New Faculty: Sedi Bartz

This fall we are welcoming Dr. Sedi Bartz to the Department of Mathematical Sciences. Dr. Bartz’ research focuses on topics of nonlinear analysis and variational analysis. He develops refinements of abstract convex analysis, and in turn, transforms his refinements into a unifying language for phenomena in variational analysis which used to be considered quite apart. Dr. Bartz is also a specialist in classical convex analysis and monotone operator theory, theories which are among the most popular tools of modern optimization.

Dr. Bartz holds a Ph.D. from The Technion-Israel Institute of Technology. He arrives to UML after a 3 year term as a Post-Doctoral Fellow at the University of British Columbia, Kelowna, Canada.

New Faculty: Nilabja Guha

This fall, we are happy to welcome Dr. Nilabja Guha to the Department of Mathematical Sciences. Dr. Guha is a statistician who was at Texas A&M University in a postdoctoral position prior to joining UML. He received his doctoral degree in statistics from the University of Maryland Baltimore County where his adviser was Dr Anindya Roy.

Dr Guha’s research interest include Bayesian Modeling, Inverse problems, Uncertainty Quantification, High-dimensional Problems and Graphical Modeling.

Some of his recent publications are

  • Guha, Nilabja, Anindya Roy, Yaakov Malinovsky, and Gauri Datta., 2016. An optimal shrinkage factor in prediction of ordered random effects. Statistica Sinica 26: 1709-1728.
  • Guha, N. and Tan, X., 2017. Multilevel approximate Bayesian approaches for flows in highly heterogeneous porous media and their applications. Journal of Computational and Applied Mathematics, 317, pp.700-717.
  • Yang, K., Guha, N., Efendiev, Y. and Mallick, B.K., 2017. Bayesian and variational Bayesian approaches for flows in heterogeneous random media. Journal of Computational Physics, 345, pp.275-293.

The River Hawk Prime

At first glance the 1680 digit number


would not appear to be remarkable, other than in the preponderance of 1’s and 9’s that comprise its digits. However, there are two interesting observations about this number. First, it is prime. The only integers that divide evenly into it are 1 and itself. Second, if the digits are arranged in a rectangular fashion, 60 digits to a row, we see why it has been dubbed the “River Hawk Prime.”

Cho and Schille recognized for outstanding teaching

The winners of the 2017 Teaching Excellence Awards in Mathematical Sciences are Min Hyung Cho and Theresa Schille.

Min Hyung Cho


Min Hyung Cho (Ph. D.  UNC Charlotte 2005)  is completing his second year at UML. He teaches a variety of graduate and undergraduate courses. His research focuses on developing fast computational algorithms for wave scattering such as Maxwell’s equations and Helmholtz equation.



Theresa Schille

Theresa Schille (B. S. UMass Lowell, 1992, M. S. UMass Lowell 1994) is completing her sixth year as a Lecturer in the Mathematical Sciences.  She has taught calculus and precalculus courses in the day, evening and industrial settings.

Congratulations to both Min Hyung and Theresa on this well-deserved honor!


Prof. Enrique González-Velasco completes work the definitive work on on John Napier

Mathematical Science Professor Enrique González-Velasco recently completed  a book on the life and works of 16th-17th century Scottish mathematician John Napier.  The Life and Works of John Napier, co-authored with a descendant of Napier and an authority on Napier’s life, Prof. González-Velasco has made all of Napier’s mathematical works available in English for the first time.

From the the publisher’s description:

The Life and Works of John Napier, 1st ed. 2017 Edition by Brian Rice, Enrique González-Velasco, Alexander Corrigan, Springer; 1st ed. 2017 edition, ISBN: 978-3319532813.


For the first time, all five of John Napier’s works have been brought together in English in a single volume, making them more accessible than ever before. His four mathematical works were originally published in Latin: two in his lifetime (1550–1617), one shortly after he died, and one over 200 years later. The authors have prepared three introductory chapters, one covering Napier himself, one his mathematical works, and one his religious work. The former has been prepared by one of Napier’s descendants and contains many new findings about Napier’s life to provide the most complete biography of this enigmatic character, whose reputation has previously been overshadowed by rumour and speculation. The latter has been written by an academic who was awarded a PhD for his thesis on Napier at the University of Edinburgh, and it provides the most lucid and coherent coverage available of this abstruse and little understood work. The chapter on Napier’s mathematical texts has been authored by an experienced and respected academic, whose recent works have specialised in the history of mathematics and whose Journey through Mathematics was selected in March of 2012 as an Outstanding Title in Mathematics by Choice magazine, a publication of the American Library Association. All three authors have revisited the primary sources extensively and deliver new insights about Napier and his works, whilst revising the many myths and assumptions that surround his life and character.

Prof. González-Velasco is a member of the UMass Lowell Department of Mathematical Sciences.


