Algebraic Geometry

Download E-books A First Course in Modular Forms (Graduate Texts in Mathematics, Vol. 228) PDF

By Fred Diamond

This booklet introduces the idea of modular kinds, from which all rational elliptic curves come up, with an eye fixed towards the Modularity Theorem. dialogue covers elliptic curves as advanced tori and as algebraic curves; modular curves as Riemann surfaces and as algebraic curves; Hecke operators and Atkin-Lehner thought; Hecke eigenforms and their mathematics homes; the Jacobians of modular curves and the Abelian kinds linked to Hecke eigenforms. because it provides those rules, the booklet states the Modularity Theorem in a variety of varieties, referring to them to one another and concerning their purposes to quantity thought. The authors suppose no historical past in algebraic quantity thought and algebraic geometry. routines are included.

Show description

Read or Download A First Course in Modular Forms (Graduate Texts in Mathematics, Vol. 228) PDF

Best Algebraic Geometry books

Fractured Fractals and Broken Dreams: Self-Similar Geometry through Metric and Measure (Oxford Lecture Series in Mathematics and Its Applications)

Fractal styles have emerged in lots of contexts, yet what precisely is a development? How can one make certain the constructions mendacity inside items and the relationships among them? This publication proposes new notions of coherent geometric constitution to supply a clean method of this universal box. It develops a brand new thought of self-similarity known as "BPI" or "big items of itself," which makes the sector a lot more straightforward for individuals to go into.

The Arithmetic of Elliptic Curves (Graduate Texts in Mathematics)

The idea of elliptic curves is exceptional via its lengthy historical past and through the range of the tools which were utilized in its research. This publication treats the mathematics method in its smooth formula, by utilizing simple algebraic quantity idea and algebraic geometry. Following a quick dialogue of the mandatory algebro-geometric effects, the booklet proceeds with an exposition of the geometry and the formal team of elliptic curves, elliptic curves over finite fields, the complicated numbers, neighborhood fields, and worldwide fields.

Measure, Topology, and Fractal Geometry (Undergraduate Texts in Mathematics)

In line with a direction given to proficient high-school scholars at Ohio college in 1988, this publication is largely a complicated undergraduate textbook concerning the arithmetic of fractal geometry. It well bridges the space among conventional books on topology/analysis and extra really good treatises on fractal geometry.

Extra resources for A First Course in Modular Forms (Graduate Texts in Mathematics, Vol. 228)

Show sample text content

Convey that this situation holds for Γ (N ) if and provided that N < 12. three. nine. three. exhibit that Γ0 (N ) = {±I}Γ1 (N ) for N = 2, three, four. What does this convey approximately dim Mk (Γ0 (N )) and dim Sk (Γ0 (N )) for those values of N ? As a unique case of this, word the formulation dim(M2 (Γ0 (4))) = 2 stated within the context of the 4 squares challenge in part 1. 2. three. nine. four. express that Γ (2) = undeniable approximately determine three. four? zero 0.5 −1 zero −1 {±I}Γ1 (4) zero half −1 zero . What does this ex- three. nine. five. For what values of N does the genus g(X(N )) equivalent zero? 1? four Eisenstein sequence For any congruence subgroup Γ of SL2 (Z), the distance Mk (Γ ) of modular kinds obviously decomposes into its subspace of cusp kinds Sk (Γ ) and the corresponding quotient house Mk (Γ )/Sk (Γ ), the Eisenstein area Ek (Γ ). This bankruptcy supplies bases of Ek (Γ (N )), Ek (Γ1 (N )), and subspaces of Ek (Γ1 (N )) referred to as eigenspaces, together with Ek (Γ0 (N )). the root parts are variations of the Eisenstein sequence from bankruptcy 1. For okay ≥ three they're easy to jot down, yet for okay = 2 and okay = 1 the method is different. other than demonstrating specific examples of modular varieties, computing the Fourier expansions of those Eisenstein sequence leads clearly to similar matters which are attractive of their personal correct: Dirichlet characters, zeta and L-functions, their analytic continuations and sensible equations, Bernoulli numbers and Bernoulli polynomials, Fourier research, theta capabilities, and Mellin transforms. those principles are offered in context because the want arises. they assist to teach extra normal type of Eisenstein sequence, augmented through a fancy parameter, satisfies a sensible equation in addition. on the finish of the bankruptcy they're used to build a modular shape that's on the topic of the equation x3 = d and to the Cubic Reciprocity Theorem because the motivating instance within the book’s preface is said to x2 = d and Quadratic Reciprocity. similar studying: a variety of elements of this fabric are coated within the texts [Gun62], [Hid93], [Kob93], [Miy89], [Lan76], [Sch74], and in sections of the papers [Hec27] and [Hid86]. four. 1 Eisenstein sequence for SL2 (Z) The Eisenstein sequence Gk (τ ) for even okay ≥ four have been defined in bankruptcy 1, as have been the normalized Eisenstein sequence Ek (τ ) = Gk (τ )/(2ζ(k)) with rational Fourier coefficients and best coefficient 1. Recalling primed summation signal ability to sum over nonzero components, compute that 110 four Eisenstein sequence ∞ Gk (τ ) = (c,d)∈Z2 1 = (cτ + d)k n=1 ∞ = 1 ok n n=1 (c,d) gcd(c,d)=1 1 (cτ + d)k (c,d) gcd(c,d)=n 1 = ζ(k) (cτ + d)k (c,d) gcd(c,d)=1 1 . (cτ + d)k those calculations are legitimate because the sequence Gk (τ ) converges completely for all integers okay ≥ three, as proven in workout 1. 1. four. It follows that Ek (τ ) = 1 2 2 (c,d)∈Z gcd(c,d)=1 1 . (cτ + d)k (4. 1) The sequence defining Gk and Ek cancel to 0 for peculiar okay. Define P+ = {[ 10 n1 ] : n ∈ Z}, the optimistic a part of the parabolic subgroup of SL2 (Z). this enables an intrinsic description of the normalized Eisenstein sequence (Exercise four. 1. 1), Ek (τ ) = j(γ, τ )−k .

Rated 4.69 of 5 – based on 16 votes