Via the theory of zeta integrals initiated by Kenkichi Iwasawa and by John Tate in Tate's thesis it is related to the study of the zeta function of global fields.

Tate's thesis ( 1950 ) on Fourier analysis in number fields has become one of the ingredients for the modern theory of automorphic forms and their L-functions, notably by its use of the adele ring, its self-duality and harmonic analysis on it ; independently and a little earlier, Kenkichi Iwasawa obtained a similar theory.

The latter was explicitly introduced in papers of Kenkichi Iwasawa and John Tate.

It began as a Galois module theory of ideal class groups, initiated by Kenkichi Iwasawa, in the 1950s, as part of the theory of cyclotomic fields.

It is named after Kenkichi Iwasawa, the Japanese mathematician who developed this method.

* Iwasawa, Kenkichi: On some types of topological groups.

* 1962 Kenkichi Iwasawa, Bernard M. Dwork

Kenkichi Iwasawa ( Iwasawa Kenkichi, September 11, 1917 – October 26, 1998 ) was a Japanese mathematician who is known for his influence on algebraic number theory.

* Lectures on p-adic L-functions / by Kenkichi Iwasawa ( 1972 )

* Local class field theory / Kenkichi Iwasawa ( 1986 ) ISBN 0-19-504030-9

* Algebraic functions / Kenkichi Iwasawa ; translated by Goro Kato ( 1993 ) ISBN 0-8218-4595-0

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He received Ph. D. in Mathematics at MIT in 1956 under direction of Kenkichi Iwasawa.

* Kenkichi Kataoka ( 1902 – 1904 ) Speaker of the House of Representatives ; the Lower House Speaker.

* Kenkichi Ueda ( 6 March 1936 – 7 September 1939 )

* Mathematics: Approximation theory — Arakelov theory — Asymptotic theory — Bifurcation theory — Catastrophe theory — Category theory — Chaos theory — Choquet theory — Coding theory — Combinatorial game theory — Computability theory — Computational complexity theory — Deformation theory — Dimension theory — Ergodic theory — Field theory — Galois theory — Game theory — Graph theory — Group theory — Hodge theory — Homology theory — Homotopy theory — Ideal theory — Intersection theory — Invariant theory — Iwasawa theory — K-theory — KK-theory — Knot theory — L-theory — Lie theory — Littlewood – Paley theory — Matrix theory — Measure theory — Model theory — Morse theory — Nevanlinna theory — Number theory — Obstruction theory — Operator theory — PCF theory — Perturbation theory — Potential theory — Probability theory — Ramsey theory — Rational choice theory — Representation theory — Ring theory — Set theory — Shape theory — Small cancellation theory — Spectral theory — Stability theory — Stable theory — Sturm – Liouville theory — Twistor theory

* The Iwasawa decomposition G = KAN of a semisimple group G as the product of compact, abelian, and nilpotent subgroups generalises the way a square real matrix can be written as a product of an orthogonal matrix and an upper triangular matrix ( a consequence of Gram – Schmidt orthogonalization ).

E. B. Tylor ( 2 October 1832 – 2 January 1917 ) and James George Frazer ( 1 January 1854 – 7 May 1941 ) are generally considered the antecedents to modern social anthropology in Britain.

* Robert E. Cox ( 1917 – 1989 ) who conducted the " Gleanings for ATMs " column in Sky and Telescope magazine for 21 years.

* 1917 – World War I: The United States declares war on Germany ( see President Woodrow Wilson's address to Congress ).

* 1849 – John William Waterhouse, British painter ( d. 1917 )

* 1917 – Leonora Carrington, British surrealist painter ( d. 2011 )

* 1917 – World War I: Canadian forces successfully complete the taking of Vimy Ridge from the Germans.

* 1917 – Helen Forrest, American singer ( d. 1999 )

* 1877 – Léon Flameng, French cyclist ( d. 1917 )

* 1917 – Peanuts Lowrey, American baseball player ( d. 1986 )

* 1917 – World War I: Battle of Mărăşeşti between the Romanian and German armies begins.

* 1917 – Robert Mitchum, American actor ( d. 1997 )

Category: Corresponding Members of the Russian Academy of Sciences ( 1917 – 1925 )

* 1917 – Sid Gordon, American baseball player ( d. 1975 )

* 1917 – Scott Joplin, American musician and composer ( b. 1868 )

Eastern European theorists include Pyotr Stolypin ( 1862 – 1911 ) and Alexander Chayanov ( 1888 – 1939 ) in Russia ; Adolph Wagner ( 1835 – 1917 ), and Karl Oldenberg in Germany, and Bolesław Limanowski ( 1835 – 1935 ) in Poland.

* 1917 – Les Elgart, American trumpet player and bandleader ( d. 1995 )

* 1917 – Ferdinand Georg Frobenius, German mathematician ( b. 1849 )

Bloch was highly interdisciplinary, influenced by the geography of Paul Vidal de la Blache ( 1845 – 1918 ) and the sociology of Émile Durkheim ( 1858 – 1917 ).

* 1860 – Alan Leo, English astrologer ( d. 1917 )

* 1876 – Mata Hari, Dutch spy ( d. 1917 )