Download Complex Analysis and Algebraic Geometry by Grauert G. (ed.) PDF

By Grauert G. (ed.)

Show description

Read Online or Download Complex Analysis and Algebraic Geometry PDF

Best algebraic geometry books

Quadratic and hermitian forms over rings

This ebook offers the idea of quadratic and hermitian kinds over earrings in a truly common atmosphere. It avoids, so far as attainable, any limit at the attribute and takes complete good thing about the functorial homes of the idea. it isn't an encyclopedic survey. It stresses the algebraic elements of the speculation and avoids - is fairly overlapping with different books on quadratic types (like these of Lam, Milnor-Husemöller and Scharlau).

Liaison, Schottky Problem and Invariant Theory: Remembering Federico Gaeta

This quantity is a homage to the reminiscence of the Spanish mathematician Federico Gaeta (1923-2007). except a old presentation of his existence and interplay with the classical Italian tuition of algebraic geometry, the quantity provides surveys and unique examine papers at the arithmetic he studied.

Automorphisms in Birational and Affine Geometry: Levico Terme, Italy, October 2012

The main target of this quantity is at the challenge of describing the automorphism teams of affine and projective forms, a classical topic in algebraic geometry the place, in either situations, the automorphism workforce is frequently endless dimensional. the gathering covers quite a lot of themes and is meant for researchers within the fields of classical algebraic geometry and birational geometry (Cremona teams) in addition to affine geometry with an emphasis on algebraic workforce activities and automorphism teams.

Additional info for Complex Analysis and Algebraic Geometry

Sample text

14. Suppose that the k-algebra O is a complete discrete k-valuation ring with residue class map η : O F. Assume further that F is a finite separable extension of k. Given any local parameter t, there is a unique isometric ˆ isomorphism µˆ : F[[X]] O such that µ(X) = t. Proof. 12). Define µˆ : F[[X]] → O via µˆ ∑ ai X i i := ∑ µ(ai )t i . i This map is clearly well-defined and injective, and is uniquely determined by µ and t. To show that it is surjective, put F := im(µ). Then O = F + P, and F ∩ P = 0.

Proof. 13) we have D(i) y ( f ) = 0 for 0 < i < p. 4 Residues In this section, we discuss Tate’s elegant theory of abstract residues, closely following [20]. For a variation based on topological ideas, see the appendix of [13]. Let V be a (not necessarily finite-dimensional) vector space over a field k. Recall that a k-linear map y : V → V has finite rank if y(V ) is finite-dimensional. We can generalize this notion by calling y finitepotent if yn (V ) is finite-dimensional for some positive integer n.

Now consider the polynomial D( f ) ∈ A[X]. We have D( f ) ≡ f1 mod M where M is the maximal graded ideal of A. It follows that v is a root of D( f ) modulo M and that D( f ) (v) is invertible modulo M. By Hensel’s Lemma, there is a unique root v1 of D( f ) in A congruent to v modulo M. To each such root there corresponds a unique extension D1 of D to K1 , defined by D1 (u) = v1 . 5. Let K1 /K be a finite extension of fields. Then K1 /K is separable if and only if every derivation of K into a K1 -module M extends uniquely to K1 .

Download PDF sample

Rated 4.37 of 5 – based on 21 votes