Text ( visual ) : unmediated Relational mathematics / Gunther Schmidt. -- : hardback. -- Cambridge ; Tokyo : Cambridge University Press , 2011. -- xiii, 567 p. : ill., ports. ; 24 cm. -- (Encyclopedia of mathematics and its applications / edited by G.-C. Rota ; 132). -- Includes bibliographical references (p. [549]-557) and index. -- ISBN 9780521762687 ; (BB03879365) ; https://ci.nii.ac.jp/ncid/BB03879365 Author Heading(s): Schmidt, Gunther. -- Classification(s): DC22 : 004.0151. -- Subject Heading(s): LCSH : Computer science -- Mathematics ; LCSH : Operations research -- Mathematics