Media type: E-Article Title: An editorial Contributor: von zur Gathen, Joachim imprint: Springer Science and Business Media LLC, 1991 Published in: computational complexity Language: English DOI: 10.1007/bf01200055 ISSN: 1016-3328; 1420-8954 Keywords: Computational Mathematics ; Computational Theory and Mathematics ; General Mathematics ; Theoretical Computer Science Origination: Footnote: