EntityQ662447· pop 11· linked from 34 articlesTakebe KatahiroSign in to saveJapanese mathematicianConnectionsPiConceptInternational Standard Book NumberEntitycalculusEntityabacusEntitySrinivasa RamanujanEntityfamily nameEntityAryabhataEntityshogunEntityPi DayEntityOCLC, Inc.EntityTokugawa shogunateEntityEdo periodEntityFrançois VièteEntityWorldCatEntityGoogle BooksEntityUniversity of St AndrewsEntitysquaring the circleEntitypower seriesEntityShinto shrineEntityLudolph van CeulenEntityCategories1664 births1739 deaths17th-century Japanese mathematicians18th-century cartographers18th-century Japanese mathematiciansDynamic listsWriters of the Edo period