Manual pages | Cast3M

$$$$ RACP     NOTICE  CHAT      11/09/12    21:17:49     7124           
                                             DATE     11/09/12

  Operateur RACPOL                         Voir aussi :
    ----------------   
      XR1 ( XI2)  = RACPOL |(MOT1)   | LISTREE1 ( MOT1 )    ||;
                           |         | A0  A1  A2  (A3) (A4)||  
                           | 'INTE' X1 X2 LISTREE1           |
                             

    Description :
    _____________

    The RACPOL operator calculates  roots of a polynom of 
    degree N.

      Comments :
      ---------

      The polynom is as follows :
 
             A0 + A1*X + (A2*X**2) + (A3*X**3) + (A4*X**4) + ... 
      with A0 the first value of the listreel object LISTREE1, A1 the
      second value etc...

      The real parts of roots are in the XR1 listreel object and they
      are ordrered in crescent order. If MOT1 is set to IMAGINARY all
      roots are given with their real parts in XR1 and the imaginary 
      parts in XI2.  
        

      The word MOT1 can be also set to 'BAIRSTOW' which ask to use the 
      Bairstow's method.

      With the second syntaxe only real roots are given.
 
      L'option 'INTE' ask for the first real root in the interval X1 X2.
      If there is no root XR1 take the value 'VIDE'.