Leonhard Euler	Each of the test files below displays Euler's result that the sum of the squares of the reciprocals of the positive integers is the square of pi divided by 6. Euler discovered this fact in 1734 and published a proof in a textbook in 1748.
1707-1783	Browser Test Files

You will need to be able to view PDF files to view most of the mathematical documents on this web site. Your browser may be configured to display Adobe PDF files by means of the Adobe Acrobat Reader plugin, or may use the Acrobat Reader as a separately launched viewer, or you can run the Reader as a separate application yourself, to view PDF files. Recent versions of GhostView-Ghostscript will also display PDF files. There are a number of other viewers available as well.

In case of problems with the PDF files check here.

Not all viewers run as plugins. However,  your browser can be configured to view just about any type of file by launching the appropriate application, provided the application is on your system. If you are not sure if your browser has been properly configured try the small test files below.

Additional Tests

1. Some browsers (for example, Internet Explorer) support the <marquee> command. Does yours? Check marquee_test.html
2. Check your browser's ability to handle table and cell backgrounds correctly - check table_tests.html

I preview my web pages in Konqueror running under Linux. Life is too short for exhaustive checks, so please let me know if you have a problem.

The following table runs a JavaScript script to see how your browser identifies itself.