Luca Prelli
In this paper we define specialization and microlocalization for subanalytic sheaves. Applying these functors to the sheaves of tempered and Whytney holomorphic functions we get a unifying description of tempered and formal microlocalization using the theory of subanalytic sheaves.
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This is an announcement of a long paper in progress. On a locally compact space, we introduce the stack of ind-sheaves (ind-objects of the category of sheaves with compact support) and construct the analogous of the usual six operations on sheaves. As an application, we treat, in the formalism of ind-sheaves, functions with growth conditions such as the ``tempered holomorphic functions'' on a complex manifold. We also construct a microlocalization functor from the category of sheaves on a manifold to that of ind-sheaves on the cotangent bundle.
Characteristic cycles of constructible sheaves and microlocalization
研究正特征域上光滑概型可构造层的奇异支撑和特征圈，探讨类似超越情形的微局部化构造在代数情形的可行性，取得部分肯定成果。
In Asterisque 271 the authors introduced the notion of ind-sheaf, and defined the six Grothendieck operations in this framework. They defined subanalytic sheaves and they obtained the formalism of the six Grothendieck operations by including subanalytic sheaves into the category of ind-sheaves. The aim of this paper is to give a direct construction of the six Grothendieck operations in the framework of subanalytic sites avoiding the heavy theory of ind-sheaves. As an application we show how to recover the subanalytic sheaves of temperate and Whitney holomorphic functions.
Let X be a C-infinity manifold. We construct a microlocalization functor $μ_X$ from the derived category of bounded complexes of ind-sheaves on X to the one on the cotangent bundle of X. This functor generalizes the classical theory of microlocalization.
Given a projection $f$ of a product of real analytic manifolds onto one factor, let us say, $S$, and a subanalytic sheaf $\mathcal{F}$ on the associated subanalytic site, we give a natural construction of the (subanalytic) relative sheaf $\mathcal{F}^S$. Applying our construction to the subanalytic sheaves of tempered distributions, holomorphic functions and Whitney $\mathcal{C}^{\infty}$-functions we obtain their relative versions and study their properties.
Irregular Riemann-Hilbert Correspondence and Enhanced Subanalytic Sheaves
本文通过定义增强亚解析层的C-可构造性，建立了其三角范畴与全纯D-模范畴之间的范畴等价，从而推广了非正则黎曼-希尔伯特对应。
Here we prove that the homological dimension of the category of sheaves on a topological space satisfying some suitable conditions is finite. In particular, we find conditions to bound the homological dimension of o-minimal and subanalytic sheaves.
Note on Relation between Enhanced Ind-Sheaves and Enhanced Subanalytic Sheaves
本文通过阐明增强归纳层与增强亚解析层之间的关系，解释了D'Agnolo–Kashiwara与Kashiwara关于全纯D-模及不规则全纯D-模的Riemann-Hilbert对应定理之间的联系。
For a complex manifold $X$ the ring of microdifferential operators $\E_X$ acts on the microlocalization $μhom(F,Ø_X)$, for $F$ in the derived category of sheaves on $X$. Kashiwara, Schapira, Ivorra, Waschkies proved, as a byproduct of their new microlocalization functor for ind-sheaves, $μ_X$, that $μhom(F,Ø_X)$ can in fact be defined as an object of the derived category of $\E_X$-modules: this follows from the fact that $μ_X Ø_X$ is concentrated in one degree. In this paper we prove that the tempered microlocalization also is an object of the derived category of $\E_X$-modules. Since we don't…
Enhanced ind-sheaves provide a suitable framework for the irregular Riemann-Hilbert correspondence. In this paper, we show how Sato's specialization and microlocalization functors have a natural enhancement, and discuss some of their properties.
We give a new construction of sheaves on a relative site associated to a product $X\times S$ where $S$ plays the role of a parameter space, expanding the previous construction by the same authors, where the subanalytic structure on $S$ was required. Here we let this last condition fall. In this way the construction becomes much easier to apply when dimension of $S$ is bigger than one. We also study the functorial properties of base change with respect to the parameter space.
