[{"acknowledgement":"The author was supported by the Swiss National Science Foundation grant 200021_179133. The author acknowledges the financial support from the Ministry of Education and Science of the Russian Federation in the framework of MegaGrant no. 075-15-2019-1926.","year":"2021","date_created":"2022-03-18T09:55:59Z","citation":{"chicago":"Ivanov, Grigory. “Tight Frames and Related Geometric Problems.” <i>Canadian Mathematical Bulletin</i>. Canadian Mathematical Society, 2021. <a href=\"https://doi.org/10.4153/s000843952000096x\">https://doi.org/10.4153/s000843952000096x</a>.","mla":"Ivanov, Grigory. “Tight Frames and Related Geometric Problems.” <i>Canadian Mathematical Bulletin</i>, vol. 64, no. 4, Canadian Mathematical Society, 2021, pp. 942–63, doi:<a href=\"https://doi.org/10.4153/s000843952000096x\">10.4153/s000843952000096x</a>.","ista":"Ivanov G. 2021. Tight frames and related geometric problems. Canadian Mathematical Bulletin. 64(4), 942–963.","ieee":"G. Ivanov, “Tight frames and related geometric problems,” <i>Canadian Mathematical Bulletin</i>, vol. 64, no. 4. Canadian Mathematical Society, pp. 942–963, 2021.","ama":"Ivanov G. Tight frames and related geometric problems. <i>Canadian Mathematical Bulletin</i>. 2021;64(4):942-963. doi:<a href=\"https://doi.org/10.4153/s000843952000096x\">10.4153/s000843952000096x</a>","short":"G. Ivanov, Canadian Mathematical Bulletin 64 (2021) 942–963.","apa":"Ivanov, G. (2021). Tight frames and related geometric problems. <i>Canadian Mathematical Bulletin</i>. Canadian Mathematical Society. <a href=\"https://doi.org/10.4153/s000843952000096x\">https://doi.org/10.4153/s000843952000096x</a>"},"keyword":["General Mathematics","Tight frame","Grassmannian","zonotope"],"_id":"10860","article_type":"original","doi":"10.4153/s000843952000096x","publication_status":"published","external_id":{"isi":["000730165300021"],"arxiv":["1804.10055"]},"abstract":[{"text":"A tight frame is the orthogonal projection of some orthonormal basis of Rn onto Rk. We show that a set of vectors is a tight frame if and only if the set of all cross products of these vectors is a tight frame. We reformulate a range of problems on the volume of projections (or sections) of regular polytopes in terms of tight frames and write a first-order necessary condition for local extrema of these problems. As applications, we prove new results for the problem of maximization of the volume of zonotopes.","lang":"eng"}],"publisher":"Canadian Mathematical Society","date_published":"2021-12-18T00:00:00Z","department":[{"_id":"UlWa"}],"page":"942-963","volume":64,"quality_controlled":"1","oa":1,"date_updated":"2023-09-05T12:43:09Z","article_processing_charge":"No","issue":"4","title":"Tight frames and related geometric problems","isi":1,"intvolume":"        64","scopus_import":"1","language":[{"iso":"eng"}],"publication":"Canadian Mathematical Bulletin","author":[{"last_name":"Ivanov","id":"87744F66-5C6F-11EA-AFE0-D16B3DDC885E","full_name":"Ivanov, Grigory","first_name":"Grigory"}],"arxiv":1,"month":"12","publication_identifier":{"eissn":["1496-4287"],"issn":["0008-4395"]},"day":"18","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/1804.10055"}],"oa_version":"Preprint","user_id":"c635000d-4b10-11ee-a964-aac5a93f6ac1","status":"public","type":"journal_article"}]