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The Number $$\pi $$ π and a Summation by $$SL(2,{\mathbb {Z}})$$ S L ( 2 , Z )

Crossref DOI link: https://doi.org/10.1007/s40598-017-0075-9

Published Online: 2017-11-02

Published Print: 2017-12

Update policy: https://doi.org/10.1007/springer_crossmark_policy