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"attribute_value_mlt": [{"subitem_description": "We study projections of matrix algebras over complex or real numbers, to (partially) classify the (generically non-degenerate) projections (in our sense) and their spaces algebraically and geometrically, in the three by three, and four by four matrix cases, and in the general matrix case.", "subitem_description_type": "Other"}, {"subitem_description": "\u7d00\u8981\u8ad6\u6587", "subitem_description_type": "Other"}]}, "item_1617186643794": {"attribute_name": "Publisher", "attribute_value_mlt": [{"subitem_1522300295150": "ja", "subitem_1522300316516": "\u7409\u7403\u5927\u5b66\u7406\u5b66\u90e8"}, {"subitem_1522300295150": "en", "subitem_1522300316516": "Faculty of Science University of the Ryukyus"}]}, "item_1617186702042": {"attribute_name": "Language", "attribute_value_mlt": [{"subitem_1551255818386": "jpn"}]}, "item_1617186783814": {"attribute_name": "Identifier", "attribute_value_mlt": [{"subitem_identifier_type": "HDL", 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"recid": "2012067", "relation": {}, "relation_version_is_last": true, "title": ["The algebraic and geometric classification of generically non-degenerate projections of matrix algebras over complex numbers"], "weko_shared_id": -1}