| Scholarly
addresses or lectures as invited speaker
On Subgroups of Hyperbolic Triangle Groups, Invited
Talk, Sophia University Mathematics Department, December
10, 2008.
Innovative Technologies in Mathematics Education,
Invited and Plenary Speaker, Mathematical Society
of the Philippines(MSP) Cordillera Administrative
Region-Regions 1 and 2 Chapters 2007 Mathematics Seminar
Series X, University of Baguio, Baguio City, 12 October
2007.
Technology in Mathematics Teaching and Learning:
Making do with what we have, Invited and Plenary Speaker,
Mathematical Society of the Philippines(MSP) 2007
Annual Convention, Bohol Tropics Resort, Bohol City,
18-19 May 2007.
Colour Groups of Crystallographic Lattices, Lecturer
as Visiting Professor, Research Collaborative Center,
Department of Mathematics, University of Bielefeld,
Germany, 1 December 2006.
Modern Geometry and its Applications, Invited Speaker
and Lecturer as Visiting Professor, Seminar-Workshop,
University of St. La Salle Graduate School, Bacolod
City, 03- 06 May 2006.
Colour Symmetries of Crystals, Lecturer as Visiting
Professor, Research Collaborative Center, Department
of Mathematics, University of Bielefeld, Germany,
21 October 2005
New Strategies in Teaching Geometry Using Technology,
Invited Speaker and Lecturer, Second Lecture Series
in Mathematics, University of Rizal System, Morong,
Rizal, 16 September 2005
New Trends in Technology in Mathematics Education,
Invited and Plenary Speaker, The Mathematics Teacher
Association of the Philippines(MTAP) 2005 Annual Convention,
Tertiary Level Chapter, University of the East, Manila,
2 June 2005
Abstract Algebra and its Applications, Invited Speaker
and Lecturer as Visiting Professor, Seminar-Workshop,
University of St. La Salle Graduate School, Bacolod
City, 09-13 May 2005
Inspiring Students to Study Mathematics with the
aid of Technology, Invited Speaker, Ninth Asian Technology
Conference in Mathematics-ATCM 04, Singapore, December
13-17 2004
Teaching Strategies with the Aid of Technology,
Invited Speaker, The Mathematical Society of the Philippines-NCR
Chapter Annual Convention 2004, Polytechnic University
of the Philippines, Sta Mesa, Manila, 6-7 March 2004
On One-way Infinite Hamiltonian paths of Cayley
Digraphs of Hyperbolic Symmetry groups, Invited Speaker,
National Research Council of the Philippines Mathematical
Symposium, UP Diliman, Quezon City, 7 February, 2004
Groups and Geometry in Art of Selected Philippine
Regions, Plenary Speaker, 4th Mathted Biennial Conference,
Benguet State University, La Trinidad, Benguet, 24-25
October 2003
Use Of Technology in Mathematics Teaching, Region
9 Seminar, Strengthening Mathematics Teaching Through
Technology and Innovations, Ateneo de Zamboanga,
30-31 May 2003
Symmetry Groups On The Hyperbolic Plane, Invited
Speaker, 2003 National Convention Of Math Teachers
Association Of The Phil(MTAP),Tertiary Level Chapter,
Technological Institute of the Philippines, Quezon
City, 3-4 May 2003
Mathematical Symmetry and Chemical Reality, The
Mathematical Society of the Philippines-NCR Chapter
Annual Convention 2003, Mapua Information Technology
Center, Makati City, 15-16 February 2003
On the Gelfand-Graev Representation of CSp(4,q),
Lecturer as Visiting Professor, Kyushu University,
Fukuoka, Japan, 2 June, 2002
On One-way Infinite Hamiltonian paths of Cayley
Digraphs of Hyperbolic Symmetry groups, Lecturer as
Visiting Professor, Sophia University, Tokyo, Japan,24
May, 2002
Groups and Colors, Lecturer, Mathematical Society
of the Philippines-National Capital Region Chapter,
Second Lecture Series, Mapua Institute of Technology,
Intramuros, Manila, 24 November 2001
Handheld Technology and Mathematics Education, Plenary
Speaker, 3rd Mathted Biennial Conference, Guimbal,
Iloilo City , 19-20 October 2001
On Some Finite Geometries, Lecturer, Annual Convention
of the Mathematics Teachers Association of the Philippines,
Stella Maris College, 13-14 October 2000
Studying Group Theory using Color Models, Plenary
Speaker, Model 2001-Workshop and Conference on Modeling,
Simulation and Scientific Computing, MSU-Iligan Institute
of Technology, Iligan City, 10 February 2001
Finite Fields and Applications to Coding Theory,
Lecturer, CHED-Center of Excellence in Mathematics,
Lecture Series in Combinatorics, Ateneo de Manila
University, 14 and 28 July, 11 August 2000
Color Symmetry, A Research in Combinatorial Group
Theory, Lecturer as Visiting Professor, Department
of Mathematics and Informatics, University of Essen,
Essen, Germany, 24 April 2000
Colorings, Lecturer, University of Santo Tomas/Department
of Mathematics and Physics College of Science and
Research Center for Natural Sciences, Research Lectures
in Mathematics, 4 March 2000
PCS Pictures and Colored Symmetrical Patterns ,Lecturer
as Visiting Professor, Department of Mathematics,
Sophia University, Tokyo, Japan,21 December 1998.
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