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Exact computation of the 3-f and 6-f symbols - iucaa

Exact computation of the 3-f and 6-f symbols - iucaa

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360 S.-T Lai, Y -N. Chiu / <strong>Exact</strong> <strong>computation</strong> <strong>of</strong> <strong>the</strong> 3-f <strong>and</strong> 6-f <strong>symbols</strong><br />

20 RETURN 15 CONTINUE<br />

END<br />

RETURN<br />

C<br />

END<br />

SUBROUTINE PBIMi(Qit C<br />

IMPLICIT REALB)A—U,O—I) SUBROUTINE PRIME)DIA,QK,BB)<br />

INTEOER*2 Qi(11S) IMPLICIT REALO(A—N,O—Z)<br />

LOGICAL KR INTEGER’S Qi)liS),LY<br />

Qi(i)—2 REALi6 DIA.DY3,QE<br />

NI2 LOGICAL LL,LQ<br />

00101—3,601 DIMENSION PP)ii0)<br />

DO 25 3—2,1—i COMMON/PRI/Q1,PP<br />

KK—ABS(FL0AT(I/))—FLOAT(I)/FLOAT~fl).LT.i.0E—5<br />

LY—0<br />

IF(EE) GOTO iS LM1<br />

20 CONTINUE DIA—QINT)DEA+.5Q5)<br />

Qi(NI)—I 15 IF)LM.OT.LY) LYLM<br />

NI—N1+i IF)DIA.EQ.i.558.OR.DIA.EQ.0.SQO) 001040<br />

iO CONTINUE IF)01)LM).EQ.0) QKDIA<br />

RETURN IF)Q1(LM).EQ.0) 001040<br />

END SO DT3DEA/QFLOAT)Qi)LM))<br />

C<br />

LQ.QABS(DT3—i.000).LT.i.OQ—5<br />

SUBROUTINE DECOM)Li,QE.R9) IF)LQ) PP)LM)—PP)LM)+R9<br />

IMPLICIT REALB)A—U.O—Z) IF)LQ) 001040<br />

REAL’16 DIA,DT3.QE LL.QABS(D13—QINT)DY3*.SQO)).LT. 1.SQ—iO<br />

INTEOERS Qi)iio) IF)LL) PP)LM)—PP)LM)+R9<br />

DIMENSION PP)uio) IF)LL) DIA:DY3<br />

COMMON/PRI/Ql,PP IF)LL) 0010 50<br />

IF(Li.EQ.0.OR.Li .EQ.i) RETURN LMLM+i<br />

DO 10 LEi.Li 0010 10<br />

DIA—QFLOAT)LK) 40 RETURN<br />

CALL PRIME)DIA.QK,R9) END<br />

References<br />

[11 M. Rotenberg, R. Bivins, N. Metropolis <strong>and</strong> J.K. Wooten Jr.. The 3-f <strong>and</strong> 6-f Symbols (The Technology Press. MIT, Cambridge,<br />

MA, ~959).<br />

[2] K. Schulten <strong>and</strong> R.G. Gordon, J. Math. Phys. 16 (1975) 1961; Comput. Phys. Commun. 11(1976) 269.<br />

[3] RN. Zare, Angular Momentum (Wiley, New York, 1988).

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