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.

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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. WIMS site

Keywords: interactive mathematics, interactive math, server side interactivity, logic, set_theory, set_theory