@article{hrj:7432, title = {A universal identity for theta functions of degree eight and applications}, author = {Zhi-Guo Liu}, url = {https://hrj.episciences.org/7432}, doi = {10.46298/hrj.2021.7432}, journal = {Hardy-Ramanujan Journal}, issn = {2804-7370}, volume = {Volume 43 - Special Commemorative volume in honour of Srinivasa Ramanujan - 2020}, eid = 11, year = {2021}, month = {May}, keywords = {Elliptic function, theta function, addition formula, Ramanujan's modular equations, 2010 Mathematics Subject Classification. 33E05, 11F11, 11F20, 11F27, [MATH]Mathematics [math]}, language = {English}, }