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</head><body class="body"><span itemscope itemtype="http://schema.org/InformAction"><span style="display:none" itemprop="about" itemscope itemtype="http://schema.org/EmailMessage"><meta itemprop="description" content="Math Seminar: On undecidable mathematical statements."/></span><span itemprop="object" itemscope itemtype="http://schema.org/Event"><meta itemprop="eventStatus" content="http://schema.org/EventScheduled"/><span itemprop="publisher" itemscope itemtype="http://schema.org/Organization"><meta itemprop="name" content="Google Calendar"/></span><meta itemprop="eventId/googleCalendar" content="5r6oimv16ea8va6i8deb8hchar"/><span style="display: none; font-size: 1px; color: #fff; line-height: 1px; height: 0; max-height: 0; width: 0; max-width: 0; opacity: 0; overflow: hidden;" itemprop="name">René Cori - Institut de Mathématiques de Jussieu-Paris Rive Gauche</span><span aria-hidden="true"><time itemprop="startDate" datetime="20241211T120000Z"></time><time itemprop="endDate" datetime="20241211T130000Z"></time></span><table border="0" cellpadding="0" cellspacing="0" role="presentation" align="center" style="width:100%;" class="body-container"><tbody><tr><td style="" class="" align="left"><!--[if mso | IE]><table border="0" cellpadding="0" cellspacing="0" role="presentation"><tr><td height="16" style="height:16px;"><![endif]--><div style="height:16px;" aria-hidden="true"> </div><!--[if mso | IE]></td></tr></table><![endif]--><table border="0" cellpadding="0" cellspacing="0" role="presentation" align="center" style="width:100%;" class=""><tbody><tr><td style="" class="" align="left"><span itemscope itemtype="http://schema.org/EmailMessage"><p itemprop="description">On undecidable mathematical statements.</p></span></td></tr></tbody></table><table border="0" cellpadding="0" cellspacing="0" role="presentation" align="center" style="width:100%;" class=""><tbody><tr><td style="border: solid 1px #dadce0; border-radius: 8px; direction: rtl; font-size: 0; padding: 24px 32px; text-align: left; vertical-align: top;" class="main-container-inner"><!--[if mso | IE]><table border="0" cellpadding="0" cellspacing="0" role="presentation"><tr><![endif]--><div class="" style="font-size: 13px; text-align: left; direction: ltr; display: inline-block; vertical-align: top; width: 100%;overflow: hidden; word-wrap: break-word;"><table border="0" cellpadding="0" cellspacing="0" role="presentation" width="100%" class="main-column-table-ltr" style="padding-right: 32px; padding-left: 0;;table-layout: fixed;"><tbody><tr><td class="main-column-td" style="padding:0; vertical-align:top;"><table border="0" cellpadding="0" cellspacing="0" role="presentation" width="100%" style="table-layout: fixed;"><tr><td style="font-size: 0; padding: 0; text-align: left; word-break: break-word;;padding-bottom:2px;"><div style="font-family: 'Google Sans', Roboto, sans-serif;font-weight: 400; font-size: 22px; line-height: 28px;color: #3c4043; text-decoration: none;" class="primary-text" role="presentation"><span itemprop="name">René Cori - Institut de Mathématiques de Jussieu-Paris Rive Gauche</span></div></td></tr><tr><td style="font-size: 0; padding: 0; text-align: left; word-break: break-word;;padding-bottom:24px;"><div style="font-family: Roboto, sans-serif;font-style: normal; font-weight: 400; font-size: 14px; line-height: 20px; letter-spacing: 0.2px;color: #3c4043; text-decoration: none;" class="primary-text" role="presentation"><span aria-hidden="true"><time itemprop="startDate" datetime="20241211T120000Z"></time><time itemprop="endDate" datetime="20241211T130000Z"></time></span><span>Çarşamba 11 Ara 2024 ⋅ 15:00 – 16:00 (Türkiye Saati)</span></div></td></tr><tr><td style="font-size: 0; padding: 0; text-align: left; word-break: break-word;;padding-bottom:24px;"><div style="font-family: Roboto, sans-serif;font-style: normal; font-weight: 400; font-size: 14px; line-height: 20px; letter-spacing: 0.2px;color: #3c4043; text-decoration: none;" class="primary-text" role="presentation"><span><b>Title: Undecidable mathematical statements<br></b><br><b>Abstract:</b> We all know that in Mathematics, there are statements that can neither be proved nor disproved, such as the axiom of choice or the continuum hypothesis. We also sometimes hear about statements that are "true" but "not provable". But what does all this mean? Are such statements unavoidable? The notion of "model of set theory" helps clarifying these issues. Of course, we need to specify the meaning of "proving"! Starting with elementary facts about groups, we shall explain what a complete theory is and why Mathematics is hopelessly incomplete.