On A Result of Ramanujan on Theta Functions
β Scribed by S.S. Rangachari
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 261 KB
- Volume
- 48
- Category
- Article
- ISSN
- 0022-314X
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
Let f (a, b) denote Ramanujan's theta series. In his ``Lost Notebook'', Ramanujan claimed that the ``circular'' summation of n th powers of f satisfies a factorization of the form f (a n , b n ) F n (a n b n ) where F n (q)=1+2nq (n&1)Γ2 + } } } . Moreover, he listed explicit closed formulas for F 2
In his famous paper [11], [12, pp. 23 39], Ramanujan offers several elegant series for 1Γ?. He then remarks, ``There are corresponding theories in which q is replaced by one or other of the functions'' where r=3, 4, or 6 and where 2 F 1 denotes the classical Gaussian hypergeometric function. In the
In the unorganized pages of his second notebook, Ramanujan offers two new theta-function identities that have a form different from other identities found in the literature. Using the theory of modular forms, we prove a general theorem containing Ramanujan's two identities as special cases. 1994 Aca
In this paper we will start with one identity of Ramanujan about Lambert series related to modular relations of degree 7 to give some completely new proofs of several important theta functions identities proved by Berndt and Zhang [1994, J. Number Theory 48, 224 242] via the theory of modular forms.