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, the M. 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 the forefront of using statistics software to teach statistical analysis.  In addition to his teaching and service to the university, he served a 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 wife Bernice 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 at  Dartmouth College.  He holds a Ph. D. from The University 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  http://faculty.uml.edu/min_cho/

The Mathematical Sciences and Work Environment Departments recently completed the design of a five-year program leading to a Bachelor of Science in Mathematics and a Master's in Public Health in Epidemiology. Juniors can apply to the program and double-count up to nine credits toward the two degrees. A bit of planning is recommended since appliants are advised to take a few courses as undergraduates, such as Anatomy and Physiology I & II. 

With the outbreak of Ebola in the U.S. last fall, epidemiologists have had their work cut out for them. Whether they investigate the triggers of an infection for a public health agency or collect blood samples at an outpatient care center, epidemiologists examine the causes of diseases to prevent them from transmitting and recurring. These medical scientists might work in hospitals, laboratories or universities, or for pharmaceutical companies or health insurers. 

The Bureau of Labor Statistics predicts employment growth of about 13 percent between 2012 and 2022. Job prospects look promising, especially for medical scientists looking to work for state or local governments and general medical or surgical hospitals.

Congratulations to Central Catholic High School Mathematics Department Chair/Teacher Jarrod Brown (UML Class of ‘04) on receiving the Sontag Prize in Urban Education for Mathematics.

The Sontag Prize in Urban Education recognizes outstanding teaching in Mathematics, English Language Arts (ELA) and other disciplines. Educators chosen for the Sontag Prize will lead classes as part of the LPS Acceleration Academy, a program designed to provide targeted small group support for students. 

Any educator from within the city of Lawrence, MA or across the country is eligible to apply for the Sontag Prize. In addition to an honorarium, new Sontag Prize awardees participate in a weekend of professional development at Harvard University February 14th and 15th. The opportunity provides motivated and successful educators like Jarrod the chance to share best practices with their fellow awardees. Most importantly, this award recognizes excellence in teaching and provides students with an extra week of high-quality instruction. This program is generously supported by the Lynch Foundation. 

This isn’t the first time Jarrod has been recognized for his teaching, In 2013, Jarrod received a Math Hero Award and grant of $2,500 through Raytheon Corporation’s “Math Moves U” program. He was nominated for this award by current and former students for his instructional creativity and patience, varied use of technology resources, and his ability to share his enthusiasm for mathematics with his students. 

Jarrod earned a B.S. in Mathematics from the University of Massachusetts at Lowell and a M.Ed from American International College. In his 12th year as a math teacher, Brown’s teaching experience includes leading classes in Algebra 1, Geometry, Algebra 2 & Trigonometry, Pre-Calculus, and Calculus. 

Jarrod has also served as an assistant coach in football and track in addition to being the instructor for the Karate and Martial Arts Club at Central Catholic. Brown and his wife and two children make their home in Dracut, MA. 

New Faculty: Prof. Hung Phan


This spring, we have welcomed Dr. Hung Phan to the UML Department of Mathematical Sciences.  Dr. Phan is an applied mathematician who was most recently at the University of British Columbia,  Okanagan.   No doubt he has been right at home in the past few weeks as we've had two major snow storms!   

Hung's general research areas are Optimization, Numerical Methods, and Variational Analysis.  His  Ph. D. was earned at Wayne State University, with a thesis titled New Variational Principles with Applications in Optimization Theory and Algorithms (Advisor: Boris Mordukhovich).

Here are three of his recent publications:

  • Linear and strong convergence of algorithms involving averaged non expansive operators,(with H.H. Bauschke, D. Noll)  Journal of Mathematical Analysis and Applications 421 (2015), 1-20
  • The rate of linear convergence of the Douglas-Rachford algorithm for subspaces(with H.H. Bauschke, J.Y. Bello Cruz, T.T.A. Nghia, X. Wang) Journal of Approximation Theory 185 (2014), 63-79
  • Restricted normal cones and sparsity optimization with affine constraints(with H.H. Bauschke, D.R. Luke, X. Wang), Foundations of Computational Mathematics 14 (2014), 63-83

His web page is http://faculty.uml.edu/hung_phan/

What a way to spend your Saturday!  Get yourself to campus for 10 AM and work on six math problems for three hours.   Then after a two hour break, spend another three hours of six more problems. That's what thousands of undergraduate students throughout the US and Canada, including 14 UML students, did on December 6 to take part in the  2014 William Lowell Putnam Mathematics Competition.

