{"id":5,"date":"2019-02-04T15:29:07","date_gmt":"2019-02-04T15:29:07","guid":{"rendered":"https:\/\/math-sites.uncg.edu\/yasaki\/?page_id=5"},"modified":"2024-09-19T11:34:16","modified_gmt":"2024-09-19T15:34:16","slug":"home","status":"publish","type":"page","link":"https:\/\/math-sites.uncg.edu\/yasaki\/","title":{"rendered":"Home"},"content":{"rendered":"\r\n<p><strong>Office:<\/strong>\u00a0Petty 126\u00a0<br \/><strong>Email address:<\/strong>\u00a0d_yasaki@uncg.edu<br \/><strong><a href=\"https:\/\/math-sites.uncg.edu\/people\/directory\/yasaki\/\">Departmental web page<\/a><\/strong><\/p>\r\n\r\n\r\n\r\n<p>Ph.D. in Mathematics, Duke University (2005)\u00a0<br \/>Advisor:\u00a0<a href=\"http:\/\/fds.duke.edu\/db\/aas\/math\/faculty\/saper\/\">Les Saper<\/a><\/p>\r\n\r\n\r\n\r\n<p>Member of the UNCG\u00a0<a href=\"https:\/\/math-sites.uncg.edu\/number-theory\/\">Number Theory Group<\/a>.\u00a0<\/p>\r\n\r\n\r\n\r\n<p>Information about\u00a0<a href=\"https:\/\/math-sites.uncg.edu\/yasaki\/teaching\/\">teaching<\/a>\u00a0can be found in the menu to the left.<\/p>\r\n<p>MFO <a href=\"https:\/\/math-sites.uncg.edu\/yasaki\/wp-content\/uploads\/sites\/18\/2024\/09\/steinberg-random-gl2-talk.pdf\">steinberg-random-gl2-talk<\/a><\/p>\r\n<p>PANTS <a href=\"https:\/\/math-sites.uncg.edu\/yasaki\/wp-content\/uploads\/sites\/18\/2024\/09\/pants-steinberg-random-gl2-talk.pdf\">pants-steinberg-random-gl2-talk<\/a><\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Publications and Preprints<\/h3>\r\n\r\n\r\n\r\n<p>Links below are to published versions and PDF preprint version.<\/p>\r\n\r\n\r\n\r\n<ol class=\"wp-block-list\" reversed=\"\">\r\n<li>with Avner Ash, Random modular symbols, accepted Experimental Mathematics, (2024).\u00a0 (<a href=\"https:\/\/math-sites.uncg.edu\/yasaki\/wp-content\/uploads\/sites\/18\/2024\/09\/steinberg-random-notes-submitted-2.pdf\">PDF<\/a>)<\/li>\r\n<li>with Avner Ash, <a href=\"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S0022314X22002438\">Cohomology of congruence subgroups of <span id=\"MathJax-Element-108-Frame\" class=\"MathJax\"><span id=\"MathJax-Span-746\" class=\"math\"><span id=\"MathJax-Span-747\" class=\"mrow\"><span id=\"MathJax-Span-748\" class=\"msubsup\"><span id=\"MathJax-Span-749\" class=\"texatom\"><span id=\"MathJax-Span-750\" class=\"mrow\"><span id=\"MathJax-Span-751\" class=\"mi\">S<\/span><span id=\"MathJax-Span-752\" class=\"mi\">L<\/span><\/span><\/span><span id=\"MathJax-Span-753\" class=\"mn\">3<\/span><\/span><span id=\"MathJax-Span-754\" class=\"mo\">(<\/span><span id=\"MathJax-Span-755\" class=\"texatom\"><span id=\"MathJax-Span-756\" class=\"mrow\"><span id=\"MathJax-Span-757\" class=\"mi\">\u2124<\/span><\/span><\/span><span id=\"MathJax-Span-758\" class=\"mo\">)<\/span><\/span><\/span><\/span>, Steinberg modules, and real quadratic fields<\/a>. J. Number Theory <span class=\"font-weight-bold\"><span class=\"left-space\">246 <\/span><\/span><span data-testid=\"ap-issue-pubyear\"><span class=\"left-space\">(<\/span>2023)<\/span><span data-testid=\"ap-issue-paging\">,\u00a049\u201386.<\/span><\/li>\r\n<li>with Greg Bell, Austin Lawson, and Neil Pritchard,\u00a0<a href=\"https:\/\/msp.org\/involve\/2022\/15-5\/p01.xhtml\">An exploration of g-adic representations of integers<\/a>, Involve 15 (2022), no. 5, 727-738. (<a href=\"https:\/\/math-sites.uncg.edu\/yasaki\/wp-content\/uploads\/sites\/18\/2024\/05\/CayleyGraphs.pdf\">PDF<\/a>)<\/li>\r\n<li>with Greg Bell, Austin Lawson, and Neil Pritchard,\u00a0<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/The_space_of_persistence_diagrams_has_infinite_asymptotic_dimension.pdf\">The space of persistence diagrams fails to have Yu&#8217;s Property A<\/a>, Topology Proc. 58 (2021), 279-288. