Donde hablamos de las apachetas aledañas a los Nevados de Chuscha

Fil: Beorchia Nigris, Antonio. Centro de Investigaciones Arqueológicas de Alta Montaña (Argentina

Relocalización de la Reina del Cerro en Buenos Aires

Fil: Beorchia Nigris, Antonio. Centro de Investigaciones Arqueológicas de Alta Montaña (Argentina

En pos de la "Momia de los Quilmes" : expediciones de exploración andinística (1984-1996)

Fil: Beorchia Nigris, Antonio. Centro de Investigaciones Arqueológicas de Alta Montaña (Argentina

Canonical map of low codimensional subvarieties

Fix integers $a\geq 1$, $b$ and $c$. We prove that for certain projective varieties $V\subset{\bold P}^r$ (e.g. certain possibly singular complete intersections), there are only finitely many components of the Hilbert scheme parametrizing irreducible, smooth, projective, low codimensional subvarieties $X$ of $V$ such that h^0(X,\Cal O_X(aK_X-bH_X)) \leq \lambda d^{\epsilon_1}+c(\sum_{1\leq h < \epsilon_2}p_g(X^{(h)})), where $d$, $K_X$ and $H_X$ denote the degree, the canonical divisor and the general hyperplane section of $X$, $p_g(X^{(h)})$ denotes the geometric genus of the general linear section of $X$ of dimension $h$, and where $\lambda$, $\epsilon_1$ and $\epsilon_2$ are suitable positive real numbers depending only on the dimension of $X$, on $a$ and on the ambient variety $V$. In particular, except for finitely many families of varieties, the canonical map of any irreducible, smooth, projective, low codimensional subvariety $X$ of $V$, is birational.Comment: 31 page

Generically nef vector bundles on ruled surfaces

The present paper concerns the invariants of generically nef vector bundles on ruled surfaces. By Mehta\u2013Ramanathan Restriction Theorem and by Miyaoka characterization of semistable vector bundles on a curve, the generic nefness can be considered as a weak form of semista- bility. We establish a Bogomolov-type inequality for generically nef vector bundles with nef general fiber restriction on ruled surfaces with no negative section, see Theorem 3.1. This gives an affirmative answer in this case to a problem posed by Peternell [17]. Concerning ruled surfaces with a negative section, we prove a similar result for generically nef vector bundles, with nef and balanced general fiber restriction and with a numerical condition on first Chern class, which is satisfied, for instance, if in its class there is a reduced divisor, see Theorem 3.5. Finally, we use such results to bound the invariants of curve fibrations, which factor through finite covers of ruled surfaces

In-Person Prehealth Advising: Impact Analysis Spring 2017 to Fall 2020

At Utah State University, some of the advising department’s efforts specifically focus on preparing students for study in health professions graduate school. Students considering a career in the health sciences meet with an advisor who has been trained on the nuances of preparing for health professions graduate school. This report explored the association between in-person prehealth advising participation and student persistence to the next term

Generic identifiability of pairs of ternary forms

We prove that two general ternary forms are simultaneously identifiable only in the classical cases of two quadratic and a cubic and a quadratic form. We translate the problem into the study of a certain linear system on a projective bundle on the plane, and we apply techniques from projective and birational geometry to prove that the associated map is not birational

Online Prehealth Advising: Impact Analysis Spring 2017 to Fall 2020

At Utah State University, various online, Canvas-based advising programs complement the traditional in-person advising program. The online prehealth advising service assists students who are considering health professions graduate school. This report explored the association between online prehealth advising participation and student persistence to the next term at Utah State University

On the slope inequalities for extremal curves

The present paper concerns the question of the violation of the r-th inequality for extremal curves in Pr , posed in [KM]. We show that the answer is negative in many cases (Theorem 4.13 and Corollary 4.14). The result is obtained by a detailed analysis of the geometry of extremal curves and their canonical model. As a consequence, we show that particular curves on a Hirzebruch surface do not violate the slope inequalities in a certain range (Theorem 6.4)