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Contents

I.	Introduction
II.	A General Unitary Integrator A. Computing Matrix Exponentials
III.	Example
IV.	Numerical Results A. Numerical Solutions B. Error in the Numerical Solution C. Error in the Trace Invariants D. Global Truncation Error E. Discussion
V.	Conclusions
VI.	References

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Your comments or questions are welcome; please contact B. A. Shadwick: shadwick@hagar.ph.utexas.edu