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SROT

       SUBROUTINE  SROT (N,SX,INCX,SY,INCY,C,S)
       REAL SX(1),SY(1),STEMP,C,S
       INTEGER I,INCX,INCY,IX,IY,N
 C
 C     APPLIES A PLANE ROTATION.
 C     JACK DONGARRA, LINPACK, 3/11/78.
 C