The Problems

The problems are all considered "elementary" in that they only require the background of basic undergraduate mathematics courses to understand.  They are definitely not "easy."   Historically, the median score out of 120 (10 points per problem) higher than single digits, and there have  been years when the median was zero!   In each session the first two problems tend to be somewhat easier than the other four.  Here is the first problem from the morning session, which a Calculus II student should understand.

Prove that every nonzero coefficient of the Taylor series of \[(1-x+x^{2})e^{x}\] about \(x=0\) is a rational number whose numerator (in lowest terms) is either 1 or a prime number.

If you work on this, remember that the the competition prohibits books or any electronic devices!

The UML Team

The participants from UMass Lowell this year included 12 "rookies" who had not previously competed in the Putnam.  All were part of the Honors Problem Solving course taught by Ken Levasseur this semester.   They were Kenneth Allen, Marissa Ard, Anna Baturin, Stephanie Bellerose, James Carbone, Damir Ismagilov, Alex Kane, George Katsaros, Chanson Lim, Erinn McLaughlin, Grant Moyer, and John Romano.

Returning for their second year in the completion were Jonathan Edwin and Alvin Kow.  Graduate student Chuck Bradley was ineligible for the competition, but participated in practices and lent moral support to the participants.

Scoring the competition is a long process carried out by Putnam staff at the University of Santa Clara.  Scores normally are announced in April.

Next year's competition will be on Saturday December 5, 2015.

This fall, we have welcomed Dr. Jong Soo Lee to our department.  Dr.  Lee is  a statistician who was most recently at the University of Delaware.   His general research areas are functional data analysis, nonparametric statistics and the application of statistics. 

Jong Soo earned his Ph. D.  at Rice University with a thesis titled Aspects of Functional Data Inference and Its Applications (Advisor: Dennis Cox).


Mathematicians have used visual representations of abstract mathematics for many years.   With the recent availability of inexpensive 3D printers, it's now easier to build these objects.    Prof. Rida Mirie has started to develop an expertise in this area.   Using a DaVinci printer, he is working on printing objects that match the surfaces that students encounter in courses such as Calculus III.

This has come just at the right time for Prof. Tibor Beke, who is teaching a section of Explorations in Math to students in the Humanities, Fine Arts and Social Sciences who have accepted the challenge to explore some mathematics as a somewhat higher level than is normally offered to students on our South Campus. 

We all know the formula \[ 1+ 2 +3+ \dots + n = \frac{n(n+1)}{2} \]
that can be justified in a number of ways --- by induction, but adding the left-hand sum to itself in the reverse order, or by decomposing an \(n\) by \(n+1\) rectangle into two congruent pieces, each of which contains \(1+2+3+\dots+n\) unit squares.  But what about \(1^2 + 2^2 + 3^3 + \dots + n^2 \)?   A nice way to visualize such a sum is as the number of cubes in a skewed  "Mayan pyramid."    Here is are six Mayan pyramids printed by Rida that are a visual representation of \(1^2 + 2^2 + 3^2 + 4^2 \).

six mayan pyramids
Three such pyramids can be combined to form a cuboid with a set of steps next to one of the faces.   The steps in two such formations can, if you orient the pieces correctly, be fit together.

Thumbnail image for maya_2.jpg

When this is done, you get a single cuboid.   In this case, it's a \(4 \times 5 \times 9\) cuboid, demonstrating that \(6(1^2 + 2^2 + 3^2 + 4^2) = 4 \times 5 \times 9 \).   The 5 in this equality is one more the 4 and 9 is one more than \(2 \times 4 \).

