Erik Guentner
Department of Mathematical Sciences
University of Hawaii at Manoa
2565 McCarthy Mall, Keller 401A
Honolulu, HI 96822

To Reach Me

email: erik@math.hawaii.edu
office phone: (808) 956-4660
office hours: Click here for current office hours.
schedule: Click here for current schedule.
fax: (808) 956-9139

Organizational Activities

Teaching

Math 241, Calculus I Math 421, Toppology

Research

Quote

In the mathematics I can report no deficience, except that it be that men do not sufficiently understand the excellent use of the pure mathematics, in that they do remedy and cure many defects in the wit and faculties intellectual. For if the wit be too dull, they sharpen it; if too wandering, they fix it; if too inherent in the sense, they abstract it. So that as tennis is a game of no use in itself, but of great use in respect it maketh a quick eye and a body ready to put itself into all postures; so in the mathematics, that use which is collateral and intervenient is no less worthy than that which is principal and intended.
Roger Bacon
(John Fauvel and Jeremy Gray (eds.) A History of Mathematics: A Reader, Sheridan House, 1987.)

More quotes (from the Mathematical Quotation Server).

Current weather in Honolulu, and at other places I have been.

Fourier Series

Graphs of the first 5 and 25 terms of the Fourier series of the step function with value -Pi/2 from -Pi to 0 and value Pi/2 from 0 to Pi...

[image]

The red line is the graph of y=2 sin(x) + 2/3 sin(3x) + 2/5 sin(5x).
You can probably guess the function of which the green line is the graph.

The Wave Equation

For yor amusement and viewing pleasure...
...a top view of a wave splitting in two, one piece travelling left and the other right; and a front view of the same thing...

[image] [image]
Other Web points of interest:

  • University of Hawaii Math Department
  • University of Hawaii