Welcome to the 1520 Perfect Dictionary
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| Identity matrix | |
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| IDENTITY MATRIX Definition: (mathematics) A square matrix in which the principal diagonal is 1 and all other entities are 0. ___________________________________ See perfect matrix (1). See perfect particularity (1). See perfect type (1). | |
1520 Products |
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1520 Products was established in 2005 with the purpose of entertaining and teaching us on key and important aspects of life (such as marriage, sex, etc) through the playing of games which will allow us to laugh but at the same time pass a message of what is the right or ideal way. |
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 1520 Sex Game |
 1520 Puzzles |
 1520 Marriage Game |