Home Page - Joel W. Robbin

Mathematics Department, University of Wisconsin, Madison, Wisconsin 53706 My Phone: 608. 263-4698. Department Phone: 608. 263-3054. Department Fax: 608. 263-8891. Email: robbin@math.wisc.edu Office hours: MW 1-2, T 10-12, or by (email) appointment.

Current Course: Math 112 (College Algebra.)

• Some extra credit problems.
• Here is the final exam for math 112 from last fall.

Information on WeBWorK

Timetable and Recent Enrollment Figures

Old Courses:

• Math 131 Home Page (Fall 2007).
• Math 141 Home page (Fall 2006)
• Calculus 221 Home Page Fall 2006)
• Calculus 222 Home Page (Spring 2007).
• Calculus 234 Home Page (Fall 2001).
• Math 461 Home Page (Spring 2002)
• Math 541 Home Page (Fall 2000).
• Math 542 Home Page (Spring 2001).
• Topology Seminar 951 (Fall 2001)

Some talks.

• A talk on the dynamical zeta function.
• A talk on Heegard Splittings and Floer Homology.
• A paper on Heegard Splittings and Morse-Smale Flows.
• A seminar on Hamiltonian Toric Manifolds.
• A note on Kergin-Lagrange Interpolation.
• An exposition of the moment map.
• I never published my PhD thesis: Subrecursive Hierarchies. Click on the link to download it. (It was accepted by the JSL but I never got around to making the revisions the referee suggested.)

Paradoxes.

• A proof that every triangle is isosceles.
• Another proof that every triangle is isosceles.
• A proof that every angle is a right angle.
• You can cut up a triangle and rearrange the pieces to make one of larger area!

Careers in mathematics.

• Why major in Mathematics? (University of Georgia)
• Mathematics Job Opportunities? (University of Georgia)
• MAA Online review of 101 Careers in Mathematics
• MAA Online review of She Does Math
• MAA Online review of Great Jobs For Math Majors
• Career Profiles (Part of the AMS-MAA-SIAM Mathematical Sciences Career Information Project)

Miscellaneous.

• Try the Java Powered Graphing Calculator.
• Announcing a new Journal: The Proceedings of the Angelic Brew Pub Seminar.
• Try Vadim Ponomarenko's math skills test.
• I am the author of Matrix Algebra Using MINImal MATlab
• Try MINIMAT. (It's a big Java applet, so be patient while it downloads over the net.) You can download the whole MINIMAT program, (Java Version), or if you prefer to use MatLab, download just the mfiles. You can read the MINIMAT Reference Manual. (The manual is inculded in the download of the whole program, but you might want to read the section on running MNINMAT on your own computer before you download.)
• Try the LinearTransformation Grapher. With it you can define a linear transformation (u,v)=T(x,y), scribble in the (x,y) window (or the (u,v) window), and see the image (or the pre image) in the other window.
• Here is a proof of the Pythagorean Theorem.
• Try the Color Game!.
• Here are the words to some Funny Songs
• Examine Robin Pemantle's Higgledy Piggledy Data Base
• TTPrompt