Describir: The proceedings of Mathematics & Design 2001 :

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