發送短信 : Skew-symmetric association schemes with two classes and strongly regular graphs of type L 2n-1(4n-1)

  ______    ______    _____      ___      ______  
 /_   _//  /_   _//  / ____||   / _ \\   /_____// 
 `-| |,-    -| ||-  / //---`'  | / \ ||  `____ `  
   | ||     _| ||_  \ \\___    | \_/ ||  /___//   
   |_||    /_____//  \_____||   \___//   `__ `    
   `-`'    `-----`    `----`    `---`    /_//     
                                         `-`