The Clavius Group
Collaboration in Mathematical Research

"Let an academy be formed for the advancement of mathematics"

(Christopher Clavius SJ in 1596)

54th Year
College of the Holy Cross
June-July 2016



Clavius Activities at Holy Cross in 2015




Clavius Group at Holy Cross in 2015


About the Clavius Group

The Clavius Mathematical Research Group is a team of about 30 mathematicians who spend three summer weeks together, doing mathematical research while sharing work, prayer, and recreation. For more than 50 years, they have been meeting on college campuses and research institutes in the US and abroad and interacting with the members of the host mathematics departments. About one-third of the members are Jesuit mathematicians. The lay mathematicians attend with their families. Although most currently active members are from the United States, Brazil, Canada, Colombia, India, Poland and Spain are also represented. In earlier years, there have also been members from the Dominican Republic, France and Italy.

Members of the Clavius Group specialize in Algebra, Algebraic Geometry, Algebraic Topology, Graph Theory, Complex Analysis, Differential Geometry, Differential Topology, Foliations, Mathematics of Relativity, Mathematical Logic, Noncommutative Rings, Number Theory, Partial Differential Equations and Topology of Manifolds.

Christopher Clavius, SJ
The Euclid of the Sixteenth Century

The Clavius Group was named for the sixteenth century German Jesuit mathematician, Christopher Clavius. A more extensive history of the Clavius group along with an account of Clavius' scientific work, written by Joseph MacDonnell SJ, may be found here .



Joseph MacDonnell, SJ (1929 - 2005)


The original design and text for this website is the work of the late Fr. Joseph MacDonnell, who was Professor of Mathematics at Fairfield University and long time member of the Clavius Group. In addition to chronicling the activities of the Clavius Group, Fr. MacDonnell collected information and authored books on the history of Mathematics, Fairfield University, and the Society of Jesus. His original home page is maintained at Fairfield University and may be accessed by clicking here .


Current List of Clavius Mathematicians



Jennifer Ackerman
Michael Ackerman
Tom Banchoff
Adam Bartoszek
Jacob Binoy SJ
John Blanton
Tom Cecil
Lawrence Conlon
Pedro Ferreira SJ
Margaret Freije
Richard Freije
Kathy Hall
James Heitsch
Michele Intermont
Ron Knill
Javier Leach SJ


Jack Lutts
Maura Mast
Michael May SJ
Sr Barbara Reynolds SDS
Patrick Ryan
Paul Schweitzer SJ
Dennis Snow
Joanne Snow
James Stasheff
Pedro Suarez SJ
Andrius Tamulis
Carlos Vasco
Nelson Velandia SJ
Julio Vidaurrazaga
Pawel Walczak



Further details on members of the Clavius Group


Host Institutions (All Years)




LOCATIONYEAR------------LOCATIONYEAR
Georgetown University '63 Loyola, New Orleans '64 '65 '66
Mexico City '67 '68 '71 '72 '77 Boston College '69 '93 '96 '04 '07 '11
Northwestern '70 '74 McGill, Montreal '73
Institute for Advanced Study '75 '79 '84 '89 '94 '01 Princeton University '76
Institut des Hautes Études '78 '82 '87 '92 '97 '03 University of Notre Dame '80 '85 '90 '95 '00 '05 '09 '14
College of the Holy Cross '81 '83 '99 '06 '10 '15 '16 UC Berkeley '86
Fairfield University '88 '91 '98 '02 '12 Saint Louis University '08
Loyola University Maryland '13

Host institution according to year (Full Listing)


Host Institutions According to Year (Since 2000)




YEAR LOCATION------------YEAR LOCATION
2000 University of Notre Dame2009 University of Notre Dame
2001 Institute for Advanced Study 2010 College of the Holy Cross
2002 Fairfield University2011 Boston College
2003 Institut des Hautes Études Scientifique2012 Fairfield University
2004 Boston College2013 Loyola University Maryland
2005 University of Notre Dame2014 University of Notre Dame
2006 College of the Holy Cross2015 College of the Holy Cross
2007 Boston College2016 College of the Holy Cross
2008 Saint Louis University



Andrew Whitman, SJ (1926 - 2015)




Andy died on January 7, 2015. He was 88 years old, a Jesuit for 63 years, a priest for 51 years and a co-founder of the Clavius group. More about Andy's life may be found here .


William Stoeger, SJ (1943 - 2014)


Bill died on March 24, 2014 after a struggle with cancer. He was an astrophysicist and cosmologist who served as a staff scientist for the Vatican Observatory Research Group in Tucson and an adjunct professor at the University of Arizona. He will be remembered by fellow Clavians for his fascinating lectures on the formation of stars and the origins of the universe. More about Bill may be found here .



John Poluikis, CSB (1923 - 2012)


John passed away on May 28, 2012. He was Professor Emeritus at St. John Fisher College and an active and enthusiastic particpant in Clavius summer meetings for over 30 years. Further information about his life may be found here .




Andrew Whitman Awarded Papal Honor


On January 26, 2011, Andrew Whitman, SJ, received the Holy Cross Pro Ecclesia et Pontifice, a special honor given by Pope Benedict XVI for distinguished service to the Church. This year we celebrate Andy's 60th year as a Jesuit, his co-founding (with Larry Conlon) of the Clavius group, and his continuing inspiration and contribution to the intellectual apostolate. We also acknowledge his many years of service, first as a professor and then as a member of the Vatican Observatory. More information about Andy's life and accomplishments can be found in two recent news items, one in the Southern Jesuit and one in the Vatican Observatory newsletter.



Hugh Albright, FSC (1928 - 2011)


Hugh passed away on February 25, 2011. Memorial tributes and information about his life may be found here . This material has been compiled by Joanne Snow.




Clavius Group and colleagues at France's
Institut des Hautes Études Scientifique in 1985


Clavius activities at Notre Dame in 1995


Clavius Activities at Holy Cross in 2015
Clavius Activities at Notre Dame in 2014
Clavius Activities at Loyola University Maryland in 2013
Clavius Activities at Fairfield University in 2012
Clavius Activities at Boston College in 2011
Clavius Activities at Holy Cross in 2010
Clavius Activities at Notre Dame in 2009
Clavius Activities at Saint Louis University in 2008
Clavius Activities at Boston College in 2007
Clavius Activities at Holy Cross in 2006
Clavius Activities at Notre Dame in 2005

Proceedings of the Symposium on Christopher Clavius held at Notre Dame in 2005

Clavius Activities at Boston College in 2004
Clavius Activities at the Institut des Hautes Études Scientifique in 2003
Clavius Activities at Fairfield University in 2002
Clavius Activities at the Institute for Advanced Study in 2001
Clavius Activities at Notre Dame in 2000

Clavius Activities at Holy Cross in 1999
Clavius Activities at Fairfield University in 1998
Clavius Activities at the Institut des Hautes Études Scientifique in 1997
Clavius Activities at Boston College in 1996
Clavius Activities at Notre Dame in 1995
Clavius Activities at the Institute for Advanced Study in 1994
Clavius Activities at Boston College in 1993
Clavius Activities at the Institut des Hautes Études Scientifique in 1992
Clavius Activities at Fairfield University in 1991
Clavius Activities at Notre Dame in 1990

Contact Information for This Site


email: clavius@cogeco.ca