document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=781166>Question 781166</A>: <I><SPAN STYLE=\"word-break: break-all;\"> what does it mean when it says: 'closd (under an operation)' ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #475803 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=475803\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This is the closure property<BR>\n" );
document.write( "A set is closed under an operation if and only if the operation on two elements of the set produces another element of the set.  If an element outside the set is produced, then the operation is not closed.  </SPAN>\n" );
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