Enhanced Perverse Subanalytic Sheaves
该数学代数几何领域研究在前期增强次解析层ℂ-可构性及对应三角范畴等价成果基础上，证明ℂ-可构增强次解析层三角范畴存在等价于全纯𝒟-模阿贝尔范畴的t-结构心，并研究其单对象与极小扩张。
In this paper we give a construction of conic sheaves on a subanalytic site and we extend the Fourier-Sato transform to this framework. Let E be a n dimensional complex vector space and let E^* be its dual. As an application we construct the conic sheaves $\OO^t_{E_{\RP}}$ and $\OO^w_{E_{\RP}}$ of tempered and Whitney holomorphic functions respectively and we give a sheaf theoretical interpretation of the Laplace isomorphisms of Kashiwara and Schapira which give the isomorphisms in the derived category $\OO^{t\land}_{E_{\RP}}[n] \simeq \OO^t_{E^*_{\RP}}$ and $\OO^{w\land}_{E_{\RP}}[n] \simeq \…
On a real analytic manifold M, we construct the linear subanalytic Grothendieck topology Msal together with the natural morphism of sites $ρ$ from Msa to Msal, where Msa is the usual subanalytic site. Our first result is that the derived direct image functor by $ρ$ admits a right adjoint, allowing us to associate functorially a sheaf (in the derived sense) on Msa to a presheaf on Msa satisfying suitable properties, this sheaf having the same sections that the presheaf on any open set with Lipschitz boundary. We apply this construction to various presheaves on real manifolds, such as the preshe…
Singular supports, characteristic cycles, and microlocalization of constructible sheaves
本文证明Saito微局部奇异支集包含于Beilinson奇异支集，回答Saito问题，并解决相关支集估计猜想，证明特征类猜想。
The aim of this paper is to give a unifying description of various constructions (subanalytic, semialgebraic, o-minimal site) using the notion of T-topology. We then study the category of T-sheaves.
On a smooth algebraic variety over $\mathbb{C}$, we build the tempered subanalytic and Stein tempered subanalytic sites. We construct the sheaf of holomorphic functions tempered at infinity over these sites and study their relations with the sheaf of regular functions, proving in particular that these sheaves are isomorphic on Zariski open subsets. We show that these data allow to define the functors of tempered and Stein tempered analytifications. We study the relations between these two functors and the usual analytification functor. We also obtain algebraization results in the non-proper ca…
The aim of this paper is to develop a theory of microdifferential operators for arithmetic $\mathscr{D}$-modules. We first define the sheaves of microdifferential operators of arbitrary levels on arbitrary smooth formal schemes. A difficulty lies in the fact that there are no homomorphisms between sheaves of microdifferential operators of different levels. To remedy this, we define the intermediate differential operators, and using these, we define the sheaf of microdifferential operators for $\mathscr{D}^†$. We conjecture that the characteristic variety of a $\mathscr{D}^†$-module is computed…
In this paper we prove the constructibility on the subanalytic sites of the sheaves of tempered holomorphic solutions of holonomic D-modules on complex analytic manifolds. Such a result solves a conjecture of M. Kashiwara and P. Schapira (2003).
Let X be a complex curve, $X_{sa}$ the subanalytic site associated to X, M a holonomic $D_X$-module. Let $O^t$ be the sheaf on $X_{sa}$ of tempered holomorphic functions, Sol(M) (resp. $Sol^t$(M)) the complex of holomorphic (resp. tempered holomorphic) solutions of M. We prove that the natural morphism from $H^1 Sol^t$(M) to $H^1$Sol(M) is an isomorphism of sheaves on $X_{sa}$. As a consequence, we prove that $Sol^t$(M) is R-constructible in the sense of sheaves on $X_{sa}$. Such a result is conjectured by M. Kashiwara and P. Schapira in Astérisque 284 in any dimension.
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