Now showing items 56-70 of 70

    • Semialgebraic CMC surfaces in $\mathbb{R}^3$ with singularities 

      Sampaio, J.E. (2018-06-30)
      In this paper we present a classification of a class of semialgebraic CMC surfaces in $\mathbb{R}^3$ that generalizes the recent classification made by Barbosa and do Carmo in 2016 (complete reference is in the paper), we ...
    • A Short Survey on the Integral Identity Conjecture and Theories of Motivic Integration 

      Thuong, L.Q. (2017-04-04)
      In Kontsevich-Soibelman’s theory of motivic Donaldson-Thomas invariants for 3-dimensional noncommutative Calabi-Yau varieties, the integral identity conjecture plays a crucial role as it involves the existence of these ...
    • A Short Survey on the Integral Identity Conjectureand Theories of Motivic Integration 

      Thuong, L.Q. (2016-12-16)
      In Kontsevich-Soibelman’s theory of motivic Donaldson-Thomas invariants for 3-dimensional noncommutative Calabi-Yau varieties, the integral identity conjecture plays a crucial role as it involves the existence of these ...
    • Singularities in Geometry and Topology 

      Romano, A. (2018-06-18)
      This thesis consists of two different topics that are not related. The thesis has two different and independent parts that can be read in any order. The purpose of this work is to study two topics in singularity theory: ...
    • Singularities of the Hilbert scheme of effective divisors 

      Dan, A. (2017-01-10)
      In this article, we study the Hilbert scheme of effective divisors in smooth hypersurfaces in $\mathbb{P}^3$, a topic not extensively studied. We prove that there exists such effective divisors $D$ satisfying the property: ...
    • Some classes of homeomorphisms that preserve multiplicity and tangent cones 

      Sampaio, J.E. (2018-08-19)
      In this paper it is presented some classes of homeomorphisms that preserve multiplicity and tangent cones of complex analytic sets. Moreover, we present a class of homeomorphisms that has the multiplicity as an invariant ...
    • Some classes of homeomorphisms that preserve multiplicity and tangent cones 

      Sampaio, J.E. (2019-05-28)
      In this paper we present some applications of A'Campo-Lê's Theorem and we study some relations between Zariski's Questions A and B. It is presented some classes of homeomorphisms that preserve multiplicity and tangent cones ...
    • Some classes of homeomorphisms that preserve multiplicity and tangent cones 

      Sampaio, J.E. (2020-01-01)
      In this paper we present some applications of A’Campo-Lˆe’s Theorem and we study some relations between Zariski’s Questions A and B. It is presented some classes of homeomorphisms that preserve multiplicity and tangent ...
    • Some contributions to the theory of singularities and their characteristic classes 

      Pallarés Torres, I.Autoridad BCAM (2021-06-02)
      In this Ph.D. thesis, we give some contributions to the theory of singularities, as well as to the theory of characteristic classes of singular spaces. The first part of this thesis is devoted to the theory of singularities ...
    • A specialization property of index 

      Dan, A.; Kaur, I. (2017-01-10)
      In [Kol13] Kollár defined $i$-th index of a proper scheme over a field. In this note we study how index behaves under specialization, in any characteristic.
    • Surgery formulae for the Seiberg-Witten invariant of plumbed 3-manifolds 

      László, T.; Nagy, J.; Némethi, A.Autoridad BCAM (2017-02)
      Assume that $M(\mathcal{T})$ is a rational homology sphere plumbed 3--manifold associated with a connected negative definite graph $\mathcal{T}$. We consider the combinatorial multivariable Poincar\'e series associated ...
    • Topological invariants of plane curve singularities: Polar quotients and Lojasiewicz gradient exponents 

      Nguyen, H.D.; Pham, T.-S.; Hoàng, P.-D (2019-10-21)
      In this paper, we study polar quotients and Łojasiewicz exponents of plane curve singularities, which are not necessarily reduced. We first show that, for complex plane curve singularities, the set of polar quotients is a ...
    • Topology of Spaces of Valuations and Geometry of Singularities 

      de Felipe, A. (2017-11-11)
      Given an algebraic variety X defined over an algebraically closed field, we study the space RZ(X,x) consisting of all the valuations of the function field of X which are centered in a closed point x of X. We concentrate ...
    • Uniform Lech's inequality 

      Ma, L.; Smirnov, I. (2022)
      Let (R,m) be a Noetherian local ring of dimension d ≥ 2. We prove that if e(R􏰊red) > 1, then the classical Lech’s inequality can be improved uniformly for all m-primary ideals, that is, there exists ε > 0 such that e(I) ...
    • Uniform Lech's inequality 

      Ma, L.; Smirnov, I. (2022)
      Let (R,m) be a Noetherian local ring, and let M be a finitely generated R-module of dimension d. We prove that the set [Formula presented] is bounded below by 1/d!e(R‾) where R‾=R/Ann(M). Moreover, when Mˆ is equidimensional, ...