2016 William Lowell Putnam Mathematics Competition


Twenty-one UMass Lowell students competed in the 2016 William Lowell Putnam Mathematics Competition on Saturday, December 3. The competition took place concurrently throughout the US and Canada. Last year 4275 students students from 554 colleges and universities competed participated. There were two 3 hour sessions, each with six problems. As usual, the problems were tough. The consensus of students at the end was that this problem was one of the easiest:

Suppose that S is a finite set of points in the plane such that the area of triangle ABC is at most 1 whenever A, B, and  are in S. Show that there exists a triangle of area 4 that (together with its interior) covers the set S.


Thanks to the Honors College for providing refreshments for the students on the day of the event.

Results are normally announced in late March.

Tibor Beke awarded at Fulbright Fellowship for 2016-17

Prof. Tibor Beke

Prof. Tibor Beke

Prof. Tibor Beke of the Department of Mathematical Sciences has been awarded a Fulbright Fellowship for teaching and research at Masaryk University, Brno, in the Czech Republic.

During his stay in Brno, Prof. Beke will teach an advanced course on model-theoretic geometry.  Model-theoretic geometry is concerned with the geometry of objects defined by equations and inequalities over algebraically closed, real closed and p-adic fields.  This subject lies at the intersection of mathematical logic, algebra and geometry.  It can be thought of as a high-powered version of “coordinate geometry”, which describes Euclidean geometry in the algebraic language of linear and quadratic polynomials, and trigonometric functions.  Model-theoretic geometry extends this algebraic language to higher dimensions, non-Euclidean geometries, and works over structures that “look” very different from the real numbers.  In the last decade, the subject acquired algorithmic and computational components too.  The goal is, ultimately, to have computers analyze shapes and prove theorems about them.

This is an opportunity for Prof. Beke to continue joint research with Prof.  Jiri Rosicky, chair of the Mathematics Department at Brno. Tibor will return to Lowell l in the Fall of 2017.
The Fulbright Scholar Program is administered by the United States Department of State Bureau of Educational and Cultural Affairs.  It has been running continuously since 1948, and offers opportunities for US educators and other professionals in more than a hundred countries around the world.


2015 William Lowell Putnam Mathematics Competition

Twenty-four UMass Lowell students competed in the 2015 William Lowell Putnam Mathematics Competition on Saturday, December 5. The competition took place concurrently throughout the US and Canada. Normally, around 5,000 students compete each year. There were two 3 hour sessions, each with six problems. As usual, the problems were tough. The consensus of students at the end was that this was the easiest.

Given a list of the positive integers 1, 2, 3, 4, …, take the first three numbers 1,2,3 and their sum 6 and cross all four numbers off the list. Repeat with the three smallest remaining numbers 4, 5, 7 and their sum 16. Continue in this way, crossing off the three smallest remaining numbers and their sum, and consider the sequence of sums produced: 6, 16, 27, 36,…. Prove or disprove that there is some number in this sequence whose base 10 representation ends with 2015.
Thanks to the Honors College for providing refreshments for the students on the day of the event.
Results are normally announced in late March.


M. Brendan Fleming Scholarship

We are grateful to the family of Emeritus Professor M. Brendan Fleming for their recent contributions to the department’s growing scholarship funds. Through their generous gifts to the department, theM. Brendan Fleming Scholarship will be awarded to a meritorious mathematics major each year starting in 2017.

Professor M. Brendan Fleming was on the Lowell Tech/ULowell/UMass Lowell faculty for over 35 years,retiring in June 1996. Widely acclaimed as an excellent teacher, he was at theforefront of using statistics software to teach statistical analysis. In addition to his teaching and service to the university, he serveda member of the Lowell City Council for nine terms between the years of 1969 and 1992. He was Mayor of Lowell from 1982 to 1984. He and his late wifeBernice raised seven children to become active successful members of their community.

Prof. M. Brendan Fleming

New Faculty: Min Hyung Cho

This fall, we have welcomed Dr. Min Hyung Cho to the UML Department of Mathematical Sciences. Min Hyung is an applied mathematician who was most recently atDartmouth College. He holds a Ph. D. from TheUniversity of North Carolina at Charlotte, where his advisor was Prof. Wei Cai. The title of his dissertation was ‘Fast Integral Methods in Layered Media with Application in Photonic Devices.’

Min Hyung Cho

Dr. Cho’s research interests include

  • Computational Mathematics
  • Numerical solutions of PDEs
  • Fast Multipole Method (FMM) and treecodes
  • Wave propagation in layered media
  • High Performance Computing
Among his most recent publications are
  • M.H. Cho and A. Barnett, Robust fast direct integral equation solver for quasi-periodic scattering problems with a large number of layers, 23, 2, 1775-1799, Optics Express, 2015
  • M.H. Cho and W. Cai, A parallel fast algorithm for computing Helmholtz integral operator in 3-D layered media, 231, 17, 5910-5925, J. Computational Physics 2012
  • M.H. Cho and W. Cai, A wideband fast multipole method for two-dimensional complex Helmholtz equation, Computer Physics Communications, 2010
His faculty web page is