Explicit commutator-scaling error bounds are derived for truncated BCH and Zassenhaus formulas in the skew-adjoint (unitary) setting, generalizing Lie–Trotter and Strang splitting bounds.
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Error bounds for the truncated Baker--Campbell--Hausdorff and Zassenhaus formulas in unitary problems
Explicit commutator-scaling error bounds are derived for truncated BCH and Zassenhaus formulas in the skew-adjoint (unitary) setting, generalizing Lie–Trotter and Strang splitting bounds.