"The duality theorems for a manifold will be derived from the corresponding ones for nets and co-nets of group systems ... Of the two types of duality theorems — the and s — the first could be obtained more easily from the corresponding one for a group system and its character system ... But when applied to the Alexander type this method fails. Also in using the net and co-net theory for both types, the less complicated Poincaré theorem serves as an introduction for the Alexander theorem."
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Academics from the United StatesMathematicians from the United StatesAcademics from AustriaMathematicians from Austria
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Duality Theorems. In: ' 35, 1948, 188–202.
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Walther Mayer
(11 March 1887 – 10 September 1948) was a Jewish, Austrian mathematician, born in , . With he gained fame for originating the in topology. From 1929 until his death in 1948, Mayer mathematically assisted Albert Einstein. In 1933 Einstein moved to the United States and joined the (IAS). Mayer soon followed Einstein to the IAS and acquired the nickname "Einstein's calculator".
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