These Thurston maps are NET maps for every choice of translation term.
They have degree 18. They are imprimitive, each factoring as a NET map
with degree 3 followed by a Euclidean NET map with degree 6.
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
0/3, 0/6, 1/6, 2/3, 6/3
Every NET map in these pure modular group Hurwitz classes is
rational because the mod 2 slope correspondence graph has no loops.
EXCLUDED INTERVALS FOR THE HALF-SPACE COMPUTATION
(-268.024997,-0.667905 )
( -0.665433,-0.024150 )
( -0.023479,-0.023037 )
( -0.022940,-0.022518 )
( -0.021934,-0.021548 )
( -0.021463,-0.021093 )
( -0.020580,-0.020240 )
( -0.020165,-0.019838 )
( 0.019838,0.020165 )
( 0.020240,0.020580 )
( 0.021093,0.021463 )
( 0.021548,0.021934 )
( 0.022518,0.022940 )
( 0.023037,0.023479 )
( 0.023757,276.923977)
SLOPE FUNCTION INFORMATION
There are no slope function fixed points because
the mod 2 slope correspondence graph has no loops.
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.
If the slope function maps slope p/q to slope p'/q', then |q'| <= |q|
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=(2,6)(3,17)(4,16)(5,9)(7,13)(8,12)(11,15)(14,18)",
"b=**(1,16)(2,3)(4,13)(5,6)(7,10)(8,9)(11,12)(14,15)(17,18)",
"c=<1,1,a*b,c,c^-1,c^-1,1,1,c^-1,1,1,c,1,1,c,1,1,c*d>(1,2)(3,18)(4,5)(6,15)(7,8)(9,12)(10,11)(13,14)(16,17)",
"d=(1,17)(2,4)(5,7)(6,18)(8,10)(9,15)(11,13)(14,16)",
"a*b*c*d");
When the translation term of the affine map is lambda1:
NewSphereMachine(
"a=(1,4)(2,6)(3,17)(5,9)(7,16)(8,12)(10,13)(11,15)(14,18)",
"b=(2,3)(4,16)(5,6)(7,13)(8,9)(11,12)(14,15)(17,18)",
"c=<1,1,1,1,1,c^-1,1,1,c^-1,1,1,1,1,1,c,1,1,c*d>(1,2)(4,5)(6,18)(7,8)(9,15)(10,11)(13,14)(16,17)",
"d=(1,17)(2,4)(3,6)(5,7)(8,10)(9,18)(11,13)(12,15)(14,16)",
"a*b*c*d");
When the translation term of the affine map is lambda2:
NewSphereMachine(
"a=<1,a*b,c^-1,1,1,c^-1,1,1,1,1,1,c,1,1,c*d,c*d,1,1>(1,5)(2,16)(3,15)(4,8)(6,12)(7,11)(10,14)(13,17)",
"b=<1,1,a*b,c,c^-1,c^-1,1,1,c^-1,1,1,c,1,1,c,1,1,c*d>(1,2)(3,18)(4,5)(6,15)(7,8)(9,12)(10,11)(13,14)(16,17)",
"c=****(1,16)(2,3)(4,13)(5,6)(7,10)(8,9)(11,12)(14,15)(17,18)",
"d=****(1,13)(2,18)(3,5)(4,10)(6,8)(9,11)(12,14)(15,17)",
"a*b*c*d");
When the translation term of the affine map is lambda1+lambda2:
NewSphereMachine(
"a=<1,a*b,a*b,c^-1,1,c^-1,1,c,c^-1,1,1,c,1,1,c,c*d,1,c*d>(1,5)(2,16)(3,18)(4,8)(6,15)(7,11)(9,12)(10,14)(13,17)",
"b=<1,1,1,1,1,c^-1,1,1,c^-1,1,1,1,1,1,c,1,1,c*d>(1,2)(4,5)(6,18)(7,8)(9,15)(10,11)(13,14)(16,17)",
"c=(2,3)(4,16)(5,6)(7,13)(8,9)(11,12)(14,15)(17,18)",
"d=****(1,16)(2,18)(3,5)(4,13)(6,8)(7,10)(9,11)(12,14)(15,17)",
"a*b*c*d");
**