Consider two simul tan eous first ordcr diffcrenti al cqu a,t ions x' (I) = " '(x ,y, l ), y' (I) = G(x,y,l). Runge-Kut ta type in tegration m ethods are developed which allow differenL in tegration steps to be used for t hese equ at ions. These methods retain t he desirabl e properLies of Runge-Kutta methods, na mely t he self-starting property an d case of cha ngc of integnLtioJl step. Two differen t approaches a rc considered and extensive experimental work is reported upon. Experiments a re… CONTINUE READING