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Holub (1988) 1101 introduced the concept of backward shift on Banach spaces. We show that an infinite-dimensional function algebra does not admit a backward shift. 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Holub (1988) 1101 introduced the concept of backward shift on Banach spaces. We show that an infinite-dimensional function algebra does not admit a backward shift. Moreover, we define a backward quasi-shift as a weak type of a backward shift, and show that a function algebra A does not admit it, under the assumption that the Choquet boundary of A has at most finitely many isolated points. (C) 2010 Elsevier Inc. All rights reserved."}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Takagi,  Hiroyuki"}], "nameIdentifiers": [{"nameIdentifier": "36233", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Koshimizu,  Hironao"}], "nameIdentifiers": [{"nameIdentifier": "36234", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Ariizumi,  Hiroaki"}], "nameIdentifiers": [{"nameIdentifier": "36235", "nameIdentifierScheme": "WEKO"}]}]}, "item_files": {"attribute_name": "ファイル情報", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_date", "date": [{"dateType": "Available", "dateValue": "2015-09-28"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "backward-shifts.pdf", "filesize": [{"value": "103.5 kB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_note", "mimetype": "application/pdf", "size": 103500.0, "url": {"label": "backward-shifts.pdf", "url": "https://soar-ir.repo.nii.ac.jp/record/11828/files/backward-shifts.pdf"}, "version_id": "e107e1a7-34fd-48a4-8c64-bbda448884c0"}]}, "item_keyword": {"attribute_name": "キーワード", "attribute_value_mlt": [{"subitem_subject": "Backward shifts", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Function algebras", "subitem_subject_scheme": "Other"}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "eng"}]}, "item_resource_type": {"attribute_name": "資源タイプ", "attribute_value_mlt": [{"resourcetype": "journal article", "resourceuri": "http://purl.org/coar/resource_type/c_6501"}]}, "item_title": "Backward shifts on function algebras", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "Backward shifts on function algebras", "subitem_title_language": "en"}]}, "item_type_id": "6", "owner": "1", "path": ["1170"], "permalink_uri": "http://hdl.handle.net/10091/16087", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2012-11-22"}, "publish_date": "2012-11-22", "publish_status": "0", "recid": "11828", "relation": {}, "relation_version_is_last": true, "title": ["Backward shifts on function algebras"], "weko_shared_id": -1}