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  ______     ___     _    _      ___       _____  
 /_____//   / _ \\  | \  / ||   / _ \\    / ___// 
 `____ `   | / \ || |  \/  ||  | / \ ||   \___ \\ 
 /___//    | \_/ || | .  . ||  | \_/ ||   /    // 
 `__ `      \___//  |_|\/|_||   \___//   /____//  
 /_//       `---`   `-`  `-`    `---`   `-----`   
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發送短信 : SINGULAR CONTROLS IN LINEAR SYSTEMS WITH QUADRATIC COSTS