++ Reduction Algorithms
+Event analysis yields time correction factors between trace pairs. For groups
+of more than two traces, an extra step is necessary to identify a reference
+trace and calculate correction factors for each trace relative to this
+reference. There are usually many possibilities and so this step is called
+"factor reduction".
+
+++ Accuracy
+At the moment, only one algorithm is available to do this, the "accuracy"
+algorithm. This algorithm tries to choose the reference and the factors that
+yield the best accuracy. See the function header comments in
+factor_reduction_accuracy.c for more details.
+