Show 10 5 10 15 20 50 100 250 Sort by year (new to old) Actions Download search results Subscribe to news feed Your filters: cql: author="Sangwine, Stephen" or (type exact bookEditor and editor="Sangwine, Stephen") Add to list Journal Article A1 open access Connecting spatial and frequency domains for the quaternion Fourier transform Hendrik De Bie (UGent) , Nele De Schepper, Todd Ell, Klaus Rubrecht and Stephen Sangwine (2015) APPLIED MATHEMATICS AND COMPUTATION. 271. p.581-593 Add to list Book Chapter open access History of quaternion and Clifford-fourier transforms and wavelets Fred Brackx (UGent) , Eckhard Hitzer and Stephen Sangwine (2013) Quaternion and Clifford fourier transforms and wavelets. In Trends in Mathematics 27. p.XI-XXVII