简介:Theestimateoftheeigenvaluesisgivenwhentheoff-diagonalelementsinsymmetrictridiagonalmatrixarereplacedbyzero.TheresultcanbeappliedtoQRorQLalgorithm.ItisageneralizationofJiang’sresultin1987.ThisestimateissharperthanHager’sresultin1982andcouldnotfail
AN ESTIMATE OF EIGENVALUES IN THE SYMMETRIC QR ALGORITHM