Kloosterman sums and primitive elements in Galois fields
Stephen Cohen (2000)
Acta Arithmetica
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Stephen Cohen (2000)
Acta Arithmetica
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Stefan Johansson (1998)
Acta Arithmetica
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Wolfgang M. Schmidt (1995)
Acta Arithmetica
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Jukka Pihko (1993)
Acta Arithmetica
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Jürgen Ritter, Alfred Weiss (1999)
Acta Arithmetica
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Wolfgang Ch. Schmid, Reinhard Wolf (1997)
Acta Arithmetica
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Amir Akbary (2000)
Acta Arithmetica
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Bruce Hughes (1999)
Fundamenta Mathematicae
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Teardrops are generalizations of open mapping cylinders. We prove that the teardrop of a stratified approximate fibration X → Y × ℝ with X and Y homotopically stratified spaces is itself a homotopically stratified space (under mild hypothesis). This is applied to manifold stratified approximate fibrations between manifold stratified spaces in order to establish the realization part of a previously announced tubular neighborhood theory.