Alexander duality

In mathematics, Alexander duality refers to a duality theory presaged by a result of 1915 by J. W. Alexander, and subsequently further developed, particularly by P. S. Alexandrov and Lev Pontryagin. It applies to the homology theory properties of the complement of a subspace X in Euclidean space, a sphere, or other manifold. It is generalized by Spanier-Whitehead duality.

单词	Alexander duality
释义	Alexander duality 英语百科 Alexander duality In mathematics, Alexander duality refers to a duality theory presaged by a result of 1915 by J. W. Alexander, and subsequently further developed, particularly by P. S. Alexandrov and Lev Pontryagin. It applies to the homology theory properties of the complement of a subspace X in Euclidean space, a sphere, or other manifold. It is generalized by Spanier-Whitehead duality.
随便看	trial of fact trial offer trial of final instance trial of first instance Trial of Labor trial of law trial of second instance Trial of the Pyx trial of voiding trial of war criminal trialog trialogs trialogue trial on appeal Trial on indictment trial on the merits trial operation trial operation of boiler trial operation of turbine trial order trial output trial pavement section trial period trial pile Trial pit