docs: public static double computeEigenValue(DMatrixRMaj A , DMatrixRMaj eigenVector )
      {
          double bottom = VectorVectorMult_DDRM.innerProd(eigenVector,eigenVector);
          double top = VectorVectorMult_DDRM.innerProdA(eigenVector,A,eigenVector);
  
          return top/bottom;
      }