Frazer, Robert Alexander Elementary matrices and some applications to dynamics and differential equations / by R. A. Frazer, W. J. Duncan and A. R. Collar - Cambridge : Cambridge University Press ; New York : MacMillan, 1946 - xvi, 415 p. Subjects--Topical Terms: MATEMATICASMATEMATICA APLICADAALGEBRAMATRICESECUACIONES DIFERENCIALES Universal Decimal Class. No.: 512.83