發送短信 : Coupled coincidence point theorems for (φ; ψ)-contractive mixed monotone mapping in partially ordered metric spaces

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