Thomas Q. Sibley
Professor of Mathematics
St. John's University
Collegeville, MN 56321-3000
Engel 243 Phone: (320) 363-3810



I now have a signed contract for my rewritten textbook, Thinking Geometrically: A Survey of Geometries, to be published by the Mathematical Association of America.  I have rewritten many of the old problems and added many new ones.  In addition, I have added two new chapters on differential geometry and discrete geometry.  I expect this new version to be published in the spring of 2015.

Until the new text is published, people may still download the old version The Geometric Viewpoint: A Survey of Geometries for free use in geometry classes.  Click on this link to go to the pdf files of the somewhat modified text.  (I have corrected the errors I know and I have covered up the material, mostly figures, for which I no longer have copyright permission.)  Professors adopting this old version can get a pdf version of the answers by contacting me.  I would appreciate knowing who has adopted my text. 

Here are links of videos of change ringing with three bells and with four bells.

The link Summer Research will take you to the description of the Mathematics Department's summer program and an old application form. 

Click on North Central Section to go to the section's home page.  Click on MAA to go to the national organization's home page.

     The link Foundations Text (below) has information on my textbook, The Foundations of Mathematics, published in March 2008 by Wiley.  My Research web page has descriptions of my research interests, of articles I have written, and of projects I hope to be doing with students.  You can see a version of my Curriculum vitae by clicking below.  There are two links for information about careers in mathematics.  At the end of this page are links for some pictures. 

                                             Foundations Text                     

           research           e-mail to me        cv    

                        Mathematics Department Home Page     CSB/SJU Home Page

                                              Careers            When Will I Use Math

MWF 9:10 am  Algebraic Structures II
MWF 11:30 am  Math Explorations (Section 1)
MWF  12:40 pm  Math Explorations (Section 2)
T-TH 11:10 Audit
T-TH 2:40 Math Department Meeting or Seminar

Independent Study (TBA)


You can find additional help in mathematics at the Mathematical Skills Center. 
The link below will take you to the home page for the skills center.

(Hours on that web page.)
CSB HAB room 4, ext. 5236

SJU PENGEL 232, ext. 2061


The first picture below shows me judging during the 2000 Donut Coloring Contest.  The middle one features some of the students in my 1999 geometry class and their finished tensegrity figure.  The picture on the right highlights Math Society students in 1985 making a small stellated rombicosidodecahedron out of straws and string.  A more recent stellated rombicosidodecahedron is hanging in the Student Lounge of the Engel Science building at SJU, along with the tensegrity figure.

                           Donut                            Tensegrity                        Stellation       

The views and opinions expressed in this page are strictly those of the author.  The contents of this page have not been reviewed or approved by the College of Saint Benedict/Saint John's University.

This web site last updated 8 December, 2014.