The shooting method is said to converge if the root-finding algorithm results in asequence {sn}∞n=0 which converges to a root s of G; then s = y(a) where y(x) is thedesired solution of the boundary value problem (104). The convergence of this sequenceand therefore the success of the shooting method may be hampered by two effects:1) A well-conditioned boundary value problem of the form (104) may easily lead to anill-posed initial value problem (104);2) A bounded solution to the initial value problem (104) may exist only for s in a smallneighbourhood of y(s) (which, of course, in unknown).The idea behind the multiple shooting method is to divide the interval [a, b] intosmaller subintervalsa = x0 < x1 < · · · < xK−1 < xK = b ; (107)the problem then is to find a vector ST = (sT0, . . . , sTK−1) such that the solutions uk(x; sk)of the initial value problems
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