أرسل هذا في رسالة قصيرة: NUMERICAL SOLUTIONS OF NATURAL CONVECTION IN A SQUARE CAVITY BY GENERALISED DIFFERENTIAL QUADRATURE

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