{"id":345,"date":"2025-12-29T15:52:38","date_gmt":"2025-12-29T07:52:38","guid":{"rendered":"https:\/\/www.math.ntnu.edu.tw\/coidap\/?p=345"},"modified":"2026-01-05T14:12:51","modified_gmt":"2026-01-05T06:12:51","slug":"1141210speech","status":"publish","type":"post","link":"https:\/\/www.math.ntnu.edu.tw\/coidap\/2025\/12\/29\/1141210speech\/","title":{"rendered":"<span style=\"color:#3566BD\">[\u5c08\u984c\u6f14\u8b1b] <\/span>\u301012\u670810\u65e5\u3011Harry Richman \/ A Ricci flow on graphs from effective resistance"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"345\" class=\"elementor elementor-345\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-20a16be3 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"20a16be3\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c28fdda\" data-id=\"c28fdda\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3abda640 elementor-widget elementor-widget-heading\" data-id=\"3abda640\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">A Ricci flow on graphs from effective resistance<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2e476b56 elementor-widget elementor-widget-spacer\" data-id=\"2e476b56\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-25ccec47 elementor-widget elementor-widget-text-editor\" data-id=\"25ccec47\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong><span style=\"color: #000080; font-family: \u5fae\u8edf\u6b63\u9ed1\u9ad4; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal;\">Time:<\/span><span style=\"color: #000080; font-family: \u5fae\u8edf\u6b63\u9ed1\u9ad4; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal;\"> Dec. 10<\/span><\/strong><span style=\"color: #000080; font-family: \u5fae\u8edf\u6b63\u9ed1\u9ad4; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: bold;\"> (Wed.) 14:20-15:10<br \/><\/span><span style=\"color: #000080; font-family: \u5fae\u8edf\u6b63\u9ed1\u9ad4; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: bold;\">Venue: M212, Gongguan Campus, NTNU<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7f105c55 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"7f105c55\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div style=\"list-style: none; font-family: \u5fae\u8edf\u6b63\u9ed1\u9ad4; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; margin-top: 10px; font-size: 22px; line-height: 26px; text-align: center; color: #cc6633; font-weight: bold;\"><p>Postdoc\u00a0 Harry Richman<\/p><h4>National Center for Theoretical Sciences<br \/>\u570b\u5bb6\u7406\u8ad6\u79d1\u5b78\u7814\u7a76\u4e2d\u5fc3<\/h4><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-17600b6d elementor-widget elementor-widget-spacer\" data-id=\"17600b6d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-43dee741 elementor-widget elementor-widget-text-editor\" data-id=\"43dee741\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Ricci flow is a tool for deforming a smooth manifold into a &#8220;standard&#8221; one within the same homeomorphism class. We introduce a new analogue of Ricci curvature for finite weighted graphs, based on the concept of effective resistance. The corresponding Ricci flow on graphs satisfies many properties shared by Ricci flow on manifolds. I will describe some of the ideas behind this definition, coming from arithmetic geometry, and demonstrate with some examples. I will also mention how Ricci flow on graphs can be applied to the real-world problem of community detection.<\/p><p>More Information:\u00a0<a href=\"https:\/\/ncts.ntu.edu.tw\/people_detail.php?gid=453&amp;bgid=7\" target=\"_blank\" rel=\"noopener\">https:\/\/ncts.ntu.edu.tw\/people_detail.php?gid=453&amp;bgid=7<\/a><\/p><p><em><u>Sponsored by &#8220;Higher Education Sprout Projec<\/u><\/em><em><u>t&#8221; of National Taiwa<\/u><\/em><em><u>n Normal University<\/u><\/em><img decoding=\"async\" class=\"wp-image-252 alignright\" src=\"https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-content\/uploads\/2025\/12\/LOGO100-1-273x300.png\" alt=\"\" width=\"52\" height=\"57\" srcset=\"https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-content\/uploads\/2025\/12\/LOGO100-1-273x300.png 273w, https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-content\/uploads\/2025\/12\/LOGO100-1.png 326w\" sizes=\"(max-width: 52px) 100vw, 52px\" \/><img decoding=\"async\" class=\"wp-image-251 alignright\" src=\"https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-content\/uploads\/2025\/12\/Center_logo_transparent-1-300x297.jpg\" alt=\"\" width=\"50\" height=\"50\" srcset=\"https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-content\/uploads\/2025\/12\/Center_logo_transparent-1-300x297.jpg 300w, https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-content\/uploads\/2025\/12\/Center_logo_transparent-1-150x150.jpg 150w, https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-content\/uploads\/2025\/12\/Center_logo_transparent-1-600x600.jpg 600w, https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-content\/uploads\/2025\/12\/Center_logo_transparent-1.jpg 645w\" sizes=\"(max-width: 50px) 100vw, 50px\" \/><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5d93ac43 elementor-widget elementor-widget-image\" data-id=\"5d93ac43\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1240\" height=\"758\" src=\"https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-content\/uploads\/2025\/12\/\u6f14\u8b1b\u6a19\u5c3e.jpg\" class=\"attachment-full size-full wp-image-245\" alt=\"\" srcset=\"https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-content\/uploads\/2025\/12\/\u6f14\u8b1b\u6a19\u5c3e.jpg 1240w, https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-content\/uploads\/2025\/12\/\u6f14\u8b1b\u6a19\u5c3e-300x183.jpg 300w, https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-content\/uploads\/2025\/12\/\u6f14\u8b1b\u6a19\u5c3e-1024x626.jpg 1024w, https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-content\/uploads\/2025\/12\/\u6f14\u8b1b\u6a19\u5c3e-768x469.jpg 768w\" sizes=\"(max-width: 1240px) 100vw, 1240px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>A Ricci flow on graphs from effective resistance Time:  [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"0","ocean_second_sidebar":"0","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"0","ocean_custom_header_template":"0","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"0","ocean_menu_typo_font_family":"0","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"0","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"on","ocean_gallery_id":[],"footnotes":""},"categories":[36,6],"tags":[],"class_list":["post-345","post","type-post","status-publish","format-standard","hentry","category-activity","category-news","entry"],"_links":{"self":[{"href":"https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-json\/wp\/v2\/posts\/345","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-json\/wp\/v2\/comments?post=345"}],"version-history":[{"count":11,"href":"https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-json\/wp\/v2\/posts\/345\/revisions"}],"predecessor-version":[{"id":529,"href":"https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-json\/wp\/v2\/posts\/345\/revisions\/529"}],"wp:attachment":[{"href":"https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-json\/wp\/v2\/media?parent=345"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-json\/wp\/v2\/categories?post=345"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.math.ntnu.edu.tw\/coidap\/wp-json\/wp\/v2\/tags?post=345"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}