if clicking on a link results in the message "Forbidden" or "the page cannot be displayed", then it is likely that that problem set is not ready yet.]

The program MathType was used to generate many of the equations on these web pages.   If you do not have MathType version 5 or higher installed on your computer, then you will need the fonts that it uses in order to view some of these web pages properly.   Otherwise some symbols will be displayed incorrectly, such as
        “Þ” for “” (implies),
        “a” for “” (alpha),
        “q” for “” (theta),
        “f” for “” (phi),
        “r” for “” (rho),
        “S” (or “3”) for “” (summation symbol),
        “-” for “” (minus sign).]
An executable file that downloads the necessary fonts onto your computer is available at this link.