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/The_space_of_persistence_diagrams_has_infinite_asymptotic_dimension.pdf\">PDF<\/a>)<\/li>\r\n<li>with David Burns, Rob de Jeu, Herbert Gangl, and Alexander D. Rahm, <a href=\"https:\/\/www.doi.org\/10.1017\/fms.2021.9\">Hyperbolic tessellations and generators of K_3 for imaginary quadratic fields, Forum of Mathematics<\/a>, Forum Math. Sigma 9 (2021), Paper No. e40, 47 pp. (<a href=\"https:\/\/arxiv.org\/abs\/1909.09091\">PDF<\/a>)<\/li>\r\n<li>with Avner Ash, <a href=\"https:\/\/doi.org\/10.1016\/j.jnt.2020.12.014\">Steinberg homology, modular forms, and real quadratic fields<\/a>, Journal of Number Theory 224 (2021), 323-367. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/Ash-Yasaki-GL(2)-submitted-v2.pdf\">PDF<\/a>)<\/li>\r\n<li>with Kristen Scheckelhoff and Kalani Thalagoda, Perfect forms over imaginary quadratic fields, Tbilisi Math. J. special volume on Cohomology, Geometry, Explicit Number Theory (2021), 1\u201312. (<a href=\"https:\/\/arxiv.org\/abs\/2105.00593\">PDF<\/a>)<\/li>\r\n<li>with Jeremy Miller, Peter Patzt, and Jennifer C. H. Wilson,\u00a0<a href=\"https:\/\/doi.org\/10.1112\/topo.12132\">Non-integrality of some Steinberg Modules<\/a>, Journal of Topology 13 (2020), no. 2, 441-459. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/nonintegrality-final.pdf\">PDF<\/a>)<\/li>\r\n<li>with Avner Ash, Paul E. Gunnells, and Mark McConnell,\u00a0<a href=\"https:\/\/doi.org\/10.1017\/S1474748018000117\">On the growth of torsion in the cohomology of arithmetic groups<\/a>, J. Inst. Math. Jussieu 19 (2020), no. 2, 537\u2013569. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/tonsoftorsion.pdf\">PDF<\/a>)<\/li>\r\n<li>with Paul E. Gunnells, and Mark McConnell,\u00a0<a href=\"https:\/\/www.tandfonline.com\/doi\/full\/10.1080\/10586458.2019.1577767\">On the cohomology of congruence subgroups of GL_3 over the Eisenstein integers<\/a>, Experimental Mathematics 30 (2021), no. 4, 4990512. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/gl3neg3.pdf\">PDF<\/a>)<\/li>\r\n<li>with Mathieu Dutour Sikiri\u0107, Herbert Gangl, Paul E. Gunnells, Jonathan Hanke, and Achill Sch\u00fcrmann,\u00a0<a href=\"https:\/\/rdcu.be\/4JJu\">On the topological computation of\u00a0K4\u00a0of the Gaussian and Eisenstein integers<\/a>, J. Homotopy Relat. Struct. 14 (2019), no. 1, 281-291. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/k_theory.pdf\">PDF<\/a>)<\/li>\r\n<li>with Andrew R. Booker, Jeroen Sijsling, Andrew V. Sutherland, and John Voight,\u00a0<a href=\"http:\/\/journals.cambridge.org\/repo_A10KF26\/W1OZ56\">A database of genus 2 curves over the rational numbers<\/a>, LMS J. Comput. Math. 19 (2016), no. suppl. A, 235\u2013254. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/genus2-ants.pdf\">PDF<\/a>)<\/li>\r\n<li>Computation of certain modular forms using Voronoi polytopes, <a href=\"https:\/\/ems.press\/journals\/owr\/articles\/15173\">Computations in the Cohomology of Arithmetic Groups, Mathematisches Forschungsinstitut Oberwolfach<\/a>, no. 52, 2016, extended abstract, pp. 27\u201330. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/OWR_2016_52.pdf\">PDF<\/a>)<\/li>\r\n<li><a href=\"https:\/\/www.mfo.de\/occasion\/1603\/www_view\">Perfect forms over CM quartic fields (extended abstract)<\/a>, Mathematisches Forschungsinstitut Oberwolfach, Report No. 3\/2016, Lattices and Applications in Number Theory. