Ian Jauslin
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+## This computes the logarithm of the flow equation
+
+#!fields
+# extrenal fields: xy0 where x=alpha, y=sigma
+x:110,120,210,220
+# internal fields: xy1 where x=alpha, y=sigma
+i:111,121,211,221
+# all are Fermions
+f:110,120,210,220,111,121,211,221
+
+&
+#!groups
+# different spins are independent
+(111,211) (121,221)
+
+&
+#!preprocessor_variables
+
+# psi's with internal fields
+psiAU=(1/2)[f110]+[f111],
+psiAD=(1/2)[f120]+[f121],
+psiBU=(1/2)[f210]+[f211],
+psiBD=(1/2)[f220]+[f221],
+
+psiAU-=(1/2)[f-110]+[f-111],
+psiAD-=(1/2)[f-120]+[f-121],
+psiBU-=(1/2)[f-210]+[f-211],
+psiBD-=(1/2)[f-220]+[f-221],
+
+# operators with internal fields
+O0=
+<<$psiAU>*<$psiBU->>+
+<<$psiBU>*<$psiAU->>+
+<<$psiAD>*<$psiBD->>+
+<<$psiBD>*<$psiAD->>,
+
+O1=
+<<$psiAU>*<$psiAU->*<$psiAD>*<$psiAD->>+
+<<$psiBU>*<$psiBU->*<$psiBD>*<$psiBD->>,
+
+O2=
+<<$psiAU>*<$psiAD->*<$psiBD>*<$psiBU->>+
+<<$psiBU>*<$psiBD->*<$psiAD>*<$psiAU->>+
+<<$psiAD>*<$psiAU->*<$psiBU>*<$psiBD->>+
+<<$psiBD>*<$psiBU->*<$psiAU>*<$psiAD->>,
+
+O3=
+<<$psiAU>*<$psiAU->*<$psiBU>*<$psiBU->>+
+<<$psiAD>*<$psiAD->*<$psiBD>*<$psiBD->>,
+
+O4=
+<<$psiAU>*<$psiBU->*<$psiAD>*<$psiBD->>+
+<<$psiBU>*<$psiAU->*<$psiBD>*<$psiAD->>,
+
+O5=
+<<$psiAU>*<$psiAU->*<$psiAD>*<$psiBU->*<$psiBU>*<$psiBD->>+
+<<$psiAD>*<$psiAD->*<$psiAU>*<$psiBD->*<$psiBD>*<$psiBU->>+
+<<$psiBU>*<$psiBU->*<$psiBD>*<$psiAU->*<$psiAU>*<$psiAD->>+
+<<$psiBD>*<$psiBD->*<$psiBU>*<$psiAD->*<$psiAD>*<$psiAU->>,
+
+O6=<<$psiAU>*<$psiAU->*<$psiAD>*<$psiAD->*<$psiBU>*<$psiBU->*<$psiBD>*<$psiBD->>,
+
+
+# psi's without internal fields
+phiAU=[f110],
+phiAD=[f120],
+phiBU=[f210],
+phiBD=[f220],
+
+phiAU-=[f-110],
+phiAD-=[f-120],
+phiBU-=[f-210],
+phiBD-=[f-220],
+
+# operators without internal fields
+E0=
+<<$phiAU>*<$phiBU->>+
+<<$phiBU>*<$phiAU->>+
+<<$phiAD>*<$phiBD->>+
+<<$phiBD>*<$phiAD->>,
+
+E1=
+<<$phiAU>*<$phiAU->*<$phiAD>*<$phiAD->>+
+<<$phiBU>*<$phiBU->*<$phiBD>*<$phiBD->>,
+
+E2=
+<<$phiAU>*<$phiAD->*<$phiBD>*<$phiBU->>+
+<<$phiBU>*<$phiBD->*<$phiAD>*<$phiAU->>+
+<<$phiAD>*<$phiAU->*<$phiBU>*<$phiBD->>+
+<<$phiBD>*<$phiBU->*<$phiAU>*<$phiAD->>,
+
+E3=
+<<$phiAU>*<$phiAU->*<$phiBU>*<$phiBU->>+
+<<$phiAD>*<$phiAD->*<$phiBD>*<$phiBD->>,
+
+E4=
+<<$phiAU>*<$phiBU->*<$phiAD>*<$phiBD->>+
+<<$phiBU>*<$phiAU->*<$phiBD>*<$phiAD->>,
+
+E5=
+<<$phiAU>*<$phiAU->*<$phiAD>*<$phiBU->*<$phiBU>*<$phiBD->>+
+<<$phiAD>*<$phiAD->*<$phiAU>*<$phiBD->*<$phiBD>*<$phiBU->>+
+<<$phiBU>*<$phiBU->*<$phiBD>*<$phiAU->*<$phiAU>*<$phiAD->>+
+<<$phiBD>*<$phiBD->*<$phiBU>*<$phiAD->*<$phiAD>*<$phiAU->>,
+
+E6=<<$phiAU>*<$phiAU->*<$phiAD>*<$phiAD->*<$phiBU>*<$phiBU->*<$phiBD>*<$phiBD->>
+
+&
+#!propagator
+111;211: 1 ,121;221: 1 ,
+211;111: 1 ,221;121: 1
+
+&
+#!input_polynomial
+<%exp<
+ <<[l0]>*<$O0>>+
+ <<[l1]>*<$O1>>+
+ <<[l2]>*<$O2>>+
+ <<[l3]>*<$O3>>+
+ <<[l4]>*<$O4>>+
+ <<[l5]>*<$O5>>+
+ <<[l6]>*<$O6>>
+>>
+
+&
+#!postprocess_flow_equation
+<<8>*<%log_1<$FLOW>>>
+
+&
+#!id_table
+0: <$E0>,
+1: <$E1>,
+2: <$E2>,
+3: <$E3>,
+4: <$E4>,
+5: <$E5>,
+6: <$E6>
+
+&
+#!labels
+
+0:"O0" ,
+1:"O1" ,
+2:"O2" ,
+3:"O3" ,
+4:"O4" ,
+5:"O5" ,
+6:"O6"