{"version":"1.0","type":"link","title":"Hexagonal tortoise problem - Newikis","description":"The hexagonal tortoise problem (Korean: 지수귀문도; Hanja: 地數龜文圖; RR: jisugwimundo) was invented by Korean aristocrat and mathematician Choi Seok-jeong (1646–1715). It is a mathematical problem that involves a hexagonal lattice, like the hexagonal pattern on some tortoises' shells, to the (N) vertices…","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400,"thumbnail_url":"https://thumb.wikimedia.org/wikipedia/commons/thumb/5/5e/Hexagonal_tortoise_problem.svg/1280px-Hexagonal_tortoise_problem.svg.png","thumbnail_width":1280,"thumbnail_height":1920}