FUNCTION DET(DUMMY)
C BERECHNET DETERMINATE VON B - DIMENSION N<=16
C MATRIX B : B11,B21,B31,...,BNN IN COMMON
C AUFRUF Z.B. : BDET=DET(DUMMY)
C FORTRAN II
	COMMON N,A,B
	DIMENSION A(272),B(256)
	DET=B(1)
	DO 1005 K=2,N
	MC=K-1+N*(K-2)
	MD=K+N*(K-1)
	DO 1004 I=K,N
	DO 1004 J=K,N
	L=I+N*(J-1)
	MA=I+N*(K-2)
	MB=K-1+N*(J-1)
	IF(B(MC))1003,1001,1003
1001	DET=0.
	GOTO 1008
1003	B(L)=B(L)-B(MA)*B(MB)/B(MC)
1004	CONTINUE
	DET=DET*B(MD)
	IF(DET)1005,1008,1005
1005	CONTINUE
1008	RETURN
	END