Home›Duality (mathematics)›ทวิภาวะ🌐ไทยEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiSvenskaРусскийالعربيةไทย中文日本語EntityQ735346· pop 14· linked from 116 articlesทวิภาวะAlso known as duality in projective geometrysymmetry in projective geometryAvailable in 14 languagesEspañolFrançaisDeutsch中文РусскийالعربيةHungarianNederlandsPolskiSvenskaConnectionsquadricEntitydivision ringEntityCategoriesDuality (mathematics)Projective geometry