Half Rotations in N-Dimensional Euclidean Space An iterative procedure is described for determining half rotations in n-dimensional Euclidean space. The method is a variant of the cyclic Jacobi procedure and utilizers elementary plane rotations to obtain the half rotation matrix. Numerical examples are given. CACM September, 1966 McCamon, R. B. CA660910 JB March 2, 1978 4:32 PM 1369 5 1369 1369 5 1369 1369 5 1369 1961 5 1369 1369 6 1369 1504 6 1369 1847 6 1369