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Functions | |
FLA_Error | FLA_Eig_gest_il_unb_var3 (FLA_Obj A, FLA_Obj Y, FLA_Obj B) |
References FLA_Axpy_external(), FLA_Cont_with_3x3_to_2x2(), FLA_Copy_external(), FLA_Dot2cs_external(), FLA_Gemvc_external(), FLA_Ger_external(), FLA_Inv_scal_external(), FLA_MINUS_ONE, FLA_MINUS_ONE_HALF, FLA_Obj_length(), FLA_ONE, FLA_Part_2x2(), FLA_Repart_2x2_to_3x3(), and FLA_Scal_external().
Referenced by FLA_Eig_gest_il().
{ FLA_Obj ATL, ATR, A00, a01, A02, ABL, ABR, a10t, alpha11, a12t, A20, a21, A22; FLA_Obj BTL, BTR, B00, b01, B02, BBL, BBR, b10t, beta11, b12t, B20, b21, B22; FLA_Obj YTL, YTR, Y00, y01, Y02, YBL, YBR, y10t, psi11, y12t, Y20, y21, Y22; FLA_Part_2x2( A, &ATL, &ATR, &ABL, &ABR, 0, 0, FLA_TL ); FLA_Part_2x2( B, &BTL, &BTR, &BBL, &BBR, 0, 0, FLA_TL ); FLA_Part_2x2( Y, &YTL, &YTR, &YBL, &YBR, 0, 0, FLA_TL ); while ( FLA_Obj_length( ATL ) < FLA_Obj_length( A ) ){ FLA_Repart_2x2_to_3x3( ATL, /**/ ATR, &A00, /**/ &a01, &A02, /* ************* */ /* ************************** */ &a10t, /**/ &alpha11, &a12t, ABL, /**/ ABR, &A20, /**/ &a21, &A22, 1, 1, FLA_BR ); FLA_Repart_2x2_to_3x3( BTL, /**/ BTR, &B00, /**/ &b01, &B02, /* ************* */ /* ************************* */ &b10t, /**/ &beta11, &b12t, BBL, /**/ BBR, &B20, /**/ &b21, &B22, 1, 1, FLA_BR ); FLA_Repart_2x2_to_3x3( YTL, /**/ YTR, &Y00, /**/ &y01, &Y02, /* ************* */ /* ************************ */ &y10t, /**/ &psi11, &y12t, YBL, /**/ YBR, &Y20, /**/ &y21, &Y22, 1, 1, FLA_BR ); /*------------------------------------------------------------*/ // a10t = a10t - 1/2 * y10t; FLA_Axpy_external( FLA_MINUS_ONE_HALF, y10t, a10t ); // alpha11 = alpha11 - a10t * b10t' - b10t * a10t'; FLA_Dot2cs_external( FLA_CONJUGATE, FLA_MINUS_ONE, a10t, b10t, FLA_ONE, alpha11 ); // alpha11 = inv(beta11) * alpha11 * inv(conj(beta11)); // = inv(beta11) * alpha11 * inv(beta11); FLA_Inv_scal_external( beta11, alpha11 ); FLA_Inv_scal_external( beta11, alpha11 ); // a21 = a21 - A20 * b10t'; FLA_Gemvc_external( FLA_NO_TRANSPOSE, FLA_CONJUGATE, FLA_MINUS_ONE, A20, b10t, FLA_ONE, a21 ); // a21 = a21 * inv(conj(beta11)); // = a21 * inv(beta11); FLA_Inv_scal_external( beta11, a21 ); // a10t = a10t - 1/2 * y10t; FLA_Axpy_external( FLA_MINUS_ONE_HALF, y10t, a10t ); // a10t = inv(beta11) * a10t; FLA_Inv_scal_external( beta11, a10t ); // Y20 = Y20 + b21 * a10t; FLA_Ger_external( FLA_ONE, b21, a10t, Y20 ); // y21 = b21 * alpha11; FLA_Copy_external( b21, y21 ); FLA_Scal_external( alpha11, y21 ); // y21 = y21 + B20 * a10t'; FLA_Gemvc_external( FLA_NO_TRANSPOSE, FLA_CONJUGATE, FLA_ONE, B20, a10t, FLA_ONE, y21 ); /*------------------------------------------------------------*/ FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR, A00, a01, /**/ A02, a10t, alpha11, /**/ a12t, /* ************** */ /* ************************ */ &ABL, /**/ &ABR, A20, a21, /**/ A22, FLA_TL ); FLA_Cont_with_3x3_to_2x2( &BTL, /**/ &BTR, B00, b01, /**/ B02, b10t, beta11, /**/ b12t, /* ************** */ /* *********************** */ &BBL, /**/ &BBR, B20, b21, /**/ B22, FLA_TL ); FLA_Cont_with_3x3_to_2x2( &YTL, /**/ &YTR, Y00, y01, /**/ Y02, y10t, psi11, /**/ y12t, /* ************** */ /* ********************** */ &YBL, /**/ &YBR, Y20, y21, /**/ Y22, FLA_TL ); } return FLA_SUCCESS; }