### Definition of Basel problem

1. Noun. (mathematics) The question as to the value of $\sum_\left\{n=1\right\}^\infty\frac1\left\{n^2\right\}$, the sum of the reciprocals of the squares of the positive integers. ¹

¹ Source: wiktionary.com

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### Lexicographical Neighbors of Basel Problem

 BaryshnikovBarzunianBaréBas-RhinBasaaBasanBasan's syndromeBasedow's diseaseBasedow's goiterBasedow's pseudoparaplegia BaselBasel-CityBasel-CountryBasel-LandschaftBasel-StadtBasel problemBasenjiBasenjisBashBasham's mixture BasheerBashirBashkirBashkiriaBashkirsBashkortostanBashkortostaniBashkortostanisBasiaBasic English