{"id":5,"date":"2013-09-10T12:21:12","date_gmt":"2013-09-10T12:21:12","guid":{"rendered":"https:\/\/sites.krieger.jhu.edu\/template-research\/?page_id=5"},"modified":"2026-04-13T13:36:25","modified_gmt":"2026-04-13T17:36:25","slug":"speakers","status":"publish","type":"page","link":"https:\/\/sites.krieger.jhu.edu\/antd\/speakers\/","title":{"rendered":"Spring 2026 Speakers"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">Sunday, April 19, at Johns Hopkins University<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/glucklichrui.github.io\/\" data-type=\"link\" data-id=\"https:\/\/murilocorato.github.io\/\">Rui Chen<\/a> (JHU)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Title: <\/strong>Spherical functions on spherical varieties for unramified groups.<br><strong>Abstract:&nbsp;<\/strong>For G an unramified group over a characteristic zero p-adic local field k with integer ring o,<br>K = G(o) a maximal compact subgroup of G = G(k), and X the k-points of a homogeneous affine G-<br>spherical variety, we discuss a systematic method on computing eigenvectors for H(G, K) on C<sub>c<\/sub><sup>\u221e<\/sup>(X)<sup>K<\/sup>.<br>Our approach breaks down into three main steps: First, we perform a reduction process to simplify this<br>computation to a list of spherical varieties for simply connected, unramified groups of split rank one. Next, we<br>establish generic multiplicity formulas for these spherical varieties. Finally, we study precise local functional<br>equations for the homogeneous affine spherical varieties in our list. This ultimately reduces the problem to<br>unramified computations within the multiplicity-free setting..<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/www.math.umd.edu\/~fchnaras\/\">Foivos Chnaras<\/a> (UMD)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Title: <\/strong>On the Iwasawa invariants of elliptic curves.<br><strong>Abstract:\u00a0<\/strong>Iwasawa theory studies the growth of certain Galois modules, such as class groups or Selmer groups, over infinite towers of number fields called <strong>Z<\/strong><sub>p<\/sub>-extensions. This growth is governed by certain numerical invariants, known as Iwasawa invariants. In this talk, we give an introduction to the subject and focus on the behavior and distribution of the Iwasawa invariants associated with the Selmer group of an Elliptic Curve over <strong>Q<\/strong> at primes of good reduction. In particular, we develop a criterion that determines when these invariants attain their minimal possible value.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/sites.google.com\/view\/rokgregoric\/home\">Rok Gregoric<\/a> (JHU)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Title: <\/strong>Even periodization.<br><strong>Abstract:\u00a0<\/strong>In homotopical algebra, we widen the objects of study from classical rings to their higher analogues. These admit homotopy groups, indexed on the integers, which vanish for classical rings everywhere outside degree 0. On the other extreme of this are periodic rings: ones whose homotopy groups repeat with a certain period. The simplest among these are <em>even<\/em><em>periodic rings<\/em>, 2-periodic rings with vanishing odd-degree homotopy groups.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In this talk, we will discuss some consequences for algebraic geometry that the restriction to such even periodic rings as affines entails. In particular, we will discuss how formal groups naturally occur in this setting, and a connection to prismatization in p-adic geometry.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/www-math.umd.edu\/people\/all-directory\/item\/1668-mjjeon.html\">Myeong Jae Jeon<\/a> (UMD)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Title: <\/strong>Compactification of torsors under reductive groups.<br><strong>Abstract:&nbsp;<\/strong>Given a G-torsor on a dense open subset of a regular variety X, with G a reductive group, I will describe an approach to compactifying such torsors, in the sense of extending them after suitable modifications of the base via blow-ups and root stacks. I will also discuss how this problem relates to compactifying families of geometric objects parametrized by an algebraic stack with a good moduli space. This is based on joint work in progress with Dori Bejleri.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/sites.google.com\/view\/christianklevdal\/home\">Christian Klevdal<\/a> (JHU)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Title: <\/strong>Special and bi-analytic structures in p-adic geometry.<br><strong>Abstract:&nbsp;<\/strong>Period mappings are a fundamental tool in the Hodge theory of complex algebraic varieties. They are highly transcendental, and functional transcendence results like the Ax-Lindemann and Ax-Schanuel theorem govern how these interact with the algebraic geometry of the base variety and a flag variety. In this talk I will give a brief introduction to the functional transcendence of period mappings, and discuss some joint work with Sean Howe about p-adic analogues.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/sites.google.com\/uic.edu\/jzhao\">Junyan Zhao<\/a> (UMD)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Title: <\/strong>K-moduli of Fano threefolds and their anticanonical K3 surfaces.<br><strong>Abstract:&nbsp;<\/strong>We study the K-moduli space of certain Fano threefolds, known as V<sub>22<\/sub>. Unlike those known examples, there is no suitable candidate for this moduli space via GIT, which makes it difficult to understand its degenerations. In this talk, we take a different approach and focus on the boundary of the K-moduli space. We show that all degenerations are governed by four explicit families. The key idea is that such threefolds can be recovered from their anticanonical K3 surfaces. This is joint work with Anne-Sophie Kaloghiros, Yuchen Liu and Andrea Petracci.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Sunday, April 19, at Johns Hopkins University Rui Chen (JHU) Title: Spherical functions on spherical varieties for unramified groups.Abstract:&nbsp;For G an unramified group over a characteristic zero p-adic local field k with integer ring o,K = G(o) a maximal compact subgroup of G = G(k), and X the k-points of a homogeneous affine G-spherical variety, [&hellip;]<\/p>\n","protected":false},"author":40,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-5","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/sites.krieger.jhu.edu\/antd\/wp-json\/wp\/v2\/pages\/5","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sites.krieger.jhu.edu\/antd\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sites.krieger.jhu.edu\/antd\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sites.krieger.jhu.edu\/antd\/wp-json\/wp\/v2\/users\/40"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.krieger.jhu.edu\/antd\/wp-json\/wp\/v2\/comments?post=5"}],"version-history":[{"count":5,"href":"https:\/\/sites.krieger.jhu.edu\/antd\/wp-json\/wp\/v2\/pages\/5\/revisions"}],"predecessor-version":[{"id":535,"href":"https:\/\/sites.krieger.jhu.edu\/antd\/wp-json\/wp\/v2\/pages\/5\/revisions\/535"}],"wp:attachment":[{"href":"https:\/\/sites.krieger.jhu.edu\/antd\/wp-json\/wp\/v2\/media?parent=5"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}