{"id":1969,"date":"2019-04-01T11:07:15","date_gmt":"2019-04-01T15:07:15","guid":{"rendered":"http:\/\/brickisland.net\/DDGSpring2019\/?p=1969"},"modified":"2019-04-18T11:10:32","modified_gmt":"2019-04-18T15:10:32","slug":"lecture-21-discrete-conformal-geometry","status":"publish","type":"post","link":"https:\/\/brickisland.net\/DDGSpring2019\/2019\/04\/01\/lecture-21-discrete-conformal-geometry\/","title":{"rendered":"Lecture 20: Discrete Conformal Geometry"},"content":{"rendered":"<p>In this lecture we&#8217;ll attempt to translate several smooth characterizations of conformal maps into the discrete setting.  We&#8217;ll also see how each of these attempts leads to a different class of computational algorithms, with different trade offs.  Although conformal maps are often associated with angle preservation, we&#8217;ll see that preserving angles at the discrete level results in a theory that is far to <em>rigid<\/em>: i.e., it does not capture any of the interesting structure of smooth conformal geometry.  Instead, we&#8217;ll see how less-obvious starting points (such as patterns of circles, or preservation of <em>length cross ratios<\/em>) lead to some deep and beautiful connections between the classic smooth picture, and the discrete, combinatorial picture.<\/p>\n<p><a href=\"http:\/\/brickisland.net\/DDGSpring2019\/wp-content\/uploads\/2019\/04\/DDG_458_SP19_Lecture19_ConformalGeometryII.pdf\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/brickisland.net\/DDGSpring2019\/wp-content\/uploads\/2019\/04\/DDG_458_SP19_Lecture19_ConformalGeometryII_icon.jpg\" alt=\"\" width=\"419\" height=\"243\" class=\"alignnone size-full wp-image-1970\" srcset=\"https:\/\/brickisland.net\/DDGSpring2019\/wp-content\/uploads\/2019\/04\/DDG_458_SP19_Lecture19_ConformalGeometryII_icon.jpg 838w, https:\/\/brickisland.net\/DDGSpring2019\/wp-content\/uploads\/2019\/04\/DDG_458_SP19_Lecture19_ConformalGeometryII_icon-300x174.jpg 300w, https:\/\/brickisland.net\/DDGSpring2019\/wp-content\/uploads\/2019\/04\/DDG_458_SP19_Lecture19_ConformalGeometryII_icon-768x445.jpg 768w\" sizes=\"auto, (max-width: 419px) 85vw, 419px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this lecture we&#8217;ll attempt to translate several smooth characterizations of conformal maps into the discrete setting. We&#8217;ll also see how each of these attempts leads to a different class of computational algorithms, with different trade offs. Although conformal maps are often associated with angle preservation, we&#8217;ll see that preserving angles at the discrete level &hellip; <a href=\"https:\/\/brickisland.net\/DDGSpring2019\/2019\/04\/01\/lecture-21-discrete-conformal-geometry\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Lecture 20: Discrete Conformal Geometry&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-1969","post","type-post","status-publish","format-standard","hentry","category-slides"],"_links":{"self":[{"href":"https:\/\/brickisland.net\/DDGSpring2019\/wp-json\/wp\/v2\/posts\/1969","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/brickisland.net\/DDGSpring2019\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/brickisland.net\/DDGSpring2019\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/brickisland.net\/DDGSpring2019\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/brickisland.net\/DDGSpring2019\/wp-json\/wp\/v2\/comments?post=1969"}],"version-history":[{"count":2,"href":"https:\/\/brickisland.net\/DDGSpring2019\/wp-json\/wp\/v2\/posts\/1969\/revisions"}],"predecessor-version":[{"id":1973,"href":"https:\/\/brickisland.net\/DDGSpring2019\/wp-json\/wp\/v2\/posts\/1969\/revisions\/1973"}],"wp:attachment":[{"href":"https:\/\/brickisland.net\/DDGSpring2019\/wp-json\/wp\/v2\/media?parent=1969"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/brickisland.net\/DDGSpring2019\/wp-json\/wp\/v2\/categories?post=1969"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/brickisland.net\/DDGSpring2019\/wp-json\/wp\/v2\/tags?post=1969"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}