... London New York Washington, D.C.Ordinary and Partial Differential Equation Routines in C, C++,Fortran, Java®, Maple®, and MATLAB®H .J. Lee and W.E. SchiesserCopyright © 2004 by Chapman ... = ex, and λ and α are positive constants.Equation 1.47 is usually referred to as a Gompertzjan relation. It saysthat the tumor grows more and more slowly with the passage of time, and that ... examples, and we willstate more precisely how the truncation errors of Equations 1.19 and 1.25 varywith h.Note that Equation 1.25 uses the derivative dy/dt averaged at points i and i +1, as...