We restrict ourselves to two aspects of the field of group schemes,
in which the results are fairly complete: commutative algebraic
group schemes over an algebraically closed field (of characteristic
different from zero), and a duality theory concern ing abelian
schemes over a locally noetherian prescheme. The prelim inaries for
these considerations are brought together in chapter I. SERRE
described properties of the category of commutative quasi-algebraic
groups by introducing pro-algebraic groups. In char8teristic zero
the situation is clear. In characteristic different from zero
information on finite group schemee is needed in order to handle
group schemes; this information can be found in work of GABRIEL. In
the second chapter these ideas of SERRE and GABRIEL are put
together. Also extension groups of elementary group schemes are
determined. A suggestion in a paper by MANIN gave crystallization
to a fee11ng of symmetry concerning subgroups of abelian varieties.
In the third chapter we prove that the dual of an abelian scheme
and the linear dual of a finite subgroup scheme are related in a
very natural way. Afterwards we became aware that a special case of
this theorem was already known by CARTIER and BARSOTTI.
Applications of this duality theorem are: the classical duality
theorem ("duality hy pothesis," proved by CARTIER and by NISHI);
calculation of Ext( a, A), where A is an abelian variety (result
conjectured by SERRE); a proof of the symmetry condition (due to
MANIN) concerning the isogeny type of a formal group attached to an
abelian variety."
General
Imprint: |
Springer-Verlag
|
Country of origin: |
Germany |
Series: |
Lecture Notes in Mathematics, 15 |
Release date: |
1966 |
First published: |
1966 |
Authors: |
F. Oort
|
Dimensions: |
235 x 155 x 7mm (L x W x T) |
Format: |
Paperback
|
Pages: |
136 |
Edition: |
1966 ed. |
ISBN-13: |
978-3-540-03598-5 |
Categories: |
Books >
Science & Mathematics >
Mathematics >
Algebra >
General
|
LSN: |
3-540-03598-2 |
Barcode: |
9783540035985 |
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