The [D] [x] = [E] system of equations was then solved, as explained 

 previously, by solving the x column vector (which represents the changes in 

 the unknowns, aA, Aydeli ... AydeliM^X ^^^' adding these changes to the 

 respective variables and iterating until a final solution is obtained. 



The computer program which did these calculations for the Channel Island 

 Harbor simulation follows. A user-supplied matrix inversion routine is 

 required (Line 37,200). 



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