"The essence of mathematics lies in its freedom" (Georg Cantor)

Prof. Saburo ("Sab") Matsumoto
Professor of Mathematics
キャニオンズ大学 数理工学部 数学科 教授Me in SCOH 309.jpg


Office: Seco 309

Office hours (Spring, 2019):

    MTWTh from 9:15 to 9:45 pm in BONH 307

    or by appointment in SCOH 309 


Phone: (661) 362-3661
(I don't use the phone very often.)

Email: (the best way to contact me)


Schedule for Spring, 2019

​Course/Room ​Time Syllabus
​Math 214-37838, BONH 307 ​MTWTh 8:15 to 9:15 am 214sp19.pdf214sp19.pdf
​Math 213-37834, BONH 307 ​MTWTh 9:45 to 10:50 am 213sp19.pdf213sp19.pdf


the most important number in the world: e ( = 2.71828182845904523...)

e.jpg  e cups.jpg200px-Nautilus_Cutaway_with_Logarithmic_Spiral.png

Download graph paper here: graph paper (1cm),  graph paper (1/4 inch),  polar graph


[Brief Introduction] Although I was born and raised in Kobe, Japan, I have lived in many places around the world, including the Central Valley and the Bay Area of California, South Carolina, Virginia, Michigan, Mississippi, Yokohama (Japan) and Melbourne (Australia). My area of specialty is topology, the branch of pure mathematics sometimes referred to as "rubber-band geometry." A topologist is sometimes defined as a person who cannot distinguish between a coffee mug and a doughnut.


幾何学よ 桜の花の美しさ


Cherry blossoms display beautiful pentagonal shapes and the fifth Fibonacci number, 5.