and his death was reported to the MAA in April 2023. Bold was born in April 1944 and lived in Pennsylvania.

Tom Osler passed away on March 26, 2023, at the age of 82. He was a full professor at Rowan University until his death and a member of the MAA for 52 years. Osler was known in mathematics for his contributions to fractional calculus. He was also a national champion in distance running and a member of the Road Runners Club of America Hall of Fame. His career was celebrated at “Oslerfest” in 2010, and he received the Award for Distinguished College or University Teaching of Mathematics from the New Jersey Section of the MAA in 2009. More information about his life and career can be found in a 2009 article from Rowan University, an interview from that year regarding his running career, his Wikipedia page, a retrospective in the Philadelphia Inquirer, and the guest book from the funeral home.

Lieven Vanhecke passed away on March 11, 2023, at the age of 83. He was Emeritus Full Professor at Katholieke Universiteit Leuven (Belgium) and a member of the MAA for 51 years. Vanhecke was well-known for his contributions to differential geometry and topology, and a photograph from 1981 is available.

Seymour Haber was a member of the MAA for 24 years, and his death was reported to the MAA in March 2023. Haber, born in 1929, was professor emeritus at Temple University. Earlier in his career, he worked for the National Bureau of Standards for over two decades. Brief information about his life and career is available.

Marla Mastin passed away on February 28, 2023, at the age of 81. She was an Early Childhood Mathematics Methodology Professor at Minnesota State University, Mankato until her retirement in 2010 and a member of the MAA for 21 years. More information about Mastin’s life and career can be found in her obituary.

Hobert Henry Corley passed away on February 25, 2023, at the age of 72. A member of the MAA for 50 years, Corley worked as a mathematics teacher at several schools in West Virginia throughout his career, as well as West Virginia Wesleyan College. More information about his life can be found in his obituary.

Theresa Michnowicz passed away on February 24, 2023, at the age of 88. She retired from New Jersey City University as Professor Emerita of Mathematics in 2017 and was a member of the MAA for 58 years. Michnowicz was awarded the Sr. Stephanie Sloyan MAA New Jersey Section Award for Distinguished Service in 2006 for her work for the New Jersey section, including serving as chair of the section for two years. She also received the MAA Certificate of Meritorious Service in 1995. More information about her life and career can be found in her obituary.

Carroll F. Blakemore passed away on February 20, 2023, at the age of 82. He was professor emeritus at the University of New Orleans (retired in 2012) and a member of the MAA for 57 years. Blakemore served as Mathematics Department Chair from 1986-1991 and again from 2000-2008, the latter period included the difficulties of Hurricane Katrina. More information about his life and career can be found in his obituary.

Solomon L. Willis passed away unexpectedly on February 20, 2023, at the age of 45. He was the Mathematics and Education Department Chair at Cleveland Community College and a member of the MAA for 12 years. Along with postings of condolences, more information about his life and career can be found in his obituary.

Maurice Frank passed away on February 13, 2023, at the age of 80. He was a Professor Emeritus of Applied Mathematics at Illinois Tech and a member of the MAA for 52 years. More information about his life and career can be found in his obituary.

David Singmaster passed away on February 13, 2023, at the age of 84. He was emeritus professor of mathematics at London South Bank University, England and a member of the MAA for 54 years. Singmaster was a pioneer of recreational mathematics, coming to international prominence for his book on the mathematical solution to the Rubik’s Cube in the early 1980’s. Among his other publications, he was the co-author of a translation of “Problems to Sharpen the Young” in 1992. Much more information about Singmaster’s life and career can be found in a remembrance from Rob Eastaway, reflections from members of the Gathering4Gardner group, and his Wikipedia page.

Karen Keene passed away on February 12, 2023, at the age of 68. She was a member of the MAA for 12 years. Keene was a well-known and active member of the Research in Undergraduate Mathematics Education community, including the MAA SIGMAA on RUME. Faculty appointments included a position at North Carolina State University and department chair at Embry-Riddle Aeronautical University. Keene was also a rotating program officer at the National Science Foundation. More information about her life and career can be found in her obituary.

Tanya Leise passed away on January 18, 2023, at the age of 51. She was the Brian E. Boyle Professor of Mathematics and Computer Science at Amherst College and a member of the MAA for 22 years. Leise was an applied mathematician whose work focused on biomathematics, and she was known for her 2006 article (with Kurt Bryan) on the linear algebra foundation of Google’s search engine. For the MAA, Leise served on the Joint Committee on Women, the College Mathematics Journal editorial board, and the committee for the Halmos and Ford awards, among others. More information about her life and career can be found in this remembrance from Amherst and her Wikipedia page.

Martin Davis passed away on January 1, 2023, at the age of 94. He was an emeritus professor at New York University since retiring in 1996 and a member of the MAA for 35 years. Davis was an eminent logician known for his trailblazing work in the areas of computational complexity theory, recursive function theory, and mathematical logic. In particular, he is credited as one of the solvers of Hilbert’s 10th problem. In acknowledgement of his outstanding contributions, Davis was awarded the Leroy P. Steele Prize, the MAA’s Chauvenet Prize, and the MAA’s Lester R. Ford Award. He was also the author of several well-received books in computing and logic, including Engines of Logic: Mathematicians and the Origin of the Computer. Remembrances and considerable other information about his life and career can be found in commentary from Bill Gasarch, a memoriam with photographs from his son Harold, an obituary in the IEEE Annals of the History of Computing, an article from the University of California, Berkeley, and his Wikipedia page. In addition, in honor of his career in computing theory, ChatGPT was utilized to write an obituary.