document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=782589>Question 782589</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The negative number integers are closed under subtraction.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #476448 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=476448\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This is <font color=\"red\">false</font> since for example -2 minus - 10 = -2 - (-10) = -2 + 10 = 8 which is NOT positive. There are infinitely many of these examples.\r<BR>\n" );
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document.write( "If this was closed (truly closed), then the result would always be negative. But it's not, so it's not closed. </SPAN>\n" );
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