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PROGRAM exmpl1
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INTEGER N1,N2,N3
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PARAMETER (N1=256,N2=256,N3=1)
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CU USES rlft3
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REAL data(N1,N2)
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COMPLEX spec(N1/2,N2),speq(N2)
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EQUIVALENCE (data,spec)
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C ...
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call rlft3(data,speq,N1,N2,N3,1)
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C ...
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call rlft3(data,speq,N1,N2,N3,-1)
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C ...
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END
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PROGRAM exmpl2
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INTEGER N1,N2,N3
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PARAMETER (N1=32,N2=64,N3=16)
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CU USES rlft3
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REAL data(N1,N2,N3)
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COMPLEX spec(N1/2,N2,N3),speq(N2,N3)
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EQUIVALENCE (data,spec)
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C ...
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call rlft3(data,speq,N1,N2,N3,1)
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C ...
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END
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PROGRAM exmpl3
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INTEGER N
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PARAMETER (N=32)
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CU USES rlft3
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INTEGER j
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REAL fac,data1(N,N,N),data2(N,N,N)
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COMPLEX spec1(N/2,N,N),speq1(N,N),spec2(N/2,N,N),speq2(N,N),
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*zpec1(N*N*N/2),zpeq1(N*N),zpec2(N*N*N/2),zpeq2(N*N)
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EQUIVALENCE (data1,spec1,zpec1), (data2,spec2,zpec2),(speq1,
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*zpeq1), (speq2,zpeq2)
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C ...
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call rlft3(data1,speq1,N,N,N,1)
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call rlft3(data2,speq2,N,N,N,1)
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fac=2./(N*N*N)
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do 11 j=1,N*N*N/2
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zpec1(j)=fac*zpec1(j)*zpec2(j)
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11 continue
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do 12 j=1,N*N
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zpeq1(j)=fac*zpeq1(j)*zpeq2(j)
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12 continue
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call rlft3(data1,speq1,N,N,N,-1)
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C ...
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END
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