<?xml version="1.0" encoding="utf-8" standalone="yes"?><urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xhtml="http://www.w3.org/1999/xhtml"><url><loc>https://williamechols.com/projects.html</loc><lastmod>2026-09-04T00:00:00+00:00</lastmod></url><url><loc>https://williamechols.com/posts/sitb_updates.html</loc><lastmod>2026-09-04T00:00:00+00:00</lastmod></url><url><loc>https://williamechols.com/</loc><lastmod>2026-09-04T00:00:00+00:00</lastmod></url><url><loc>https://williamechols.com/posts/improving_snakes_and_coils_with_further_windowed_rerouting.html</loc><lastmod>2026-07-08T00:00:00+00:00</lastmod></url><url><loc>https://williamechols.com/posts/building_symmetric_coils_with_implicit_quotient_beam_search.html</loc><lastmod>2026-07-02T00:00:00+00:00</lastmod></url><url><loc>https://williamechols.com/posts/lengthening_hypercube_snakes_with_windowed_rerouting.html</loc><lastmod>2026-06-26T00:00:00+00:00</lastmod></url><url><loc>https://williamechols.com/posts/nsf_reu_missouri.html</loc><lastmod>2025-07-26T00:00:00+00:00</lastmod></url><url><loc>https://williamechols.com/posts/175_billion_digits_of_gamma_1_5.html</loc><lastmod>2025-05-31T00:00:00+00:00</lastmod></url><url><loc>https://williamechols.com/posts/1_5_trillion_digits_of_log_2.html</loc><lastmod>2021-09-09T00:00:00+00:00</lastmod></url></urlset>