!! used as default html header if there is none in the selected theme.
--- Introduction ---
This online exercise helps you to train yourself graphically to the concept
of subsets: union, intersection, complement, etc. It can either graphically
present a subset and ask you to recognize the corresponding formula, or give
a formula of subset and ask you to recognize it graphically.
This page is not in its usual appearance because WIMS is unable to recognize your
Please take note that WIMS pages are interactively generated; they are not ordinary
HTML files. They must be used interactively ONLINE. It is useless
for you to gather them through a robot program.
Description: recognize a graphically described subset. This is the main site of WIMS (WWW Interactive Multipurpose Server): interactive exercises, online calculators and plotters, mathematical recreation and games