Download Area, lattice points, and exponential sums by M. N. Huxley PDF

Number Theory

By M. N. Huxley

ISBN-10: 0198534663

ISBN-13: 9780198534662

In analytic quantity idea many difficulties may be "reduced" to these related to the estimation of exponential sums in a single or a number of variables. This publication is an intensive therapy of the advancements bobbing up from the strategy for estimating the Riemann zeta functionality. Huxley and his coworkers have taken this system and tremendously prolonged and superior it. The strong concepts offered right here cross significantly past older tools for estimating exponential sums reminiscent of van de Corput's procedure. the possibility of the strategy is much from being exhausted, and there's enormous motivation for different researchers to aim to grasp this topic. despite the fact that, a person at the moment attempting to examine all of this fabric has the ambitious job of wading via quite a few papers within the literature. This e-book simplifies that job by way of featuring all the appropriate literature and a great a part of the heritage in a single package deal. The booklet will locate its greatest readership between arithmetic graduate scholars and lecturers with a study curiosity in analytic thought; in particular exponential sum tools.

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Additional resources for Area, lattice points, and exponential sums

Sample text

For any e > 0, these points are outside the curve (M - e)C, which has almost the same area as the curve MC if a is small, and they are inside the curve (M + e)C. Let D(M) denote the discrepancy, I N(M) -AM21, where N(M) is the number of lattice points counted under Rule 2. If there are R points on the curve MC, then for e small enough N(M+ E) =N(M- e) +R, so that D(M+ E) +D(M- E) ZR - O(eM). The supremum of the discrepancy is at least R/2. If C is the square with corners (±1, ± 1), then there are 8M lattice points on MC whenever M is an integer.

We see that L(nM)/n2M2 tends to zero, and the common limit, A, of K(nM)/n2M2 and (K(nM)+L(nM))/n2M2 does exist. To show that the limit is independent of M, we use the fact that if n and r are integers with rM

If the side of the squares is 1/M, and you count N squares inside the curve, then the area A is approximately N/M2. As we prefer to deal with integer points, we make the equivalent construction of enlarging the curve C by a factor M, then choosing a Cartesian coordinate system. We Polygons and area 26 p FIG. 2 take the lattice to be the lattice of integer vectors, generated by the two orthogonal unit vectors in the x- and y-directions (Fig. 2). There is an ambiguity about squares cut by the curve.

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