<span itemscope itemtype="http://schema.org/InformAction"><span style="display:none" itemprop="about" itemscope itemtype="http://schema.org/Person"><meta itemprop="description" content="Invitation from julianbrunner@gmail.com"/></span><span itemprop="object" itemscope itemtype="http://schema.org/Event"><div style=""><table cellspacing="0" cellpadding="8" border="0" summary="" style="width:100%;font-family:Arial,Sans-serif;border:1px Solid #ccc;border-width:1px 2px 2px 1px;background-color:#fff;"><tr><td><meta itemprop="eventStatus" content="http://schema.org/EventScheduled"/><h4 style="padding:6px 0;margin:0 0 4px 0;font-family:Arial,Sans-serif;font-size:13px;line-height:1.4;border:1px Solid #fff;background:#fff;color:#090;font-weight:normal"><strong>You have been invited to the following event.</strong></h4><div style="padding:2px"><span itemprop="publisher" itemscope itemtype="http://schema.org/Organization"><meta itemprop="name" content="Google Calendar"/></span><meta itemprop="eventId/googleCalendar" content="7722flahrul0e3tbpq27qi4o9l"/><h3 style="padding:0 0 6px 0;margin:0;font-family:Arial,Sans-serif;font-size:16px;font-weight:bold;color:#222"><span itemprop="name">Manipulating Sums and Related Operators in Isabelle/HOL</span></h3><table style="display:inline-table" cellpadding="0" cellspacing="0" border="0" summary="Event details"><tr><td style="padding:0 1em 10px 0;font-family:Arial,Sans-serif;font-size:13px;color:#888;white-space:nowrap;width:90px" valign="top"><div><i style="font-style:normal">When</i></div></td><td style="padding-bottom:10px;font-family:Arial,Sans-serif;font-size:13px;color:#222" valign="top"><div style="text-indent:-1px"><time itemprop="startDate" datetime="20200212T132500Z"></time><time itemprop="endDate" datetime="20200212T135000Z"></time>Wed Feb 12, 2020 14:25 – 14:50 <span style="color:#888">Central European Time - Berlin</span></div></td></tr><tr><td style="padding:0 1em 10px 0;font-family:Arial,Sans-serif;font-size:13px;color:#888;white-space:nowrap;width:90px" valign="top"><div><i style="font-style:normal">Where</i></div></td><td style="padding-bottom:10px;font-family:Arial,Sans-serif;font-size:13px;color:#222" valign="top"><div style="text-indent:-1px"><span itemprop="location" itemscope itemtype="http://schema.org/Place"><span itemprop="name" class="notranslate">MI 00.09.038 (Turing)</span><span dir="ltr"> (<a href="https://www.google.com/maps/search/MI+00.09.038+%28Turing%29?hl=en" style="color:#20c;white-space:nowrap" target="_blank" itemprop="map">map</a>)</span></span></div></td></tr><tr><td style="padding:0 1em 10px 0;font-family:Arial,Sans-serif;font-size:13px;color:#888;white-space:nowrap;width:90px" valign="top"><div><i style="font-style:normal">Calendar</i></div></td><td style="padding-bottom:10px;font-family:Arial,Sans-serif;font-size:13px;color:#222" valign="top"><div style="text-indent:-1px">club2@mailbroy.informatik.tu-muenchen.de</div></td></tr><tr><td style="padding:0 1em 10px 0;font-family:Arial,Sans-serif;font-size:13px;color:#888;white-space:nowrap;width:90px" valign="top"><div><i style="font-style:normal">Who</i></div></td><td style="padding-bottom:10px;font-family:Arial,Sans-serif;font-size:13px;color:#222" valign="top"><table cellspacing="0" cellpadding="0"><tr><td style="padding-right:10px;font-family:Arial,Sans-serif;font-size:13px;color:#222;width:10px"><div style="text-indent:-1px"><span style="font-family:Courier New,monospace">•</span></div></td><td style="padding-right:10px;font-family:Arial,Sans-serif;font-size:13px;color:#222"><div style="text-indent:-1px"><div><div style="margin:0 0 0.3em 0"><span class="notranslate">julianbrunner@gmail.com</span><span