The Memorial Tribute to the Great Hani Mahmassani at INFORMS

All those who had the pleasure of knowing Hani Mahmassani, who passed away on July 15, 2025 at the age of 69, will never forget him. He has left us with an incredible void, but lucky are we who were his friends, and/or his students,  and/or colleagues, or collaborators.

Many thanks to Yue Wang of the University of Arizona, who prepared this poster notice for the  Transportation Science and Logistics (TSL) Society memorial tribute event in honor of Hani Mahmassani that took place last week at the INFORMS Conference in Atlanta.

The session began with a Zoom presentation by Roberto Roberti of Italy, this year's recipient of the Stella Dafermos Mid-Career Award, and then it was time for our panel, which was chaired by Karen Smilowitz of Northwestern University, a colleague of Hani's.

At the beginning, we gathered for a photo with Pat Mokhtarian, of Georgia Tech, who joined us. Pat was elected to the National Academy of Engineering, as Hani had been earlier.

Srinivas Peeta of Georgia Tech had prepared the nice collage poster of photos that some of us had also contributed to.

The talks were incredibly touching with Srinivas Peeta speaking about Hani, as his PhD advisor, and colleague, with numerous photos over the years of many luminaries in transportation science. He emphasized what a great researcher Hani was and also an outstanding organizer, integrator, and mentor. 

In my presentation, which is available here:  https://supernet.isenberg.umass.edu/visuals/Hani-Tribute-INFORMS-Nagurney.pdf, I included photos taken over many years of activities, including service ones, I had engaged in with Hani. So many memories came flooding back and I can hear his voice. Hani always inspired us to reach higher and to do more. He stretched us professionally and personally with his many kindnesses and support.

Marco Nie, a colleague of Hani's at Northwestern, had used ChatGPT for his presentation slides, and it was fascinating to see what was picked up by AI in terms of the contributions of Hani's research to transportation science, such as his work on bounded rationality and traffic assignment, and dynamic traffic network equilibrium.

Mike Hyland of UC Irvine, and a former PhD student of Hani's, spoke from the heart about how it was to work with Hani, who only slept a few hours a night. Hani was always willing to listen and to push the frontiers of transportation research and practice. He supervised over 75 PhD theses. 

We then took the group photo below. Thanks to all who were able to join us for this touching memorial session in honor of Hani Mahmassani. 

Thank you, Hani, for your friendship, scholarship, leadership, and for being a visionary.

For the In Memoriam, co-authored by Karen Smilowitz and Marco Nie, and published in the journal Transportation Science, see here: https://pubsonline.informs.org/doi/10.1287/trsc.2025.memorial.v59.n6

The In Memoriam ends as follows: "In 1997, Hani wrote a tribute to Robert Herman in Transportation Science. He closed his tribute with the following words that ring so true to us as we remember Hani: “I will miss him, and so will many others, but will always know that I am a richer person for having known him.”"

Our In Memoriam for Dr. Marguerite Frank Is Now Published and Open Access!

The daughters of Dr. Marguerite Straus Frank informed me over the recent holiday season that she had passed away at the age of 97 on December 11, 2024 in Palo Alto.

I quickly notified Professor Immanuel M. Bomze, the Editor in Chief of the EURO Journal on Computational Optimization (EJCO), of this sad news and he then asked me to partner with him in composing an In Memoriam for Marguerite for EJCO.

Marguerite had been a friend and I even had a photo of her in my presentation on the panel, "What Our Past Can Tell Us About Our Future," that took place at the INFORMS Seattle meeting in October, and that I had written about; see https://annanagurney.blogspot.com/2024/11/many-thanks-to-informs-history.html

Despite it being the holiday period, Immanuel and I managed to write the In Memoriam and it did take a lot of research to ensure accuracy. We were in communications with her daughters: Dr. Claudine Frank and Dr. Isabelle Frank. Since Marguerite and I shared some common research interests, writing the In Memoriam brought back many memories, including when she visited me at the Isenberg School and when I hosted her talk at MIT, when I held an NSF Visiting Professorship for Women there. 

We completed the In Memoriam, but the publisher had "technical difficulty," and it took almost 3 weeks to receive the galleys.  Luckily, it was quickly published online. Plus, the In Memoriam is open access.

You may read and download it here: https://www.sciencedirect.com/science/article/pii/S2192440625000012?via%3Dihub

We shared the In Memoriam with the daughters and they were very appreciative.

Marguerite is best known for being the co-developer of the Frank-Wolfe (1956) algorithm. She faced challenges as a female in STEM but left a lasting legacy. I enjoyed our discussions on the Braess Paradox, which was even a theme in my doctoral dissertation at Brown University.

I am also very grateful to Immanuel Bomze for spearheading an annual paper prize in his journal named after Marguerite. As he wrote to her daughters: "We will keep the memory alive, also with the help of the annual EJCO Award."  More info can be found in the In Memoriam.