Describir: Proceedings of the fourth International Conference of Mathematics & Design 2004 /

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