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[ adjective ] recurring again and again
Examples "perennial efforts to stipulate the requirements" Used in print (Jaroslav Pelikan, The Shape of Death: life, death and...)The repeated efforts in Christian history to describe death as altogether the consequence of human sin show that these two aspects of death cannot be separated . (J. W. C. Hagstrom et al., "Debilitating muscular...)Repeated attempts to withdraw steroids entirely were unsuccessful because increased muscle weakness resulted , as_well_as fever , malaise , anorexia , anxiety , and an exacerbation of the anemia . (E. Gellhorn, "Prolegomena to a theory of the emotions"...)In other studies , loss of differentiation in previously established conditioned_reflexes resulted from repeated convulsive ( metrazol ) treatments , suggesting a fundamental disturbance in the balance between excitatory and inhibitory cerebral processes . (Kenneth Hoffman and Ray Kunze, Linear Al...)Such an operator is obviously the zero operator ; for since it is nilpotent , the minimal polynomial for this operator is of the form * * f for some * * f ; but then since the operator is diagonalizable , the minimal polynomial cannot have a repeated root ; hence * * f and the minimal polynomial is simply x , which says the operator is 0 . Related terms 
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