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/OWR_2016_03.pdf\">PDF<\/a>)<\/li>\r\n<li>with Mathieu Dutour Sikiri\u0107, Herbert Gangl, Paul E. Gunnells, Jonathan Hanke, and Achill Sch\u00fcrmann,\u00a0<a href=\"http:\/\/dx.doi.org\/10.1016\/j.jpaa.2015.12.002\">On the cohomology of linear groups over imaginary quadratic fields<\/a>, Journal of Pure and Applied Algebra 220, Issue 7, July 2016, 2564\u20132589. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/HomolArith.pdf\">PDF<\/a>)<\/li>\r\n<li>with Steve Donnelly, Paul E. Gunnells, and Ariah Klages-Mundt,\u00a0<a href=\"http:\/\/dx.doi.org\/10.1080\/10586458.2014.1002141\">A table of elliptic curves over the cubic field of discriminant -23<\/a>, Experimental Mathematics, 24:4 (2015), 375-390. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/neg23paper.pdf\">PDF<\/a>)<\/li>\r\n<li><a href=\"http:\/\/link.springer.com\/book\/10.1007\/978-3-319-03847-6\">Computing modular forms for GL_2 over certain number fields<\/a>, Computations with Modular Forms, Contributions in Mathematical and Computational Sciences 6 (2014), 363-377.<\/li>\r\n<li><a href=\"http:\/\/dx.doi.org\/10.1016\/j.jnt.2013.07.015\">Integral cohomology of certain Picard modular surfaces<\/a>, J. Number Theory 134 (2014) 13-28. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/DSU21.pdf\">PDF<\/a>)<\/li>\r\n<li><a href=\"http:\/\/jtnb.cedram.org\/item?id=JTNB_2013__25_3_759_0\">Perfect unary forms over real quadratic fields<\/a>, J. Th\u00e9or Nombres Bordeaux 25 (2013), no. 3, 759-775. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/real-quad-unary.pdf\">PDF<\/a>)<\/li>\r\n<li>with Paul E. Gunnells,\u00a0<a href=\"http:\/\/www.worldscientific.com\/doi\/abs\/10.1142\/S1793042112501242\">Modular forms and elliptic curves over the cubic field of discriminant \u221223<\/a>, Int. J. Number Theory 9 (2013), no. 1, 53-76. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/complexcubic.pdf\">PDF<\/a>)<\/li>\r\n<li>with Farshid Hajir and Paul E. Gunnells,\u00a0<a href=\"http:\/\/www.tandfonline.com\/doi\/abs\/10.1080\/10586458.2013.736271\">Modular forms and elliptic curves over the field of fifth roots of unity<\/a>, Experimental Mathematics 22 (2013), no. 2, 203-216. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/ghy-zeta5.pdf\">PDF<\/a>)<\/li>\r\n<li><a href=\"https:\/\/www.mfo.de\/occasion\/1129\/www_view\">Computing modular forms using Voronoi polyhedra (extended abstract)<\/a>, Mathematisches Forschungsinstitut Oberwolfach, Report No. 35\/2011, Explicit Methods in Number Theory. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/OWR_2011_35.pdf\">PDF<\/a>)<\/li>\r\n<li>with Adriano Bruno,\u00a0<a href=\"http:\/\/libres.uncg.edu\/ir\/uncg\/f\/D_Yasaki_Arithmetic_2011.pdf\">The arithmetic of planar binary trees<\/a>, Involve 4 (2011), no. 1, 1-11. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/trees_for_print.pdf\">PDF<\/a>)<\/li>\r\n<li><a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/voronoi_RIMS_2011.pdf\">On modular forms and elliptic curves over \\(\\mathbb{Q}(\\zeta_5)\\)<\/a>, RIMS Automorphic forms, trace formulas, and zeta functions (2011), Proceedings. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/voronoi_RIMS_2011.pdf\">PDF<\/a>)<\/li>\r\n<li><a href=\"http:\/\/link.springer.com\/chapter\/10.1007%2F978-3-642-14518-6_30\">Hyperbolic tessellations associated to Bianchi groups<\/a>, 6197 (2010), 385-396, 9th International Symposium, Nancy, France, ANTS-IX, July 19-23, 2010, Proceedings. