INFORMATION ON THE IMAGE IN PSL(2,Z) OF THE GROUP OF PURE MODULAR GROUP LIFTABLES UNDER ITS PULLBACK ACTION ON THE UPPER HALF-PLANE Index in PSL(2,Z): 96 Minimal number of generators: 17 Number of equivalence classes of cusps: 16 Genus: 1 REPRESENTATIVES OF THE CUSP EQUIVALENCE CLASSSES -2/1 -3/2 -5/4 -6/5 -1/1 -3/4 0/1 1/2 3/5 3/4 1/1 3/2 2/1 5/2 3/1 1/0 CUSPS AT THE FUNDAMENTAL DOMAIN AND THEIR IMAGES UNDER THE PULLBACK MAP CUSP IMAGE PSEUDOIMAGES -3/1 -1/1 -5/2 -1/2 -12/5 0/1 -7/3 -1/1 -2/1 0/1 -3/2 -1/1 -4/3 -2/3 -5/4 -1/2 0/1 -6/5 0/1 -1/1 -1/1 -3/4 -2/3 0/1 -5/7 -1/1 -2/3 -2/3 -5/8 -4/7 -1/2 -3/5 -1/2 -1/2 -1/2 0/1 0/1 1/2 1/0 3/5 1/0 5/8 -4/1 1/0 2/3 -2/1 3/4 -2/1 0/1 4/5 -2/1 1/1 -1/1 3/2 -1/1 5/3 -1/1 12/7 -2/3 7/4 -2/3 -1/2 2/1 0/1 7/3 -1/1 12/5 0/1 5/2 1/0 3/1 -1/1 1/0 -1/1 0/1 GENERATING SET ASSOCIATED TO THE FUNDAMENTAL DOMAIN GENERATOR EDGE PAIRING TYPE Matrix(1,6,0,1) (-3/1,1/0) -> (3/1,1/0) Parabolic Matrix(11,30,4,11) (-3/1,-5/2) -> (5/2,3/1) Hyperbolic Matrix(49,120,20,49) (-5/2,-12/5) -> (12/5,5/2) Hyperbolic Matrix(61,144,36,85) (-12/5,-7/3) -> (5/3,12/7) Hyperbolic Matrix(13,30,16,37) (-7/3,-2/1) -> (4/5,1/1) Hyperbolic Matrix(11,18,-8,-13) (-2/1,-3/2) -> (-3/2,-4/3) Parabolic Matrix(23,30,36,47) (-4/3,-5/4) -> (5/8,2/3) Hyperbolic Matrix(83,102,48,59) (-5/4,-6/5) -> (12/7,7/4) Hyperbolic Matrix(47,54,20,23) (-6/5,-1/1) -> (7/3,12/5) Hyperbolic Matrix(23,18,-32,-25) (-1/1,-3/4) -> (-3/4,-5/7) Parabolic Matrix(35,24,16,11) (-5/7,-2/3) -> (2/1,7/3) Hyperbolic Matrix(37,24,20,13) (-2/3,-5/8) -> (7/4,2/1) Hyperbolic Matrix(49,30,80,49) (-5/8,-3/5) -> (3/5,5/8) Hyperbolic Matrix(11,6,20,11) (-3/5,-1/2) -> (1/2,3/5) Hyperbolic Matrix(1,0,4,1) (-1/2,0/1) -> (0/1,1/2) Parabolic Matrix(25,-18,32,-23) (2/3,3/4) -> (3/4,4/5) Parabolic Matrix(13,-18,8,-11) (1/1,3/2) -> (3/2,5/3) Parabolic IMAGES OF THE GENERATORS UNDER THE VIRTUAL ENDOMORPHISM Matrix(1,6,0,1) -> Matrix(1,0,0,1) Matrix(11,30,4,11) -> Matrix(3,2,-2,-1) Matrix(49,120,20,49) -> Matrix(1,0,2,1) Matrix(61,144,36,85) -> Matrix(1,2,-2,-3) Matrix(13,30,16,37) -> Matrix(3,2,-2,-1) Matrix(11,18,-8,-13) -> Matrix(1,2,-2,-3) Matrix(23,30,36,47) -> Matrix(7,4,-2,-1) Matrix(83,102,48,59) -> Matrix(5,2,-8,-3) Matrix(47,54,20,23) -> Matrix(1,0,0,1) Matrix(23,18,-32,-25) -> Matrix(1,0,0,1) Matrix(35,24,16,11) -> Matrix(3,2,-2,-1) Matrix(37,24,20,13) -> Matrix(3,2,-8,-5) Matrix(49,30,80,49) -> Matrix(15,8,-2,-1) Matrix(11,6,20,11) -> Matrix(3,2,-2,-1) Matrix(1,0,4,1) -> Matrix(1,0,2,1) Matrix(25,-18,32,-23) -> Matrix(1,0,0,1) Matrix(13,-18,8,-11) -> Matrix(1,2,-2,-3) INFORMATION ON THE IMAGE OF THIS GROUP UNDER THE VIRTUAL ENDOMORPHISM Index in PSL(2,Z): 6 Minimal number of generators: 2 Number of equivalence classes of cusps: 3 Genus: 0 Degree of H/liftables -> H/(image of liftables): 5 Degree of the the map X: 5 Degree of the the map Y: 16 Permutation triple for Y: ((1,2)(3,9,14,6,13,10)(4,11,8,7,12,5)(15,16); (1,5,12,16,13,6)(2,8,11,15,9,3)(4,10)(7,14); (1,3,4)(2,6,7)(10,16,11)(12,14,15)) ----------------------------------------------------------------------- Elements among 0, lambda1, lambda2 and lambda1+lambda2 which lift elements of DeckMod(f) via pi_1: 0 DeckMod(f) is trivial. Elements among 0, lambda1, lambda2 and lambda1+lambda2 which lift modular group liftables via pi_1: 0 The subgroup of modular group liftables which arise from translations is trivial. ----------------------------------------------------------------------- The image of the modular group liftables in PSL(2,Z) equals the image of the pure modular group liftables. ----------------------------------------------------------------------- INFORMATION ON THE IMAGE IN PGL(2,Z) OF THE GROUP OF EXTENDED MODULAR GROUP LIFTABLES UNDER ITS PULLBACK ACTION ON THE UPPER HALF-PLANE CUSPS AT THE FUNDAMENTAL DOMAIN AND THEIR IMAGES UNDER THE PULLBACK MAP CUSP IMAGE c d 0/1 0/1 1 2 1/2 1/0 2 6 3/5 1/0 3 2 5/8 (-4/1,1/0) 0 6 2/3 -2/1 1 6 3/4 0 2 4/5 -2/1 1 6 1/1 -1/1 1 6 3/2 -1/1 2 2 5/3 -1/1 1 6 12/7 -2/3 2 2 7/4 (-2/3,-1/2) 0 6 2/1 0/1 1 6 7/3 -1/1 1 6 12/5 0/1 2 2 5/2 1/0 2 6 3/1 -1/1 1 2 1/0 (-1/1,0/1) 0 6 GENERATING SET ASSOCIATED TO THE FUNDAMENTAL DOMAIN GENERATOR EDGE PAIRING TYPE Matrix(1,0,0,-1) (0/1,1/0) -> (0/1,1/0) Reflection Matrix(1,0,4,-1) (0/1,1/2) -> (0/1,1/2) Reflection Matrix(11,-6,20,-11) (1/2,3/5) -> (1/2,3/5) Reflection Matrix(49,-30,80,-49) (3/5,5/8) -> (3/5,5/8) Reflection Matrix(37,-24,20,-13) (5/8,2/3) -> (7/4,2/1) Glide Reflection Matrix(25,-18,32,-23) (2/3,3/4) -> (3/4,4/5) Parabolic Matrix(37,-30,16,-13) (4/5,1/1) -> (2/1,7/3) Glide Reflection Matrix(13,-18,8,-11) (1/1,3/2) -> (3/2,5/3) Parabolic Matrix(85,-144,36,-61) (5/3,12/7) -> (7/3,12/5) Glide Reflection Matrix(97,-168,56,-97) (12/7,7/4) -> (12/7,7/4) Reflection Matrix(49,-120,20,-49) (12/5,5/2) -> (12/5,5/2) Reflection Matrix(11,-30,4,-11) (5/2,3/1) -> (5/2,3/1) Reflection Matrix(-1,6,0,1) (3/1,1/0) -> (3/1,1/0) Reflection IMAGES OF THE GENERATORS MAP ON REFLECTION AXES OR UNDER THE VIRTUAL ENDOMORPHISM FIXED POINT OF IMAGE Matrix(1,0,0,-1) -> Matrix(-1,0,2,1) (0/1,1/0) -> (-1/1,0/1) Matrix(1,0,4,-1) -> Matrix(1,0,0,-1) (0/1,1/2) -> (0/1,1/0) Matrix(11,-6,20,-11) -> Matrix(1,2,0,-1) (1/2,3/5) -> (-1/1,1/0) Matrix(49,-30,80,-49) -> Matrix(1,8,0,-1) (3/5,5/8) -> (-4/1,1/0) Matrix(37,-24,20,-13) -> Matrix(1,2,-2,-5) Matrix(25,-18,32,-23) -> Matrix(1,0,0,1) Matrix(37,-30,16,-13) -> Matrix(1,2,0,-1) *** -> (-1/1,1/0) Matrix(13,-18,8,-11) -> Matrix(1,2,-2,-3) -1/1 Matrix(85,-144,36,-61) -> Matrix(3,2,-4,-3) *** -> (-1/1,-1/2) Matrix(97,-168,56,-97) -> Matrix(7,4,-12,-7) (12/7,7/4) -> (-2/3,-1/2) Matrix(49,-120,20,-49) -> Matrix(1,0,0,-1) (12/5,5/2) -> (0/1,1/0) Matrix(11,-30,4,-11) -> Matrix(1,2,0,-1) (5/2,3/1) -> (-1/1,1/0) Matrix(-1,6,0,1) -> Matrix(-1,0,2,1) (3/1,1/0) -> (-1/1,0/1) ----------------------------------------------------------------------- The pullback map has no extra symmetries.