public LocalTrivialization(Parametrization chart, PushForward pushForward, RiemannianSpace chartDomain) :
     base(chartDomain.Dim, chartDomain.Metric)
 {
     LocalMetric = PullBack(chart, pushForward);
 }
 public RiemannianSpace(int dim, MetricTensor metric)
 {
     Dim    = dim;
     Metric = metric;
 }