Splitting Deformations of Degenerations of Complex Curves
Towards the Classification of Atoms of Degenerations, III
By: Shigeru Takamura
Paperback | 26 July 2006
At a Glance
612 Pages
23.39 x 15.6 x 3.15
Paperback
$101.07
or 4 interest-free payments of $25.27 with
orAims to ship in 7 to 10 business days
The author develops a deformation theory for degenerations of complex curves; specifically, he treats deformations which induce splittings of the singular fiber of a degeneration. He constructs a deformation of the degeneration in such a way that a subdivisor is "barked" (peeled) off from the singular fiber. These "barking deformations" are related to deformations of surface singularities (in particular, cyclic quotient singularities) as well as the mapping class groups of Riemann surfaces (complex curves) via monodromies. Important applications, such as the classification of atomic degenerations, are also explained.
Industry Reviews
From the reviews:
"This is a 590 pages book on deformation theory, using mostly topological methods, but also 'translated' to algebraic geometry and using algebraic methods. ... It is a nice level and should be possible to read. Most commonly, algebraic geometers translate from differential geometry to solve problems. In this book the concept is vice versa: Algebraic methods are used to solve topological problems. Thus this book may at the first glance look elementary for an algebraist, but it is not." (Arvid Siqveland, Zentralblatt MATH, Vol. 1100 (2), 2007)
Introduction | p. 1 |
Notation | p. 17 |
Basic Notions and Ideas | |
Splitting Deformations of Degenerations | p. 23 |
Definitions | p. 23 |
Splitting criteria via configuration of singular fibers | p. 30 |
What is a barking? | p. 33 |
Barking, I | p. 33 |
Barking, II | p. 37 |
Semi-Local Barking Deformations: Ideas and Examples | p. 41 |
Semi-local example, I (Reduced barking) | p. 41 |
Semi-local example, II (Multiple barking) | p. 46 |
Semi-local example, III | p. 48 |
Supplement: Numerical condition | p. 51 |
Supplement: Example of computation of discriminant loci | p. 53 |
Global Barking Deformations: Ideas and Examples | p. 57 |
Preparation: Simplification lemmas | p. 57 |
Typical examples of barking deformations | p. 60 |
Supplement: Collision and Symmetry | p. 74 |
Collision, I | p. 74 |
Collision, II | p. 76 |
Construction based on symmetry | p. 78 |
Deformations of Tubular Neighborhoods of Branches | |
Deformations of Tubular Neighborhoods of Branches (Preparation) | p. 85 |
Branches | p. 85 |
Deformation atlas | p. 87 |
Subbranches | p. 89 |
Dominant subbranches | p. 91 |
Tame and wild subbranches | p. 93 |
Supplement: Riemenschneider's work | p. 98 |
Construction of Deformations by Tame Subbranches | p. 99 |
Construction of deformations by tame subbranches | p. 99 |
Supplement for the proof of Theorem 6.1.1 | p. 104 |
Alternative construction | p. 104 |
Generalization | p. 104 |
Proportional subbranches | p. 107 |
Singular fibers | p. 109 |
Construction of Deformations of type Al | p. 119 |
Deformations of type Al | p. 119 |
Singular fibers | p. 124 |
Supplement: Singularities of certain curves | p. 129 |
Newton polygons and singularities | p. 137 |
Construction of Deformations by Wild Subbranches | p. 143 |
Deformations of ripple type | p. 144 |
Singular fibers | p. 150 |
Subbranches of Types Al, Bl, Cl | p. 153 |
Subbranches of types Al, Bl, Cl | p. 153 |
Demonstration of properties of type Al | p. 160 |
Demonstration of properties of type Bl | p. 164 |
Demonstration of properties of type Cl | p. 166 |
Construction of Deformations of Type Bl | p. 177 |
Deformations of type Bl | p. 178 |
Singular fibers | p. 180 |
Construction of Deformations of Type Cl | p. 183 |
Waving polynomials | p. 183 |
Waving sequences | p. 187 |
Deformations of type Cl | p. 191 |
Singular fibers | p. 198 |
Supplement: The condition that u divides l | p. 200 |
Proof of Lemma 11.5.1 | p. 203 |
Recursive Construction of Deformations of Type Cl | p. 209 |
Ascending, descending, and stable polynomials | p. 209 |
Technical preparation I | p. 213 |
Recursive construction I | p. 218 |
Technical preparation II | p. 225 |
Recursive construction II | p. 228 |
Examples of non-recursive deformations of type Cl | p. 232 |
Types Al, Bl, and Cl Exhaust all Cases | p. 235 |
Results | p. 235 |
Preparation | p. 236 |
Case 1: b = 0 | p. 238 |
Case 2: b ≥ 1 | p. 243 |
Conclusion | p. 249 |
Supplement: Proof of Lemma 13.4.4 | p. 249 |
Construction of Deformations by Bunches of Subbranches | p. 253 |
Propagation sequences | p. 253 |
Bunches of subbranches | p. 255 |
Example of a deformation by a wild bunch | p. 260 |
Barking Deformations of Degenerations | |
Construction of Barking Deformations (Stellar Case) | p. 265 |
Linear degenerations | p. 265 |
Deformation atlas | p. 267 |
