{"id":1602,"date":"2017-11-30T02:38:52","date_gmt":"2017-11-30T07:38:52","guid":{"rendered":"http:\/\/blog.richmond.edu\/math320\/?p=1602"},"modified":"2017-11-30T02:38:52","modified_gmt":"2017-11-30T07:38:52","slug":"what-happened-1128","status":"publish","type":"post","link":"https:\/\/blog.richmond.edu\/math320\/2017\/11\/30\/what-happened-1128\/","title":{"rendered":"What Happened 11\/28"},"content":{"rendered":"<p>Class on Tuesday 11\/28 began with student presentations of solutions to the Homework 9 challenge problems.<\/p>\n<p>We then made the proposition that if <img decoding=\"async\" src=\"https:\/\/s0.wp.com\/latex.php?latex=f%3A%5Ba%2Cb%5D%5Cto+R&#038;bg=ffffff&#038;fg=000&#038;s=0&#038;c=20201002\" alt=\"f:[a,b]&#92;to R\" class=\"latex\" \/> is non-decreasing (i.e. <img decoding=\"async\" src=\"https:\/\/s0.wp.com\/latex.php?latex=f%28x%29%5Cleq+f%28y%29%5C%3B%5Cforall+x%3Cy%5Cin%5Ba%2Cb%5D&#038;bg=ffffff&#038;fg=000&#038;s=0&#038;c=20201002\" alt=\"f(x)&#92;leq f(y)&#92;;&#92;forall x&lt;y&#92;in[a,b]\" class=\"latex\" \/>, then <img decoding=\"async\" src=\"https:\/\/s0.wp.com\/latex.php?latex=%5Cint_a%5Eb+f&#038;bg=ffffff&#038;fg=000&#038;s=0&#038;c=20201002\" alt=\"&#92;int_a^b f\" class=\"latex\" \/> exists.<\/p>\n<p>We then produced an outline of how to prove it, which essentially consisted of 3 steps:<\/p>\n<p>a) choose arbitrary <img decoding=\"async\" src=\"https:\/\/s0.wp.com\/latex.php?latex=%5Cepsilon%3E0&#038;bg=ffffff&#038;fg=000&#038;s=0&#038;c=20201002\" alt=\"&#92;epsilon&gt;0\" class=\"latex\" \/><\/p>\n<p>b) choose <img decoding=\"async\" src=\"https:\/\/s0.wp.com\/latex.php?latex=P_%5Cepsilon%5Cin+P_%7B%5Ba%2Cb%5D%7D&#038;bg=ffffff&#038;fg=000&#038;s=0&#038;c=20201002\" alt=\"P_&#92;epsilon&#92;in P_{[a,b]}\" class=\"latex\" \/>, with a condition that we determined to be <img decoding=\"async\" src=\"https:\/\/s0.wp.com\/latex.php?latex=%28x_k-x_%7Bk-1%7D%3C%5Cfrac%7B%5Cepsilon%7D%7Bf%28b%29-f%28a%29%7D&#038;bg=ffffff&#038;fg=000&#038;s=0&#038;c=20201002\" alt=\"(x_k-x_{k-1}&lt;&#92;frac{&#92;epsilon}{f(b)-f(a)}\" class=\"latex\" \/><\/p>\n<p>c)<img decoding=\"async\" src=\"https:\/\/s0.wp.com\/latex.php?latex=U%28f%2CP_%5Cepsilon%29-L%28f%2CP_%5Cepsilon%29&#038;bg=ffffff&#038;fg=000&#038;s=0&#038;c=20201002\" alt=\"U(f,P_&#92;epsilon)-L(f,P_&#92;epsilon)\" class=\"latex\" \/><\/p>\n<p>We then produced a partial proof of the following:<\/p>\n<p>If <img decoding=\"async\" src=\"https:\/\/s0.wp.com\/latex.php?latex=g%3A%5B0%2C1%5D%5Cto%5B0%2C1%5D&#038;bg=ffffff&#038;fg=000&#038;s=0&#038;c=20201002\" alt=\"g:[0,1]&#92;to[0,1]\" class=\"latex\" \/> is bijective and increasing, then <img decoding=\"async\" src=\"https:\/\/s0.wp.com\/latex.php?latex=%5Cint_0%5E1g%2B%5Cint_0%5E1g%5E%7B-1%7D%3D1&#038;bg=ffffff&#038;fg=000&#038;s=0&#038;c=20201002\" alt=\"&#92;int_0^1g+&#92;int_0^1g^{-1}=1\" class=\"latex\" \/><\/p>\n<p>We first looked at a geometric argument, by drawing an example graph, to show that the sum was in fact 1.<\/p>\n<p>Then, we proved that the integrals on the left side exist.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s0.wp.com\/latex.php?latex=%5Cint_0%5E1g&#038;bg=ffffff&#038;fg=000&#038;s=0&#038;c=20201002\" alt=\"&#92;int_0^1g\" class=\"latex\" \/> followed directly from the proposition we provide the proof outline for<\/p>\n<p>We then showed that <img decoding=\"async\" src=\"https:\/\/s0.wp.com\/latex.php?latex=g%5E%7B-1%7D&#038;bg=ffffff&#038;fg=000&#038;s=0&#038;c=20201002\" alt=\"g^{-1}\" class=\"latex\" \/> must be increasing on the interval, which then allows us to apply the proposition<\/p>\n<p>Finally, we went over the statement of the Fundamental Theorem of Calculus.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Class on Tuesday 11\/28 began with student presentations of solutions to the Homework 9 challenge problems. We then made the proposition that if is non-decreasing (i.e. , then exists. We then produced an outline of how to prove it, which essentially consisted of 3 steps: a) choose arbitrary b) choose , with a condition that [&hellip;]<\/p>\n","protected":false},"author":3527,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[58820,58821],"tags":[],"class_list":["post-1602","post","type-post","status-publish","format-standard","hentry","category-daily-blogs","category-what-happened-today"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p7L4E1-pQ","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/blog.richmond.edu\/math320\/wp-json\/wp\/v2\/posts\/1602","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.richmond.edu\/math320\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.richmond.edu\/math320\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.richmond.edu\/math320\/wp-json\/wp\/v2\/users\/3527"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.richmond.edu\/math320\/wp-json\/wp\/v2\/comments?post=1602"}],"version-history":[{"count":0,"href":"https:\/\/blog.richmond.edu\/math320\/wp-json\/wp\/v2\/posts\/1602\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.richmond.edu\/math320\/wp-json\/wp\/v2\/media?parent=1602"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.richmond.edu\/math320\/wp-json\/wp\/v2\/categories?post=1602"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.richmond.edu\/math320\/wp-json\/wp\/v2\/tags?post=1602"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}