Contents

Tate's thesis

Iwasawa–Tate theory[edit]

Kenkichi Iwasawa independently discovered essentially the same method (without an analog of the local theory in Tate's thesis) during the Second World War and announced it in his 1950 International Congress of Mathematicians paper and his letter to Jean Dieudonné written in 1952. Hence this theory is often called Iwasawa–Tate theory. Iwasawa in his letter to Dieudonné derived on several pages not only the meromorphic continuation and functional equation of the L-function, he also proved finiteness of the class number and Dirichlet's theorem on units as immediate byproducts of the main computation. The theory in positive characteristic was developed one decade earlier by Ernst Witt, Wilfried Schmid, and Oswald Teichmüller.

Iwasawa–Tate theory uses several structures which come from class field theory, however it does not use any deep result of class field theory.

Generalisations[edit]

Iwasawa–Tate theory was extended to the general linear group GL(n) over an algebraic number field and automorphic representations of its adelic group by Roger Godement and Hervé Jacquet in 1972 which formed the foundations of the Langlands correspondence. Tate's thesis can be viewed as the GL(1) case of the work by Godement–Jacquet.

See also[edit]

• Basic Number Theory

References[edit]

• Godement, Roger; Jacquet, Hervé (1972), Zeta functions of simple algebras, Lect. Notes Math., vol. 260, Springer
• Goldfeld, Dorian; Hundley, Joseph (2011), Automorphic representations of L-functions for the general linear group, Cambridge University Press
• Iwasawa, Kenkichi (1952), "A note on functions", Proceedings of the International Congress of Mathematicians, Cambridge, Mass., 1950, vol. 1, Providence, R.I.: American Mathematical Society, p. 322, MR 0044534, archived from the original on 2011-10-03
• Iwasawa, Kenkichi (1992) [1952], "Letter to J. Dieudonné", in Kurokawa, Nobushige; Sunada., T. (eds.), Zeta functions in geometry (Tokyo, 1990), Adv. Stud. Pure Math., vol. 21, Tokyo: Kinokuniya, pp. 445–450, ISBN 978-4-314-10078-6, MR 1210798
• Kudla, Stephen S. (2003), "Tate's thesis", in Bernstein, Joseph; Gelbart, Stephen (eds.), An introduction to the Langlands program (Jerusalem, 2001), Boston, MA: Birkhäuser Boston, pp. 109–131, ISBN 978-0-8176-3211-3, MR 1990377
• Ramakrishnan, Dinakar; Valenza, Robert J. (1999). Fourier analysis on number fields. Graduate Texts in Mathematics. Vol. 186. New York: Springer-Verlag. doi:10.1007/978-1-4757-3085-2. ISBN 0-387-98436-4. MR 1680912.
• Tate, John T. (1950), "Fourier analysis in number fields, and Hecke's zeta-functions", Algebraic Number Theory (Proc. Instructional Conf., Brighton, 1965), Thompson, Washington, D.C., pp. 305–347, ISBN 978-0-9502734-2-6, MR 0217026