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Some mathematics books use U and E to represent the Identity Matrix (meaning " Unit Matrix" and "Elementary Matrix", or from the German "Einheitsmatrix", respectively), although I is considered more universal. http://en.wikipedia.org/wiki/Identity_matrix |
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Ó¢ÓïµÄÎÊÌ⻹ÊÇҪͨ¹ýgoogleÀ´½â¾ö¡£¡£¡£¡£ Identity matrix£¨From Wikipedia, the free encyclopedia£© In linear algebra, the identity matrix, or sometimes ambiguously called a unit matrix, of size n is the n ¡Á n square matrix with ones on the main diagonal and zeros elsewhere. ...... Less frequently, some mathematics books use U or E to represent the identity matrix, meaning "unit matrix"[1] and the German word Einheitsmatrix[2] respectively. ¶Ô±ÈÆäËûÍøÕ¾µÄһЩ´ð°¸£¬Ë³±ãÌùÒ»¸öelemental matrixµÄwiki£¬Ã÷ȷ˵ÁËÓ뵥λ¾ØÕóÊDz»Í¬µÄ¡£µ±È»£¬²»ÅųýÓÐÖÐÎĽ̿ÆÊé»ìÓøÅÄîµÄ Elementary matrix£¨From Wikipedia, the free encyclopedia£© In mathematics, an elementary matrix is a matrix which differs from the identity matrix by one single elementary row operation. ÎÒÀí½âÊÇÖ¸µ¥Î»¾ØÕóÉϽøÐÐÁËÒ»´ÎÐн»»»µÄ²Ù×÷µÃµ½µÄ¾ØÕó¡£ÕâÀïµÄÐн»»»µÄ²Ù×÷°üÀ¨Row switching£¬Row multiplication£¬Row addition¡£Ò²¾ÍÊǽ»»»ÐУ¬±¶ÔöÐУ¬±¶Ôöºó¼Óµ½ÁíÒ»ÐÐʲôµÄ£¬¾ßÌåµÄ²éÔÄÔÎÄ°É |
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