These Thurston maps are NET maps for every choice of translation term.
They are primitive and have degree 8.
PURE MODULAR GROUP HURWITZ EQUIVALENCE CLASSES FOR TRANSLATIONS
{0} {lambda1} {lambda2} {lambda1+lambda2}
Since no Thurston multiplier is 1, this modular group Hurwitz class
contains only finitely many Thurston equivalence classes.
The number of pure modular group Hurwitz classes
in this modular group Hurwitz class is 12.
ALL THURSTON MULTIPLIERS c/d IN UNREDUCED FORM
0/4, 1/4, 1/2
Since every Thurston multiplier is less than 1, every
NET map in this modular group Hurwitz class is rational.
EXCLUDED INTERVALS FOR THE HALF-SPACE COMPUTATION
(-136.911688,-3.018647 )
( -2.982023,-2.027778 )
( -1.972222,-1.666667 )
( -1.666667,-1.006065 )
( -0.993861,141.740115)
SLOPE FUNCTION INFORMATION
NUMBER OF FIXED POINTS: 2 EQUATOR?
FIXED POINT c d 0 lambda1 lambda2 lambda1+lambda2
1/2 1 2 No No No No
0/1 1 4 No No No No
NUMBER OF EQUATORS: 0 0 0 0
There are no more slope function fixed points.
Number of excluded intervals computed by the fixed point finder: 524
There are no equators because both elementary divisors are greater than 1.
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 either one of the above cycles or the nonslope.
If the slope function maps slope p/q to slope p'/q', then |p'| <= |p|
for every slope p/q with |p| <= 50 and |q| <= 50.
FUNDAMENTAL GROUP WREATH RECURSIONS
When the translation term of the affine map is 0:
NewSphereMachine(
"a=<1,a*b,b,1,1,c*d,1,1>(2,6)(3,7)",
"b=(1,7)(2,8)(3,5)(4,6)",
"c=(1,2)(3,4)(5,6)(7,8)",
"d=(1,8)(2,3)(4,5)(6,7)",
"a*b*c*d");
When the translation term of the affine map is lambda1:
NewSphereMachine(
"a=(1,3)(2,8)(4,6)(5,7)",
"b=<1,1,b,c*a*b,1,1,1,c*d*c^-1>(3,7)(4,8)",
"c=(1,2)(3,4)(5,6)(7,8)",
"d=(1,8)(2,3)(4,5)(6,7)",
"a*b*c*d");
When the translation term of the affine map is lambda2:
NewSphereMachine(
"a=<1,a*b,1,1,1,1,c*d*c,1>(1,4)(2,7)(3,6)(5,8)",
"b=(1,2)(3,4)(5,6)(7,8)",
"c=(1,7)(2,8)(3,5)(4,6)",
"d=**(1,5)(4,8)",
"a*b*c*d");
When the translation term of the affine map is lambda1+lambda2:
NewSphereMachine(
"a=<1,a*b,1,1,1,1,c*d,1>(1,4)(2,7)(3,6)(5,8)",
"b=(1,2)(3,4)(5,6)(7,8)",
"c=<1,1,b,c*a*b,1,1,1,c*d*c^-1>(3,7)(4,8)",
"d=(1,7)(2,4)(3,5)(6,8)",
"a*b*c*d");
**