發送短信 : A note on equilibria for abstract economies

             ___     _    _      ___     ______   
  ____      / _ \\  | || | ||   / _ \\  |      \\ 
 |    \\   | / \ || | || | ||  | / \ || |  --  // 
 | [] ||   | \_/ || | \\_/ ||  | \_/ || |  --  \\ 
 |  __//    \___//   \____//    \___//  |______// 
 |_|`-`     `---`     `---`     `---`   `------`  
 `-`