{"id":233,"date":"2017-04-14T14:40:59","date_gmt":"2017-04-14T22:40:59","guid":{"rendered":"https:\/\/matsguru.com\/?p=233"},"modified":"2017-04-14T14:40:59","modified_gmt":"2017-04-14T22:40:59","slug":"surface-deformations-visualizing-homotopies","status":"publish","type":"post","link":"https:\/\/matsguru.com\/?p=233","title":{"rendered":"Surface Deformations: Visualizing Homotopies"},"content":{"rendered":"<p>A homotopy is a (smooth) map which continuously deforms a space nicely (without introducing any singularities).<\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/7JGJk_BhpBc?version=3&#038;loop=1&#038;playlist=7JGJk_BhpBc\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p>I was part of <a href=\"http:\/\/new.math.uiuc.edu\/im2006\/\">illiMath2006<\/a>: an NSF funded Research Experience for Undergraduates (REU) summer program at the University of Illinois at Urbana-Champaign. One of the objectives of the program was to deliver an academia-industry collaborative project centered around a student principal investigator (me). My mentors for the project were <a href=\"http:\/\/www.math.uiuc.edu\/~gfrancis\/\">George Francis at UIUC<\/a>, Stuart Levy at the <a href=\"http:\/\/www.ncsa.illinois.edu\/\">National Center for Supercomputing Applications<\/a>, and Ulises Cervantes-Pimentel at <a href=\"http:\/\/www.wolfram.com\/\">Wolfram Research<\/a>.<\/p>\n<p><a href=\"http:\/\/new.math.uiuc.edu\/im2006\/tsuruga\/\">Our\u00a0project Sakubo<\/a> was such a success that Wolfram Research decided to continue the project the following year when I worked there as a summer 2007 intern. We built szgMathematica (= <a href=\"http:\/\/syzygy.isl.uiuc.edu\/szg\/index.html\">Syzygy<\/a> + Mathematica) which enables users to use Mathematica&#8217;s graphical functions, such as Plot3D or ParametricPlot3D, and view the resulting surfaces in the <a href=\"http:\/\/www.isl.uiuc.edu\/Labs\/CUBE\/CUBE.html\">CUBE<\/a>.<\/p>\n<p>We even built a function that simulated a rollercoaster\u00a0where a user could input any closed parametrized curve for the rollercoaster track. The parametrization controlled the speed of the motion. We tried many closed curves from Mathematica&#8217;s new (at the time) Knot library and found that crazier knots were not as fun to ride as the standard trefoil. Perhaps there was just too much going on.<\/p>\n<p>The second iteration of the project involved many more people. I worked with George Francis at UIUC, Stuart Levy, Camille Goudeseune at the NCSA, Jim Crowell at ISL, and Ulises Cervantes-Pimentel, Joshua Martell at WRI.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A homotopy is a (smooth) map which continuously deforms a space nicely (without introducing any singularities). I was part of illiMath2006: an NSF funded Research Experience for Undergraduates (REU) summer program at the University of Illinois at Urbana-Champaign. One of the objectives of the program was to deliver an academia-industry collaborative project centered around a&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-233","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/matsguru.com\/index.php?rest_route=\/wp\/v2\/posts\/233","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/matsguru.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/matsguru.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/matsguru.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/matsguru.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=233"}],"version-history":[{"count":1,"href":"https:\/\/matsguru.com\/index.php?rest_route=\/wp\/v2\/posts\/233\/revisions"}],"predecessor-version":[{"id":234,"href":"https:\/\/matsguru.com\/index.php?rest_route=\/wp\/v2\/posts\/233\/revisions\/234"}],"wp:attachment":[{"href":"https:\/\/matsguru.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=233"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/matsguru.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=233"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/matsguru.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=233"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}