Modular units and singular moduli

introduction

modular units
examples of SL(2,Z) invariant spaces spanned by modular units http://w3.countnumber.de/addons/Publikationen/text/mex.pdf

Larson, Hannah. “Andrews-Gordon Style Identities.” Research in Number Theory 1, no. 1 (October 8, 2015): 1–9. doi:10.1007/s40993-015-0014-6.
Larson, Hannah. “Modular Units from Quotients of Rogers-Ramanujan Type \(q\)-Series.” arXiv:1506.08313 [math], June 27, 2015. http://arxiv.org/abs/1506.08313.
Brunault, François. ‘Parametrizing Elliptic Curves by Modular Units’. arXiv:1504.00999 [math], 4 April 2015. http://arxiv.org/abs/1504.00999.
Streng, Marco. ‘Generators of the Group of Modular Units for Gamma1(N) over QQ’. arXiv:1503.08127 [math], 27 March 2015. http://arxiv.org/abs/1503.08127.
Eholzer, Wolfgang, and Nils-Peter Skoruppa. “SL(2,Z)-Invariant Spaces Spanned by Modular Units.” arXiv:q-alg/9704004, April 3, 1997. http://arxiv.org/abs/q-alg/9704004. http://dx.doi.org/10.1142/9789812774415_0016