/// <summary>
/// Initializes submatrices of the given <see cref="AdmittanceMatrix"/>
/// </summary>
/// <param name="matrix"></param>
private void InitializeSubmatrices(AdmittanceMatrix matrix)
{
matrix._A = ArrayHelpers.CreateAndInitialize(Complex.Zero, _BigDimension, _BigDimension);
matrix._B = ArrayHelpers.CreateAndInitialize <Complex>(0, _BigDimension, _SmallDimension);
matrix._C = ArrayHelpers.CreateAndInitialize(Complex.Zero, _SmallDimension, _BigDimension);
matrix._D = ArrayHelpers.CreateAndInitialize(Complex.Zero, _SmallDimension, _SmallDimension);
matrix._E = ArrayHelpers.CreateAndInitialize(Complex.Zero, _SmallDimension);
matrix._I = ArrayHelpers.CreateAndInitialize(Complex.Zero, _BigDimension);
}