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$$$$ DANS     NOTICE  BP208322  11/11/30    21:15:01     7194           
                                             DATE     11/11/30

    Operateur DANS                            Voir aussi : EXIS
    --------------   
    LOG1 = DANS   |   LECT1        LECT2                |
                  |   LISTREE1     RE1                  |
                  |   POINT1       MELE1                |
                  |   | ('SEQU' )| LISTREE1 LISTREE2    |
                  |   |  'QUEL'  |                      |
                  
                  
                  

    Description :
    _____________

   a)  The DANS operator builds a logical LOG1 which is VRAI if the LISTENTI
       LECT1 is a part of the LISTENTI LECT2 and FALSE otherwise.

       Let us set p the size of LECT1 and q the one of LECT2, then to have LECT1
       a part of LECT2, it must exist n so that the 1 ... p values of LECT1 are
       identical to the n*p+1 ... (n+1)*p values of LECT2
  
   b)  The DANS operator builds a logical LOG1 which is VRAI if the real value
       RE1 is one of the value of the list of LISTREE1. The precision is functio
       (*1.e-8) of the smallest difference between two consecutives values of
       the list.
 
   c) The DANS operator builds a logical LOG1 which is VRAI if the
      point POINT1 belongs to the nodes of the geometrical object MELE1.
      
   d) word SEQU : The DANS operator builds a logical LOG1 which is VRAI (true)
                  if the the listreel1 is a part of listreel2
                
   e) word QUEL : The DANS operator builds a logical LOG1 which is VRAI (true)
                  if each element of listreel1 exists in listreel2