https://www.centerspace.net/doc/NMath/ref/html/M_CenterSpace_NMath_Core_DoubleComplexLowerTriMatrix_op_Implicit_1.htm
DoubleComplexLowerTriMatrix Implicit Conversion (FloatComplexLowerTriMatrix to...
Implicitly converts a FloatComplexLowerTriMatrix instance into a DoubleComplexLowerTriMatrix instance.
implicitconversion