DeclareGlobalFunction("SL2ZmElementsDecomposition");
DeclareGlobalFunction("SL2ZTree");
DeclareGlobalFunction("ResolutionGTree");
DeclareGlobalFunction("TreeOfResolutionsToSL2Zcomplex");
DeclareGlobalFunction("SL2ZResolution");
DeclareGlobalFunction("SL2ZResolution_alt");
DeclareGlobalFunction("ConjugateSL2ZGroup");
DeclareOperation("CongruenceSubgroupGamma0",[IsPosInt,IsPosInt]);
DeclareGlobalFunction("HAP_BaryCentricSubdivisionGComplex");
DeclareOperation("BarycentricSubdivision",[IsHapNonFreeResolution]);
