C PROVEC    SOURCE    CHAT      05/01/13    02:35:14     5004           
      SUBROUTINE PROVEC(A,B,C)                                                  
      IMPLICIT INTEGER(I-N)
      IMPLICIT REAL*8 (A-H,O-Z)                                                 
      DIMENSION A(3),B(3),C(3)                                                  
      C(1)=A(2)*B(3)-B(2)*A(3)                                                  
      C(2)=A(3)*B(1)-A(1)*B(3)                                                  
      C(3)=A(1)*B(2)-A(2)*B(1)                                                  
      RETURN                                                                    
      END