Crusts | p. 271 |
Deformation atlas associated with one crust | p. 273 |
Reduced barking | p. 275 |
Simple Crusts (Stellar Case) | p. 279 |
Deformation atlases associated with multiple crusts | p. 279 |
Multiple barking | p. 281 |
Criteria for splittability | p. 284 |
Singularities of fibers | p. 288 |
Application to a constellar case | p. 292 |
Barking genus | p. 295 |
Constraints on simple crusts | p. 299 |
Compound barking (Stellar Case) | p. 303 |
Crustal sets | p. 303 |
Deformation atlas associated with a crustal set | p. 304 |
Example of a crustal set | p. 306 |
Deformations of Tubular Neighborhoods of Trunks | p. 309 |
Trunks | p. 309 |
Subtrunks, I | p. 311 |
Subtrunks, II | p. 316 |
Other constructions of deformations | p. 320 |
Construction of Barking Deformations (Constellar Case) | p. 327 |
Notation | p. 327 |
Tensor condition | p. 329 |
Multiple barking (constellar case) | p. 332 |
Criteria for splittability | p. 342 |
Looped trunks | p. 345 |
Further Examples | p. 349 |
Fake singular fibers | p. 349 |
Splitting families which give the same splitting | p. 349 |
Example 1 | p. 351 |
Example 2 | p. 353 |
Three different complete propagations | p. 357 |
Example of a practical computation of a compound barking | p. 360 |
Wild cores | p. 368 |
Replacement and grafting | p. 370 |
Increasing multiplicities of simple crusts | p. 377 |
Singularities of Subordinate Fibers near Cores | |
Singularities of Fibers around Cores | p. 383 |
Branched coverings and ramification points | p. 385 |
Singularities of fibers | p. 393 |
Zeros of the plot function | p. 396 |
The number of subordinate fibers and singularities | p. 400 |
Discriminant functions and tassels | p. 404 |
Determination of the singularities | p. 405 |
Seesaw phenomenon | p. 413 |
Supplement: The case m = ln | p. 417 |
Arrangement Functions and Singularities, I | p. 421 |
Arrangement polynomials | p. 422 |
Vanishing cycles | p. 427 |
Discriminants of arrangement polynomials | p. 430 |
The coefficients of arrangement polynomials take arbitrary values | p. 432 |
Arrangement Functions and Singularities, II | p. 439 |
Theta function | p. 439 |
Genus 1: Arrangement functions | p. 445 |
Riemann theta functions and Riemann factorization | p. 449 |
Genus ≥ 2: Arrangement functions | p. 455 |
Supplement | p. 461 |
Riemann theta function and related topics | p. 461 |
Classification of Atoms of Genus ≤ 5 | |
Classification Theorem | p. 483 |
List of Weighted Crustal Sets for Singular Fibers of Genus ≤ 5 | p. 487 |
Genus 1 | p. 492 |
Stellar singular fibers, <$>A = {\op P}^1<$> | p. 492 |
<$>I_n^{\ast}<$> | p. 496 |
mIn | p. 496 |
Genus 2 | p. 497 |
Stellar singular fibers, <$>A = {\op P}^1<$> | p. 497 |
Stellar singular fibers, genus(A) = 1 | p. 502 |
Self-welding of stellar singular fibers of genus 1 | p. 503 |
Genus 3 | p. 503 |
Stellar singular fibers, <$>A = {\op P}^1<$> | p. 503 |
Stellar singular fibers, genus(A) = 1, 2 | p. 518 |
Self-welding of stellar singular fibers of genus 2 | p. 519 |
Welding of stellar singular fibers of genus 2 and genus 1 | p. 520 |
Genus 4 | p. 521 |
Stellar singular fibers, <$>A = {\op P}^1<$> | p. 521 |
Stellar singular fibers, genus(A) = 1, 2 | p. 541 |
Self-welding and self-connecting of genus 3 or 2 | p. 543 |
Welding of stellar singular fibers of genus 3 and genus 1 | p. 546 |
Welding of stellar singular fibers of genus 2 and genus 2 | p. 546 |
Welding of stellar singular fibers of genus 2, 1, and 1 | p. 547 |
Genus 5 | p. 547 |
Stellar singular fibers, <$>A = {\op P}^1<$> | p. 547 |
Stellar singular fibers, genus(A) = 1, 2, 3 | p. 567 |
Self-welding and self-connecting of genus 4 or 3 | p. 570 |
Welding of stellar singular fibers of genus 4 and genus 1 | p. 574 |
Welding of stellar singular fibers of genus 3 and genus 2 | p. 575 |
Bibliography | p. 581 |
Index | p. 587 |
Table of Contents provided by Publisher. All Rights Reserved. |
ISBN: 9783540333630
ISBN-10: 3540333630
Series: Lecture Notes in Mathematics
Published: 26th July 2006
Format: Paperback
Language: English
Number of Pages: 612
Audience: Professional and Scholarly
Publisher: Springer Nature B.V.
Country of Publication: DE
Dimensions (cm): 23.39 x 15.6 x 3.15
Weight (kg): 0.84
Shipping
Standard Shipping | Express Shipping | |
---|---|---|
Metro postcodes: | $9.99 | $14.95 |
Regional postcodes: | $9.99 | $14.95 |
Rural postcodes: | $9.99 | $14.95 |
How to return your order
At Booktopia, we offer hassle-free returns in accordance with our returns policy. If you wish to return an item, please get in touch with Booktopia Customer Care.
Additional postage charges may be applicable.
Defective items
If there is a problem with any of the items received for your order then the Booktopia Customer Care team is ready to assist you.
For more info please visit our Help Centre.