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/bianchipolytope.pdf\">PDF<\/a>)<\/li>\r\n<li><a href=\"http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0021869309003779?via=ihub\">Binary Hermitian forms over a cyclotomic field<\/a>, J. Algebra 322 (2009), 4132-4142. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/binary_hermitian_over_cyclotomic.pdf\">PDF<\/a>)<\/li>\r\n<li><a href=\"http:\/\/link.springer.com\/article\/10.1007\/s00605-008-0045-3\">Elliptic points of the Picard modular group<\/a>, Monatsh. Math. (2009), no. 156, 391-396. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/elliptic_points.pdf\">PDF<\/a>)<\/li>\r\n<li><a href=\"http:\/\/magma.maths.usyd.edu.au\/magma\/\">Modular forms over imaginary quadratic fields<\/a>, package available in Magma V2.16, 2009.<\/li>\r\n<li><a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/sydney2009.pdf\">Computing Hecke operators on Bianchi forms<\/a>, Tech. Report, Magma computational group: University of Sydney, 2009. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/sydney2009.pdf\">PDF<\/a>)<\/li>\r\n<li>with Paul E. Gunnells, <a href=\"http:\/\/link.springer.com\/chapter\/10.1007%2F978-3-540-79456-1_26\">Hecke operators and Hilbert modular forms<\/a>, Algorithmic number theory, Lecture Notes in Comput. Sci., vol. 5011, Springer, Berlin, 2008, pp. 387-401. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/hilbert.pdf\">PDF<\/a>)<\/li>\r\n<li><a href=\"http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0022314X0700056X\">An explicit spine for the Picard modular group over the Gaussian integers<\/a>, J. Number Theory 128 (2008), no. 1, 207-234. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/SU21.pdf\">PDF<\/a>)<\/li>\r\n<li><a href=\"http:\/\/link.springer.com\/article\/10.1007%2Fs00029-006-0029-x\">On the existence of spines for\u00a0\u211a-rank 1 groups<\/a>, Selecta Math. (N.S.) 12 (2006), no.3-4, 541-564. (<a href=\"https:\/\/math-sites.uncg.edu\/sites\/yasaki\/publications\/rank1.pdf\">PDF<\/a>)<\/li>\r\n<li>On the existence of spines for\u00a0\u211a-rank 1 groups, Ph.D. Thesis, Duke University, 2005.<\/li>\r\n<\/ol>\r\n\r\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Office:\u00a0Petty 126\u00a0Email address:\u00a0d_yasaki@uncg.eduDepartmental web page Ph.D. in Mathematics, Duke University (2005)\u00a0Advisor:\u00a0Les Saper Member of the UNCG\u00a0Number Theory Group.\u00a0 Information about\u00a0teaching\u00a0can be found&#8230;<\/p>\n","protected":false},"author":1,"featured_media":6,"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","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/math-sites.uncg.edu\/yasaki\/wp-json\/wp\/v2\/pages\/5","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/math-sites.uncg.edu\/yasaki\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/math-sites.uncg.edu\/yasaki\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/math-sites.uncg.edu\/yasaki\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/math-sites.uncg.edu\/yasaki\/wp-json\/wp\/v2\/comments?post=5"}],"version-history":[{"count":56,"href":"https:\/\/math-sites.uncg.edu\/yasaki\/wp-json\/wp\/v2\/pages\/5\/revisions"}],"predecessor-version":[{"id":426,"href":"https:\/\/math-sites.uncg.edu\/yasaki\/wp-json\/wp\/v2\/pages\/5\/revisions\/426"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/math-sites.uncg.edu\/yasaki\/wp-json\/wp\/v2\/media\/6"}],"wp:attachment":[{"href":"https:\/\/math-sites.uncg.edu\/yasaki\/wp-json\/wp\/v2\/media?parent=5"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}