[ adjective ] recurring again and again
"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 .