{"id":68,"date":"2019-03-01T06:40:43","date_gmt":"2019-03-01T06:40:43","guid":{"rendered":"http:\/\/ddavalos.com\/?page_id=68"},"modified":"2023-10-24T01:47:46","modified_gmt":"2023-10-24T01:47:46","slug":"playing-with-math-symbols","status":"publish","type":"page","link":"https:\/\/ddavalos.com\/index.php\/playing-with-math-symbols\/","title":{"rendered":"Playing with math sym."},"content":{"rendered":"\n<p class=\"has-very-dark-gray-color has-very-light-gray-background-color has-text-color has-background\">Something interesting must come here soon. This webpage is possible thanks to the support of Armando.<\/p>\n\n\n\n<p> <br>Let <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ddavalos.com\/wp-content\/ql-cache\/quicklatex.com-60a3042519bbff12247a1ac81bcd611e_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#92;&#68;&#101;&#108;&#116;&#97;\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"14\" style=\"vertical-align: 0px;\"\/> an operator over the Hilbert space <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ddavalos.com\/wp-content\/ql-cache\/quicklatex.com-173d4d318ade4e23f184a26004cc3766_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#92;&#109;&#97;&#116;&#104;&#99;&#97;&#108;&#123;&#72;&#125;\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"15\" style=\"vertical-align: 0px;\"\/>, we call it <em>bounded<\/em> if there exists a <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ddavalos.com\/wp-content\/ql-cache\/quicklatex.com-ef70e5ae3f51890a98b73c9c01943afe_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#116;&#62;&#48;\" title=\"Rendered by QuickLaTeX.com\" height=\"14\" width=\"39\" style=\"vertical-align: -2px;\"\/> such that <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ddavalos.com\/wp-content\/ql-cache\/quicklatex.com-d8cdb7ab164c9e764ecb3bfe74673fbf_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#124;&#124;&#92;&#68;&#101;&#108;&#116;&#97;&#32;&#124;&#92;&#112;&#115;&#105;&#32;&#92;&#114;&#97;&#110;&#103;&#108;&#101;&#124;&#124;&#92;&#108;&#101;&#113;&#32;&#32;&#116;&#124;&#124;&#124;&#92;&#112;&#115;&#105;&#32;&#92;&#114;&#97;&#110;&#103;&#108;&#101;&#124;&#124;&#32;&#92;&#32;&#92;&#32;&#92;&#102;&#111;&#114;&#97;&#108;&#108;&#32;&#124;&#92;&#112;&#115;&#105;&#32;&#92;&#114;&#97;&#110;&#103;&#108;&#101;&#32;&#92;&#105;&#110;&#32;&#92;&#109;&#97;&#116;&#104;&#99;&#97;&#108;&#123;&#72;&#125;\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"213\" style=\"vertical-align: -5px;\"\/>, with <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ddavalos.com\/wp-content\/ql-cache\/quicklatex.com-47fd213a189c6ad65557096d6f5d72a0_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#124;&#124;&#124;&#92;&#112;&#115;&#105;&#92;&#114;&#97;&#110;&#103;&#108;&#101;&#124;&#124;&#61;&#92;&#115;&#113;&#114;&#116;&#123;&#92;&#108;&#97;&#110;&#103;&#108;&#101;&#32;&#92;&#112;&#115;&#105;&#32;&#124;&#32;&#92;&#112;&#115;&#105;&#32;&#92;&#114;&#97;&#110;&#103;&#108;&#101;&#125;\" title=\"Rendered by QuickLaTeX.com\" height=\"22\" width=\"127\" style=\"vertical-align: -6px;\"\/>. The set of all bounded operators over <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ddavalos.com\/wp-content\/ql-cache\/quicklatex.com-173d4d318ade4e23f184a26004cc3766_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#92;&#109;&#97;&#116;&#104;&#99;&#97;&#108;&#123;&#72;&#125;\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"15\" style=\"vertical-align: 0px;\"\/> is denoted by <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ddavalos.com\/wp-content\/ql-cache\/quicklatex.com-8c19b72342e90150f9c68b960836b1f1_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#92;&#109;&#97;&#116;&#104;&#99;&#97;&#108;&#123;&#66;&#125;&#40;&#92;&#109;&#97;&#116;&#104;&#99;&#97;&#108;&#123;&#72;&#125;&#41;\" title=\"Rendered by QuickLaTeX.com\" height=\"18\" width=\"40\" style=\"vertical-align: -4px;\"\/>. In particular the minimum <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ddavalos.com\/wp-content\/ql-cache\/quicklatex.com-b4e3cbf5d4c5c6d9b702dd139f14c147_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#116;\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"6\" style=\"vertical-align: 0px;\"\/> for which the inequality above holds, is called the <em>operator norm<\/em> of <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ddavalos.com\/wp-content\/ql-cache\/quicklatex.com-60a3042519bbff12247a1ac81bcd611e_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#92;&#68;&#101;&#108;&#116;&#97;\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"14\" style=\"vertical-align: 0px;\"\/>. This norm induces the <em>operator norm topology. <\/em>Such norm is typically too strong for many purposes, a very wide used one is the so called <em>weak operator topology, <\/em>it will be discussed later. <br><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Something interesting must come here soon. This webpage is possible thanks to the support of Armando. Let an operator over the Hilbert space , we call it bounded if there exists a such that , with . The set of all bounded operators over is denoted by . In particular the minimum for which the [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-68","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/ddavalos.com\/index.php\/wp-json\/wp\/v2\/pages\/68","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ddavalos.com\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/ddavalos.com\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/ddavalos.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ddavalos.com\/index.php\/wp-json\/wp\/v2\/comments?post=68"}],"version-history":[{"count":22,"href":"https:\/\/ddavalos.com\/index.php\/wp-json\/wp\/v2\/pages\/68\/revisions"}],"predecessor-version":[{"id":283,"href":"https:\/\/ddavalos.com\/index.php\/wp-json\/wp\/v2\/pages\/68\/revisions\/283"}],"wp:attachment":[{"href":"https:\/\/ddavalos.com\/index.php\/wp-json\/wp\/v2\/media?parent=68"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}