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$$$$ YTMX     NOTICE  CHAT      11/09/12    21:18:36     7124           
                                             DATE     11/09/12

    Operateur YTMX                           Voir aussi : XTMX, XTX, XTY
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    FLOT1 = YTMX  CHPO1 CHPO2 RIG1 ;


    Description :
    _____________

    The YTMX operator calculates the application of the bilinear 
 form associated with a stiffness and two fields by points.

    Contents :
    _________

    CHPO1 : field by points (CHPOINT type)

    CHPO2 : field by points (CHPOINT type)

    RIG1  : stiffness matrix (RIGIDITE type)

    FLOT1 : generated object (FLOTTANT type)

    In the case of non symmetric matrix the order of the input
 fields by points is important. The realised operation is :

    CHPO2(transpose)*RIG1*CHPO1


    Remark : 
    The transposition rule which associates the primal unknown Y
    to the dual unknown MX uses the names defined in bdata (CCHAMP)
    (leading to the calculation of : UX*FX + UY*FY + ...). 
    The use of another rule is possible by using the following syntax :
    flot1 = XTY chpo2 (Rig1 * chpo1) lmot1 lmot2;
    where lmot1 and lmot2 are LISTMOTS defined by user.