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Phone: 776-7223
E-Mail: ghagopian@collegeofthedesert.edu

picme
Geoff Hagopian

Professor of Mathematics
College
of the Desert 

MA, Mathematics,
University of California at Davis, 1986
BA, Mathematics,
University of California at Santa Cruz, 1982

Fall '09 Schedule will be available later.

Fall 2009 Schedule

time

Monday

Tuesday

Wednesday

Thursday

8 - 9:10
Math 2A - Multivariate Calculus
9:30-11:00
office hours
11 - 12:20
Intermediate Algebra 
         
2 - 3:20
Geometry SOC13
Geometry SOC13
 
5:15 - 7:45
Precalc  E.A.4
Precalc  E.A.4

 

 

Pi Day, 2008 Photo Gallery

 

Current Interests:

Symmetry

Riemann Hypothesis

SLOs Controversy


Scientific Visualization: Sabbatical Proposal for 2005/6
Geometer's Sketchpad
Earth Systems Science

Play Algebra Arcade
Sabbatical Work

My report on AMS/MAA joint meetings attendance in New Orleans, 2004.
| My report on CMC3 conference in Monterey, December 2008.
Review of Time Magazine article about community colleges

The theme of
Mathematics Awareness Month 2006
was
Mathematics and Internet Security
Past MAM Themes

My User’s Guide to the TI-85

TI-85Program Archive

Large Integers on the TI-85

22,976,221 - 1
is prime!
... and, as of November 17, 2003
we know

220,996,011 - 1

is also prime!
Join the Great Internet Mersenne Prime Search
 

I was amazed by this talk given by Bonnie Besslar at TED (link below.)
(disclaimer: there is an ad by General Electric, a really bad corporation)

Earth Statistics

Mass (kg)

5.976e+24

Mass (Earth = 1)

1.0000e+00

Equatorial radius (km)

6,378.14

Equatorial radius (Earth = 1)

1.0000e+00

Mean density (gm/cm^3)

5.515

Mean distance from the Sun (km) 

149,600,000

Mean distance from the Sun (Earth = 1)

1.0000

Rotational period (days)

0.99727 

Rotational period (hours)

23.9345

Orbital period (days)

365.256

Mean orbital velocity (km/sec)

29.79

Orbital eccentricity

0.0167

Tilt of axis (degrees)

23.45

Orbital inclination (degrees)

0.000

Equatorial escape velocity (km/sec)

11.18 

Equatorial surface gravity (m/sec^2)

9.78

Visual geometric albedo

0.37

Mean surface temperature

15°C

 

Atmospheric composition

Nitrogen 

77%

Oxygen

21%

Other

2%

 

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