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        <item>
            <title>Re: -1 x -1 ?</title>
        
            <link>http://mathforum.org/kb/thread.jspa?messageID=6708351&amp;tstart=0#6708351</link>

        

            <description><![CDATA[On May 11, 9:59 pm, Kayama &lt;yano...@earth.ocn.ne.jp&gt; wrote:<br><font color="#660066">&gt; If we can use the expression -1=e^{i\pi}, we can]]></description>

        

            <jf:creationDate>May 13, 2009 9:01:32 AM</jf:creationDate>
            <jf:modificationDate>May 13, 2009 9:01:32 AM</jf:modificationDate>
            <jf:author>azeez541@gmail.com</jf:author>
            <jf:replyCount>0</jf:replyCount>
        </item>

        <item>
            <title>Re: -1 x -1 ?</title>
        
            <link>http://mathforum.org/kb/thread.jspa?messageID=6708350&amp;tstart=0#6708350</link>

        

            <description><![CDATA[On May 12, 7:17 pm, Bill Taylor &lt;w.tay...@math.canterbury.ac.nz&gt;<br>wrote:<br><font color="#660066">&gt; MAy we let Ogden Nash have the last]]></description>

        

            <jf:creationDate>May 13, 2009 8:59:05 AM</jf:creationDate>
            <jf:modificationDate>May 13, 2009 8:59:05 AM</jf:modificationDate>
            <jf:author>azeez541@gmail.com</jf:author>
            <jf:replyCount>0</jf:replyCount>
        </item>

        <item>
            <title>Re: -1 x -1 ?</title>
        
            <link>http://mathforum.org/kb/thread.jspa?messageID=6707812&amp;tstart=0#6707812</link>

        

            <description><![CDATA[MAy we let Ogden Nash have the last word... ?<br><br>**  Minus times minus results in a plus,<br>**  The reason for this, though, we need not]]></description>

        

            <jf:creationDate>May 12, 2009 10:17:53 PM</jf:creationDate>
            <jf:modificationDate>May 12, 2009 10:17:53 PM</jf:modificationDate>
            <jf:author>w.taylor@math.canterbury.ac.nz</jf:author>
            <jf:replyCount>1</jf:replyCount>
        </item>

        <item>
            <title>Re: -1 x -1 ?</title>
        
            <link>http://mathforum.org/kb/thread.jspa?messageID=6707015&amp;tstart=0#6707015</link>

        

            <description><![CDATA[hagman &lt;google@von-eitzen.de&gt; wrote:<br><font color="#660066">&gt; On 12 Mai, 06:59, Kayama &lt;yano...@earth.ocn.ne.jp&gt;]]></description>

        

            <jf:creationDate>May 12, 2009 12:37:13 PM</jf:creationDate>
            <jf:modificationDate>May 12, 2009 12:37:13 PM</jf:modificationDate>
            <jf:author>wgd@nestle.csail.mit.edu</jf:author>
            <jf:replyCount>0</jf:replyCount>
        </item>

        <item>
            <title>Re: -1 x -1 ?</title>
        
            <link>http://mathforum.org/kb/thread.jspa?messageID=6706094&amp;tstart=0#6706094</link>

        

            <description><![CDATA[On 12 Mai, 06:59, Kayama &lt;yano...@earth.ocn.ne.jp&gt; wrote:<br><font color="#660066">&gt; If we can use the expression -1=e^{i\pi}, we can]]></description>

        

            <jf:creationDate>May 12, 2009 4:17:15 AM</jf:creationDate>
            <jf:modificationDate>May 12, 2009 4:17:15 AM</jf:modificationDate>
            <jf:author>google@von-eitzen.de</jf:author>
            <jf:replyCount>1</jf:replyCount>
        </item>

        <item>
            <title>Re: -1 x -1 ?</title>
        
            <link>http://mathforum.org/kb/thread.jspa?messageID=6705928&amp;tstart=0#6705928</link>

        

            <description><![CDATA[On May 11, 11:59?pm, Kayama &lt;yano...@earth.ocn.ne.jp&gt; wrote:<br><font color="#660066">&gt; If we can use the expression -1=e^{i\pi}, we can]]></description>

        

            <jf:creationDate>May 12, 2009 1:30:28 AM</jf:creationDate>
            <jf:modificationDate>May 12, 2009 1:30:28 AM</jf:modificationDate>
            <jf:author>mensanator@aol.com</jf:author>
            <jf:replyCount>0</jf:replyCount>
        </item>

        <item>
            <title>Re: -1 x -1 ?</title>
        
            <link>http://mathforum.org/kb/thread.jspa?messageID=6705901&amp;tstart=0#6705901</link>

        

            <description><![CDATA[If we can use the expression -1=e^{i\pi}, we can show <br>-1*-1=e^{i\pi}*e^{i\pi}=1 readily:<br><br>if we rotate once 1 (the vector 01) by \pi rad]]></description>

        

            <jf:creationDate>May 12, 2009 12:59:48 AM</jf:creationDate>
            <jf:modificationDate>May 12, 2009 12:59:48 AM</jf:modificationDate>
            <jf:author>Kayama</jf:author>
            <jf:replyCount>6</jf:replyCount>
        </item>

        <item>
            <title>Re: -1 x -1 ?</title>
        
            <link>http://mathforum.org/kb/thread.jspa?messageID=6579437&amp;tstart=0#6579437</link>

        

            <description><![CDATA[On Jan 22, 11:21 am, David R Tribble &lt;da...@tribble.com&gt; wrote:<br><font color="#660066">&gt; Tay wrote:</font><br><font color="#3377ff">&gt;]]></description>

        

            <jf:creationDate>Jan 22, 2009 1:50:03 PM</jf:creationDate>
            <jf:modificationDate>Jan 22, 2009 1:50:03 PM</jf:modificationDate>
            <jf:author>mensanator@aol.com</jf:author>
            <jf:replyCount>0</jf:replyCount>
        </item>

        <item>
            <title>Re: -1 x -1 ?</title>
        
            <link>http://mathforum.org/kb/thread.jspa?messageID=6579367&amp;tstart=0#6579367</link>

        

            <description><![CDATA[Tay wrote:<br><br><font color="#660066">&gt; -1 *-1 = 1 huh?<br>&gt;<br>&gt; Well, think of it like this:<br>&gt;<br>&gt; The minus (negative) signs]]></description>

        

            <jf:creationDate>Jan 22, 2009 12:39:53 PM</jf:creationDate>
            <jf:modificationDate>Jan 22, 2009 12:39:53 PM</jf:modificationDate>
            <jf:author>renfr1dl@cmich.edu</jf:author>
            <jf:replyCount>0</jf:replyCount>
        </item>

        <item>
            <title>Re: -1 x -1 ?</title>
        
            <link>http://mathforum.org/kb/thread.jspa?messageID=6579349&amp;tstart=0#6579349</link>

        

            <description><![CDATA[Tay wrote:<br><font color="#007777">&gt;&gt; -1 *-1 = 1 huh?<br>&gt;&gt; It's so simple.</font><br><font]]></description>

        

            <jf:creationDate>Jan 22, 2009 12:21:48 PM</jf:creationDate>
            <jf:modificationDate>Jan 22, 2009 12:21:48 PM</jf:modificationDate>
            <jf:author>david@tribble.com</jf:author>
            <jf:replyCount>0</jf:replyCount>
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