style="font-size:11px;color:#888"> - creator</span></div></div></div></td></tr><tr><td style="padding-right:10px;font-family:Arial,Sans-serif;font-size:13px;color:#222;width:10px"><div style="text-indent:-1px"><span style="font-family:Courier New,monospace">•</span></div></td><td style="padding-right:10px;font-family:Arial,Sans-serif;font-size:13px;color:#222"><div style="text-indent:-1px"><div><div style="margin:0 0 0.3em 0"><span itemprop="attendee" itemscope itemtype="http://schema.org/Person"><span itemprop="name" class="notranslate">madlener@in.tum.de</span><meta itemprop="email" content="madlener@in.tum.de"/></span></div></div></div></td></tr><tr><td style="padding-right:10px;font-family:Arial,Sans-serif;font-size:13px;color:#222;width:10px"><div style="text-indent:-1px"><span style="font-family:Courier New,monospace">•</span></div></td><td style="padding-right:10px;font-family:Arial,Sans-serif;font-size:13px;color:#222"><div style="text-indent:-1px"><div><div style="margin:0 0 0.3em 0"><span itemprop="attendee" itemscope itemtype="http://schema.org/Person"><span itemprop="name" class="notranslate">club2@mailbroy.informatik.tu-muenchen.de</span><meta itemprop="email" content="club2@mailbroy.informatik.tu-muenchen.de"/></span></div></div></div></td></tr></table></td></tr></table><div style="float:right;font-weight:bold;font-size:13px"> <a href="https://www.google.com/calendar/event?action=VIEW&eid=NzcyMmZsYWhydWwwZTN0YnBxMjdxaTRvOWwgY2x1YjJAbWFpbGJyb3kuaW5mb3JtYXRpay50dS1tdWVuY2hlbi5kZQ&tok=NTIjc2U2ZWJlM3RvZmY0Y2g1bm11bmlibTVtOThAZ3JvdXAuY2FsZW5kYXIuZ29vZ2xlLmNvbWFjYmZlMjFhZWRjNjhhY2JjMTNlNmYwNzg3NzVjNWY3NjA2NThhYzY&ctz=Europe%2FBerlin&hl=en&es=0" style="color:#20c;white-space:nowrap" itemprop="url">more details »</a><br></div><div style="padding-bottom:15px;font-family:Arial,Sans-serif;font-size:13px;color:#222;white-space:pre-wrap!important;white-space:-moz-pre-wrap!important;white-space:-pre-wrap!important;white-space:-o-pre-wrap!important;white-space:pre;word-wrap:break-word"><span>Speaker: Christoph Madlener<br>Type: Bachelor's Thesis Presentation<br>Abstract: When using Isabelle/HOL’s simplifier, seemingly trivial rules need to be made explicit. We analyze this phenomenon on the usage of rules related to sums and products. Based on this analysis, we implement and evaluate two simple approaches to enable using more rules implicitly. We conclude that more sophisticated approaches are required on top of our work to be truly useful. Additionally, we implemented a new method for proving reindex operations – think index-shifts – on products and sums. Building specialized proof methods is a trade-off between ease of development and general applicability. Many new specialized methods do not solve the initial problem but can be a valuable tool nonetheless.</span><meta itemprop="description" content="Speaker: Christoph Madlener
Type: Bachelor's Thesis Presentation
Abstract: When using Isabelle/HOL’s simplifier, seemingly trivial rules need to be made explicit. We analyze this phenomenon on the usage of rules related to sums and products. Based on this analysis, we implement and evaluate two simple approaches to enable using more rules implicitly. We conclude that more sophisticated approaches are required on top of our work to be truly useful. Additionally, we implemented a new method for proving reindex operations – think index-shifts – on products and sums. Building specialized proof methods is a trade-off between ease of development and general applicability. Many new specialized methods do not solve the initial problem but can be a valuable tool nonetheless."