Thumbnail image for Thumbnail image for maya_3.jpg
This configuration works for the sum of the first \(n\) squares for all positive values of \(n\), which demonstrates a general identity, after dividing by 6:  \[  \sum _{k=1}^{n } {k^2} =  \frac{n(n+1)(2n+1)}{6} \]

The nice thing about having a tactile representation of this fact is that students can actually put the pieces together and see how it is really not dependent on the number of squares.  "Proofs with no words" such as this one have traditionally been accepted as valid proofs.  They are limited to our three dimensions, but the printing of complex objects opens up possibilities that we haven't had until now.

This is the first Khronicles since last December, and we've been busy with several personnel changes since then.   

New Hires

Early in January of this year we were authorized to do faculty searches for two tenure-track positions, a statistician and an applied mathematician.  Although it was a late start, we are happy to announce that both searches were successful.  

Dr. Jong Soo Lee, a statistician who was most recently at the University of Delaware, has joined us this fall.  His general research areas are functional data analysis, nonparametric statistics and the application of statistics.  His Ph. D. was earned at Rice University with a thesis titled Aspects of Functional Data Inference and Its Applications (Advisor: Dennis Cox).

Dr. Hung Phan, an applied mathematician who was most recently at the University of British Columbia,  Okanagan, will join us in the spring.  His general research areas are Optimization, Numerical Methods, and Variational Analysis.  His  Ph. D. was earned at Wayne State University,  with a thesis titled New Variational Principles with Applications in Optimization Theory and Algorithms (Advisor: Boris Mordukhovich).


This infusion of new personnel comes just in time to offset losses due to retirement.  Charlie Byrne retired after being with us since 1986.  He served as department chair for a term, and graduate coordinator for many years.   His expertise in areas such as optimization and image processing is hard to replace.   

Congratulations to Charlie on his recently published book, An Introduction to Optimization.

In addition, we've lost the services of Alan Kaplan, who retired after forty years of service.   His many contributions to the department will be missed.

More Hiring

More good news is that we've been authorized to do two more searches for tenure-track faculty.  We've decided to search for another statistician and a mathematician.  The research area for the mathematician is a bit less focused that in our earlier search.  To see details of our postings, go to the UML Jobs site.

More News

There is plenty of other news to report, but I intend to make these postings more frequent.  So I'll close here.

I guess the biggest news centered around Lowell this summer has been the Market Basket fiasco.  A couple of weeks into the boycott, I thought I'd create a visual to contrast our spending at different markets in the past year.   Naturally, I used Mathematica.  Here is a version of the plot I posted on a Facebook group site related to Lowell:

MRKT BSKTSHAWspending.jpg
Naturally, the plot labeled MRKT BSKT is our spending at Market Basket.  The SHAW graph is actually a combination of our spending at Shaw's and Hannaford's.  I think I stopped at Shaw's around February and bought a few items, but other than that, spending there started at the same time as the boycott.

Instead of making this a one-time exercise, I decided to develop a function that would create other graphs like this one.   My main summer project has been to rebuild the stairs at my son's house in Chelmsford, adding a small deck.    Out of convenience, my main spending on the project, which started in mid-July, has been at three locations.  They are my local NH Home Depot (no sales tax!), where I've bought most of the smaller items I could fit into my Subaru,  the Lowell Lowe's, which is five minute from the project and where I've bought several last minute items I didn't expect to need, and finally, Friend Lumber from whom I've had lumber delivered.   Here is the spending plot at those locations for 2014, with another ~$100 spending to go at this point:

LOWEHOME Dspending.jpg

One more example, here is my coffee spending - this is flawed in that it is only the debit card spending, so a lot of my purchases at Einstein's during the year are not included.   A&E is my local coffee roaster, and I definitely spend more there that anywhere else, even if I took into account cash sales.  Also, I use the Starbucks app on my phone, which is why larger, less frequent purchases are recorded there.
My spending on coffee

If you'd like to try this with your spending, you can download a copy of the Mathematica Package that creates these graphs.    The package assumes you have a Bank of America debit card.  You would download activity from your account and use the file path to that .csv file on your computer to specify the data file.  With a bit of Mathematica expertise, it shouldn't be hard to adapt the package to other banking systems.

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