C. M. I. M. Matthiessen
Christian Matthias Ingemar Martin Matthiessen (born 1956) is a Swedish-born linguist and a leading figure in the systemic functional linguistics (SFL) school, having authored or co-authored more than 100 books, refereed journal articles, and papers in refereed conference proceedings, with contributions to three television programs. One of his major works is Lexicogrammatical cartography (1995), a 700-page study of the grammatical systems of English from the perspective of SFL. He has co-authored a number of books with Michael Halliday.