public static int iamax(RowVector256 <double> X) => (int)CBLAS.cblas_idamax(X.Length, ref head(X), 1);
public static int iamax(BlockVector <double> X) => (int)CBLAS.cblas_idamax(X.Length, ref head(X), 1);
public static int iamax(RowVector256 <double> X) => (int)CBLAS.cblas_idamax(X.Length, ref head(X), 1);
public static int iamax(BlockVector <double> X) => (int)CBLAS.cblas_idamax(X.Length, ref head(X), 1);