🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTürkçeРусскийالعربيةفارسیहिन्दीไทย한국어中文日本語EntityQ810431· pop 35· linked from 125 articlesBasel problemmathematical problemAvailable in 34 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoالعربيةहिन्दीConnectionstrigonometric functionEntityBernoulli numberEntityCategoriesMathematical problemsNumber theoryPi algorithmsSquares in number theoryZeta and L-functions