TY JOUR TI The Duality Principle Is the Theoretical Basis of Interrelation of Synthetic and Analytical Methods of Solving Geometric Problems KW descriptive geometry KW synthetic and analytical methods of solving geometric problems KW dimension KW the degree of freedom, the principle of duality in multidimensional projective space. JO Geometry & Graphics AU Ivanov, G.. AU Dmitrieva, I.M. PY 2016 IS 4 PB INFRA-M Academic Publishing LLC.