{"version":"1.0","type":"link","title":"Groupoid - Newikis","description":"In mathematics, especially in category theory and homotopy theory, a groupoid (less often Brandt groupoid or virtual group) generalises the notion of group in several equivalent ways. A groupoid can be seen as a:","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400}