</span><meta itemprop="description" content="Title: Undecidable mathematical statementsAbstract: We all know that in Mathematics, there are statements that can neither be proved nor disproved, such as the axiom of choice or the continuum hypothesis. We also sometimes hear about statements that are "true" but "not provable". But what does all this mean? Are such statements unavoidable? The notion of "model of set theory" helps clarifying these issues. Of course, we need to specify the meaning of "proving"! Starting with elementary facts about groups, we shall explain what a complete theory is and why Mathematics is hopelessly incomplete."/></div></td></tr><tr><td style="font-size: 0; padding: 0; text-align: left; word-break: break-word;;padding-bottom:24px;"><div style="font-family: Roboto, sans-serif;font-style: normal; font-weight: 400; font-size: 14px; line-height: 20px; letter-spacing: 0.2px;color: #3c4043; text-decoration: none;" class="primary-text" role="presentation"><table border="0" cellpadding="0" cellspacing="0" role="presentation" style="padding-bottom: 4px;"><tr><td><h2 class="primary-text" style="font-size: 14px;color: #3c4043; text-decoration: none;font-weight: 700;-webkit-font-smoothing: antialiased;margin: 0; padding: 0;">Konum</h2></td></tr></table><span itemprop="location" itemscope itemtype="http://schema.org/Place"><span itemprop="name" class="primary-text notranslate" style="font-family: Roboto, sans-serif;font-style: normal; font-weight: 400; font-size: 14px; line-height: 20px; letter-spacing: 0.2px;color: #3c4043; text-decoration: none;">Room h306 - Galatasaray Üniversitesi, Ortaköy, Çırağan Cd. No:36, 34349 Beşiktaş/İstanbul, Türkiye</span><br/><a href="https://www.google.com/maps/search/Room+h306+-+Galatasaray+%C3%9Cniversitesi,+Ortak%C3%B6y,+%C3%87%C4%B1ra%C4%9Fan+Cd.+No:36,+34349+Be%C5%9Fikta%C5%9F%2F%C4%B0stanbul,+T%C3%BCrkiye?hl=tr" class="accent-text underline-on-hover" style="display: inline-block;;color: #1a73e8; text-decoration: none;font-weight: 700;" target="_blank" itemprop="map">Haritayı görüntüleyin</a></span></div></td></tr><tr><td style="font-size: 0; padding: 0; text-align: left; word-break: break-word;;padding-bottom:24px;"><div style="font-family: Roboto, sans-serif;font-style: normal; font-weight: 400; font-size: 14px; line-height: 20px; letter-spacing: 0.2px;color: #3c4043; text-decoration: none;" class="primary-text" role="presentation"><table border="0" cellpadding="0" cellspacing="0" role="presentation" style="padding-bottom: 4px;"><tr><td><h2 class="primary-text" style="font-size: 14px;color: #3c4043; text-decoration: none;font-weight: 700;-webkit-font-smoothing: antialiased;margin: 0; padding: 0;">Düzenleyen</h2></td></tr></table><div style="color: #3c4042;"><span class="notranslate"><a class="primary-text underline-on-hover" style="display: inline-block;;color: #3c4043; text-decoration: none;" href="mailto:mathseminar@galatasaray.education">Math Seminar</a></span><span itemprop="organizer" itemscope itemtype="http://schema.org/Person"><meta itemprop="name" content="Math Seminar"/><meta itemprop="email" content="mathseminar@galatasaray.education"/></span></div><div style="color: #707579;"><a class="secondary-text underline-on-hover" style="display: inline-block;;color: #70757a; text-decoration: none;" href="mailto:mathseminar@galatasaray.education">mathseminar@galatasaray.education</a></div></div></td></tr><tr><td style="font-size: 0; padding: 0; text-align: left; word-break: break-word;;padding-bottom:24px;"><div style="font-family: Roboto, sans-serif;font-style: normal; font-weight: 400; font-size: 14px; line-height: 20px; letter-spacing: 0.2px;color: #3c4043; text-decoration: none;" class="primary-text" role="presentation"><table border="0" cellpadding="0" cellspacing="0" role="presentation" style="padding-bottom: 4px;"><tr><td><h2 class="primary-text" style="font-size: 14px;color: #3c4043; text-decoration: none;font-weight: 700;-webkit-font-smoothing: antialiased;margin: 0; padding: 0;">Davetliler</h2></td></tr></table><div style="padding-bottom: 4px; text-align: left;;color: #3c4042;"></div></div></td></tr></table></td></tr></tbody></table></div><!--[if mso | IE]></tr></table><![endif]--></td></tr></tbody></table></td></tr></tbody></table></span></span></body></html>