/></div></div><p style="color:#222;font-size:13px;margin:0"><span style="color:#888">Going (club2@mailbroy.informatik.tu-muenchen.de)? </span><wbr><strong><span itemprop="potentialaction" itemscope itemtype="http://schema.org/RsvpAction"><meta itemprop="attendance" content="http://schema.org/RsvpAttendance/Yes"/><span itemprop="handler" itemscope itemtype="http://schema.org/HttpActionHandler"><link itemprop="method" href="http://schema.org/HttpRequestMethod/GET"/><a href="https://www.google.com/calendar/event?action=RESPOND&eid=NzcyMmZsYWhydWwwZTN0YnBxMjdxaTRvOWwgY2x1YjJAbWFpbGJyb3kuaW5mb3JtYXRpay50dS1tdWVuY2hlbi5kZQ&rst=1&tok=NTIjc2U2ZWJlM3RvZmY0Y2g1bm11bmlibTVtOThAZ3JvdXAuY2FsZW5kYXIuZ29vZ2xlLmNvbWFjYmZlMjFhZWRjNjhhY2JjMTNlNmYwNzg3NzVjNWY3NjA2NThhYzY&ctz=Europe%2FBerlin&hl=en&es=0" style="color:#20c;white-space:nowrap" itemprop="url">Yes</a></span></span><span style="margin:0 0.4em;font-weight:normal"> - </span><span itemprop="potentialaction" itemscope itemtype="http://schema.org/RsvpAction"><meta itemprop="attendance" content="http://schema.org/RsvpAttendance/Maybe"/><span itemprop="handler" itemscope itemtype="http://schema.org/HttpActionHandler"><link itemprop="method" href="http://schema.org/HttpRequestMethod/GET"/><a href="https://www.google.com/calendar/event?action=RESPOND&eid=NzcyMmZsYWhydWwwZTN0YnBxMjdxaTRvOWwgY2x1YjJAbWFpbGJyb3kuaW5mb3JtYXRpay50dS1tdWVuY2hlbi5kZQ&rst=3&tok=NTIjc2U2ZWJlM3RvZmY0Y2g1bm11bmlibTVtOThAZ3JvdXAuY2FsZW5kYXIuZ29vZ2xlLmNvbWFjYmZlMjFhZWRjNjhhY2JjMTNlNmYwNzg3NzVjNWY3NjA2NThhYzY&ctz=Europe%2FBerlin&hl=en&es=0" style="color:#20c;white-space:nowrap" itemprop="url">Maybe</a></span></span><span style="margin:0 0.4em;font-weight:normal"> - </span><span itemprop="potentialaction" itemscope itemtype="http://schema.org/RsvpAction"><meta itemprop="attendance" content="http://schema.org/RsvpAttendance/No"/><span itemprop="handler" itemscope itemtype="http://schema.org/HttpActionHandler"><link itemprop="method" href="http://schema.org/HttpRequestMethod/GET"/><a href="https://www.google.com/calendar/event?action=RESPOND&eid=NzcyMmZsYWhydWwwZTN0YnBxMjdxaTRvOWwgY2x1YjJAbWFpbGJyb3kuaW5mb3JtYXRpay50dS1tdWVuY2hlbi5kZQ&rst=2&tok=NTIjc2U2ZWJlM3RvZmY0Y2g1bm11bmlibTVtOThAZ3JvdXAuY2FsZW5kYXIuZ29vZ2xlLmNvbWFjYmZlMjFhZWRjNjhhY2JjMTNlNmYwNzg3NzVjNWY3NjA2NThhYzY&ctz=Europe%2FBerlin&hl=en&es=0" style="color:#20c;white-space:nowrap" itemprop="url">No</a></span></span></strong> <wbr><a href="https://www.google.com/calendar/event?action=VIEW&eid=NzcyMmZsYWhydWwwZTN0YnBxMjdxaTRvOWwgY2x1YjJAbWFpbGJyb3kuaW5mb3JtYXRpay50dS1tdWVuY2hlbi5kZQ&tok=NTIjc2U2ZWJlM3RvZmY0Y2g1bm11bmlibTVtOThAZ3JvdXAuY2FsZW5kYXIuZ29vZ2xlLmNvbWFjYmZlMjFhZWRjNjhhY2JjMTNlNmYwNzg3NzVjNWY3NjA2NThhYzY&ctz=Europe%2FBerlin&hl=en&es=0" style="color:#20c;white-space:nowrap" itemprop="url">more options »</a></p></td></tr><tr><td style="background-color:#f6f6f6;color:#888;border-top:1px Solid #ccc;font-family:Arial,Sans-serif;font-size:11px"><p>Invitation from <a href="https://www.google.com/calendar/" target="_blank" style="">Google Calendar</a></p><p>You are receiving this courtesy email at the account club2@mailbroy.informatik.tu-muenchen.de because you are an attendee of this event.</p><p>To stop receiving future updates for this event, decline this event. Alternatively you can sign up for a Google account at https://www.google.com/calendar/ and control your notification settings for your entire calendar.</p><p>Forwarding this invitation could allow any recipient to send a response to the organizer and be added to the guest list, or invite others regardless of their own invitation status, or to modify your RSVP. <a href="https://support.google.com/calendar/answer/37135#forwarding">Learn More</a>.</p></td></tr></table></div></span></span>