English Anna Sierpińska Cited by user David Eppstein on 10 Jun 2022 Anna Sierpińska is a Polish-Canadian scholar of mathematics education, known for her investigations of understanding and epistemology in mathematics education.
English 0.999... Cited by user 46.250.206.103 on 02 Aug 2021 In mathematics, 0.999... (also written as 0., 0. or 0.(9)) is a notation for the repeating decimal consisting of an unending sequence of 9s after the decimal point.