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  ____      ______    _  _      ___      _____   
 |  _ \\   /_   _//  | \| ||   / _ \\   / ____|| 
 | |_| ||   -| ||-   |  ' ||  | / \ || / //---`' 
 | .  //    _| ||_   | .  ||  | \_/ || \ \\___   
 |_|\_\\   /_____//  |_|\_||   \___//   \_____|| 
 `-` --`   `-----`   `-` -`    `---`     `----`

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發送短信 : SKEW-SYMMETRIC MATRICES AND PFAFFIANS