{"id":17081,"date":"2026-09-24T13:21:18","date_gmt":"2026-09-24T18:21:18","guid":{"rendered":"https:\/\/uwm.edu\/math\/?post_type=tribe_events&#038;p=17081"},"modified":"2026-09-24T13:21:18","modified_gmt":"2026-09-24T18:21:18","slug":"colloquium-prof-jose-luis-ramirez","status":"publish","type":"tribe_events","link":"https:\/\/uwm.edu\/math\/event\/colloquium-prof-jose-luis-ramirez\/","title":{"rendered":"Colloquium: Prof. Jos\u00e9 Luis Ram\u00edrez"},"content":{"rendered":"<h2><span data-olk-copy-source=\"MessageBody\">From Polyominoes to Fibonacci and Catalan Numbers<\/span><\/h2>\n<div data-olk-copy-source=\"MailCompose\"><span data-olk-copy-source=\"MessageBody\">Polyominoes are simple geometric objects that lead to many interesting and sometimes surprisingly difficult problems in discrete mathematics and theoretical computer science. In this talk, I will introduce polyominoes and discuss two classical questions: tiling problems and the enumeration of polyominoes. I will then focus on a recent family of staircase polyominoes that leads to unexpected connections with two of my favorite integer sequences: the Fibonacci and Catalan numbers. If time permits, I will conclude with some open problems and possible directions for further research.<\/span><\/div>\n<div><\/div>\n<div>Check <a href=\"https:\/\/nam02.safelinks.protection.outlook.com\/?url=https%3A%2F%2Fsites.google.com%2Fsite%2Framirezrjl%2Fhome&amp;data=05%7C02%7Calhana%40uwm.edu%7Ca57f358d133349e752fd08df007bd3c3%7C0bca7ac3fcb64efd89eb6de97603cf21%7C0%7C0%7C639230204004211977%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&amp;sdata=%2BKMAQIdgJUX1K7B0EJ5TELc1%2B5f7nwk%2BJLHDv7vBHDI%3D&amp;reserved=0\">here<\/a> for more information!<\/div>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>From Polyominoes to Fibonacci and Catalan Numbers Polyominoes are simple geometric objects that lead to many interesting and sometimes surprisingly difficult problems in discrete mathematics and theoretical computer science. In this talk, I will introduce polyominoes and discuss two classical &hellip;<\/p>\n","protected":false},"author":30596,"featured_media":0,"template":"","meta":{"_acf_changed":false,"_tribe_events_status":"","_tribe_events_status_reason":"","_tribe_events_is_hybrid":"","_tribe_events_is_virtual":"","_tribe_events_virtual_video_source":"","_tribe_events_virtual_embed_video":"","_tribe_events_virtual_linked_button_text":"","_tribe_events_virtual_linked_button":"","_tribe_events_virtual_show_embed_at":"","_tribe_events_virtual_show_embed_to":[],"_tribe_events_virtual_show_on_event":"","_tribe_events_virtual_show_on_views":"","_tribe_events_virtual_url":"","footnotes":"","uwm_wg_additional_authors":[]},"tags":[],"tribe_events_cat":[41],"class_list":["post-17081","tribe_events","type-tribe_events","status-publish","hentry","tribe_events_cat-colloquia","cat_colloquia"],"uwm_unpublish_requested":false,"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.4 (Yoast SEO v28.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Mathematical Sciences<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/uwm.edu\/math\/event\/colloquium-prof-jose-luis-ramirez\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Colloquium: Prof. Jos\u00e9 Luis Ram\u00edrez\" \/>\n<meta property=\"og:description\" content=\"From Polyominoes to Fibonacci and Catalan Numbers Polyominoes are simple geometric objects that lead to many interesting and sometimes surprisingly difficult problems in discrete mathematics and theoretical computer science. 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