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Functions | |
FLA_Error | FLA_Lyap_n_unb_var4 (FLA_Obj isgn, FLA_Obj A, FLA_Obj C) |
References FLA_Axpys(), FLA_Cont_with_3x3_to_2x2(), FLA_Copyrt(), FLA_Copyt(), FLA_Her2(), FLA_Inv_scal(), FLA_MINUS_ONE, FLA_Mult_add(), FLA_Obj_create(), FLA_Obj_create_conf_to(), FLA_Obj_datatype(), FLA_Obj_free(), FLA_Obj_length(), FLA_Obj_shift_diagonal(), FLA_ONE, FLA_Part_2x2(), FLA_Repart_2x2_to_3x3(), FLA_Scal(), and FLA_Trsv().
Referenced by FLA_Lyap_n().
{ FLA_Obj ATL, ATR, A00, a01, A02, ABL, ABR, a10t, alpha11, a12t, A20, a21, A22; FLA_Obj CTL, CTR, C00, c01, C02, CBL, CBR, c10t, gamma11, c12t, C20, c21, C22; FLA_Obj WTL, WTR, W00, w01, W02, WBL, WBR, w10t, omega11, w12t, W20, w21, W22; FLA_Obj W, omega; FLA_Scal( isgn, C ); FLA_Obj_create_conf_to( FLA_NO_TRANSPOSE, A, &W ); FLA_Obj_create( FLA_Obj_datatype( A ), 1, 1, 0, 0, &omega ); FLA_Part_2x2( A, &ATL, &ATR, &ABL, &ABR, 0, 0, FLA_BR ); FLA_Part_2x2( C, &CTL, &CTR, &CBL, &CBR, 0, 0, FLA_BR ); FLA_Part_2x2( W, &WTL, &WTR, &WBL, &WBR, 0, 0, FLA_BR ); while ( FLA_Obj_length( CTL ) > 0 ){ FLA_Repart_2x2_to_3x3( ATL, /**/ ATR, &A00, &a01, /**/ &A02, &a10t, &alpha11, /**/ &a12t, /* ************* */ /* ************************** */ ABL, /**/ ABR, &A20, &a21, /**/ &A22, 1, 1, FLA_TL ); FLA_Repart_2x2_to_3x3( CTL, /**/ CTR, &C00, &c01, /**/ &C02, &c10t, &gamma11, /**/ &c12t, /* ************* */ /* ************************** */ CBL, /**/ CBR, &C20, &c21, /**/ &C22, 1, 1, FLA_TL ); FLA_Repart_2x2_to_3x3( WTL, /**/ WTR, &W00, &w01, /**/ &W02, &w10t, &omega11, /**/ &w12t, /* ************* */ /* ************************** */ WBL, /**/ WBR, &W20, &w21, /**/ &W22, 1, 1, FLA_TL ); /*------------------------------------------------------------*/ // gamma11 = gamma11 / ( alpha11 + alpha11' ); FLA_Copyt( FLA_CONJ_NO_TRANSPOSE, alpha11, omega ); FLA_Mult_add( FLA_ONE, alpha11, omega ); FLA_Inv_scal( omega, gamma11 ); // c01 = c01 - a01 * gamma11; FLA_Axpys( FLA_MINUS_ONE, gamma11, a01, FLA_ONE, c01 ); // c01 = inv( triu(A00) + conj(alpha) * I ) * c01; FLA_Copyrt( FLA_UPPER_TRIANGULAR, FLA_NO_TRANSPOSE, A00, W00 ); FLA_Obj_shift_diagonal( FLA_CONJUGATE, alpha11, W00 ); FLA_Trsv( FLA_UPPER_TRIANGULAR, FLA_NO_TRANSPOSE, FLA_NONUNIT_DIAG, W00, c01 ); // C00 = C00 - a01 * c01' - c01 * a01'; FLA_Her2( FLA_UPPER_TRIANGULAR, FLA_MINUS_ONE, a01, c01, C00 ); /*------------------------------------------------------------*/ FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR, A00, /**/ a01, A02, /* ************** */ /* ************************ */ a10t, /**/ alpha11, a12t, &ABL, /**/ &ABR, A20, /**/ a21, A22, FLA_BR ); FLA_Cont_with_3x3_to_2x2( &CTL, /**/ &CTR, C00, /**/ c01, C02, /* ************** */ /* ************************ */ c10t, /**/ gamma11, c12t, &CBL, /**/ &CBR, C20, /**/ c21, C22, FLA_BR ); FLA_Cont_with_3x3_to_2x2( &WTL, /**/ &WTR, W00, /**/ w01, W02, /* ************** */ /* ************************ */ w10t, /**/ omega11, w12t, &WBL, /**/ &WBR, W20, /**/ w21, W22, FLA_BR ); } FLA_Obj_free( &W ); FLA_Obj_free( &omega ); return FLA_SUCCESS; }