These Thurston maps are NET maps for every choice of translation term. They are primitive and have degree 27. PURE MODULAR GROUP HURWITZ EQUIVALENCE CLASSES FOR TRANSLATIONS {0} {lambda1} {lambda2} {lambda1+lambda2} These pure modular group Hurwitz classes each contain only finitely many Thurston equivalence classes. However, this modular group Hurwitz class contains infinitely many Thurston equivalence classes. The number of pure modular group Hurwitz classes in this modular group Hurwitz class is 24. ALL THURSTON MULTIPLIERS c/d IN UNREDUCED FORM 0/1, 0/3, 0/9, 0/27, 1/27, 1/9, 1/3, 2/3, 1/1, 3/3, 4/3, 5/3, 2/1, 6/3, 3/1 4/1, 5/1, 6/1, 7/1, 11/1, 12/1, 13/1, 14/1, 15/1, 17/1, 22/1 EXCLUDED INTERVALS FOR THE HALF-SPACE COMPUTATION (-infinity,-1.379678) (-1.374826,-1.343876) (-1.343017,-1.342703) (-1.331171,-1.300111) (-1.297072,-1.295487) (-1.295160,-1.236972) (-1.235822,infinity ) The half-space computation does not determine rationality. EXCLUDED INTERVALS FOR JUST THE SUPPLEMENTAL HALF-SPACE COMPUTATION INTERVAL COMPUTED FOR HST OR EXTENDED HST (-1.380952,-1.379085) -40/29 EXTENDED HST -> HST (-1.379736,-1.376228) -51/37 HST (-1.377528,-1.374632) -150/109 HST (-1.375556,-1.374443) -11/8 EXTENDED HST (-1.343881,-1.343838) -340/253 HST (-1.344421,-1.343280) -512/381 HST (-1.343757,-1.343743) -43/32 EXTENDED HST (-1.344317,-1.342145) -137/102 HST (-1.342342,-1.341880) -51/38 HST (-1.346806,-1.337629) -55/41 HST (-1.339694,-1.335851) -107/80 HST (-1.338285,-1.333791) -179/134 HST (-1.334936,-1.331768) -4/3 EXTENDED HST (-1.332068,-1.330518) -217/163 HST (-1.331263,-1.331237) -213/160 HST (-1.331218,-1.331202) -209/157 HST (-1.300216,-1.299785) -13/10 EXTENDED HST (-1.299896,-1.299614) -529/407 HST (-1.299753,-1.299635) -438/337 HST (-1.299698,-1.299552) -347/267 HST (-1.299611,-1.299422) -269/207 HST (-1.299502,-1.298230) -87/67 HST (-1.298303,-1.297431) -61/47 HST (-1.297475,-1.297320) -301/232 HST (-1.297360,-1.297235) -48/37 EXTENDED HST (-1.297236,-1.296821) -179/138 HST (-1.296296,-1.294574) -57/44 HST (-1.237364,-1.235717) -47/38 EXTENDED HST -> HST The supplemental half-space computation shows that these NET maps are rational. SLOPE FUNCTION INFORMATION There are no slope function fixed points. Number of excluded intervals computed by the fixed point finder: 7378 No nontrivial cycles were found. The slope function maps some slope to the nonslope. The slope function orbit of every slope p/q with |p| <= 50 and |q| <= 50 ends in the nonslope. FUNDAMENTAL GROUP WREATH RECURSIONS When the translation term of the affine map is 0: NewSphereMachine( "a=(2,27)(3,26)(4,25)(5,24)(6,23)(7,22)(8,21)(9,20)(10,19)(11,18)(12,17)(13,16)(14,15)", "b=(1,27)(2,26)(3,25)(4,24)(5,23)(6,22)(7,21)(8,20)(9,19)(10,18)(11,17)(12,16)(13,15)", "c=(1,27)(2,26)(3,25)(4,24)(5,23)(6,22)(7,21)(8,20)(9,19)(10,18)(11,17)(12,16)(13,15)", "d=<1,a*b,a*b,a*b,c^-1,c^-1,c^-1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,c,c,c,c*d,c*d,c*d>(2,27)(3,26)(4,25)(5,24)(6,23)(7,22)(8,21)(9,20)(10,19)(11,18)(12,17)(13,16)(14,15)", "a*b*c*d"); When the translation term of the affine map is lambda1: NewSphereMachine( "a=(1,2)(3,27)(4,26)(5,25)(6,24)(7,23)(8,22)(9,21)(10,20)(11,19)(12,18)(13,17)(14,16)", "b=(2,27)(3,26)(4,25)(5,24)(6,23)(7,22)(8,21)(9,20)(10,19)(11,18)(12,17)(13,16)(14,15)", "c=<1,a*b,a*b,a*b,c^-1,c^-1,c^-1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,c,c,c,c*d,c*d,c*d>(2,27)(3,26)(4,25)(5,24)(6,23)(7,22)(8,21)(9,20)(10,19)(11,18)(12,17)(13,16)(14,15)", "d=<1,1,a*b,a*b,c^-1,c^-1,c^-1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,c,c,c*d,c*d,c*d>(1,2)(3,27)(4,26)(5,25)(6,24)(7,23)(8,22)(9,21)(10,20)(11,19)(12,18)(13,17)(14,16)", "a*b*c*d"); When the translation term of the affine map is lambda2: NewSphereMachine( "a=(1,26)(2,25)(3,24)(4,23)(5,22)(6,21)(7,20)(8,19)(9,18)(10,17)(11,16)(12,15)(13,14)", "b=(1,27)(2,26)(3,25)(4,24)(5,23)(6,22)(7,21)(8,20)(9,19)(10,18)(11,17)(12,16)(13,15)", "c=(1,27)(2,26)(3,25)(4,24)(5,23)(6,22)(7,21)(8,20)(9,19)(10,18)(11,17)(12,16)(13,15)", "d=(1,26)(2,25)(3,24)(4,23)(5,22)(6,21)(7,20)(8,19)(9,18)(10,17)(11,16)(12,15)(13,14)", "a*b*c*d"); When the translation term of the affine map is lambda1+lambda2: NewSphereMachine( "a=(1,27)(2,26)(3,25)(4,24)(5,23)(6,22)(7,21)(8,20)(9,19)(10,18)(11,17)(12,16)(13,15)", "b=<1,a*b,a*b,a*b,c^-1,c^-1,c^-1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,c,c,c,c*d,c*d,c*d>(2,27)(3,26)(4,25)(5,24)(6,23)(7,22)(8,21)(9,20)(10,19)(11,18)(12,17)(13,16)(14,15)", "c=(2,27)(3,26)(4,25)(5,24)(6,23)(7,22)(8,21)(9,20)(10,19)(11,18)(12,17)(13,16)(14,15)", "d=(1,27)(2,26)(3,25)(4,24)(5,23)(6,22)(7,21)(8,20)(9,19)(10,18)(11,17)(12,16)(13,15)", "a*b*c*d");