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<main id="main" class="site__body has-sidebar sidebar-left"> <div class="site__main"> <div id="c15705" class="content content--textpic content--layout-0 has-header frame--default content--bg-none"><div class="content__ct"><div class="content__wrap"><header class="content__hd"><h1 class="content__ttl "> Parameterized and Counting Algorithms and Complexity </h1></header><div class="content__bd"><div class="ce-textpic ce-right ce-intext"><div class="ce-bodytext"><p>Parameterized complexity analyzes how different parameters of the input influence the complexity of hard algorithmic problems. The general goal is to show with fixed-parameter tractability results that the combinatorial explosion can be confined to certain well-defined parameters, or to understand why such algorithms are not possible.&nbsp;An interesting class of hard problems that we consider are counting problems (where the goal is to count all solutions), as they may allow for interesting phenomena that are not observed in the corresponding decision problems.</p></div></div></div></div></div></div> <div id="c15703" class="content content--header content--layout-0 has-header frame--default content--bg-none"><div class="content__ct"><div class="content__wrap"><header class="content__hd"><h2 class="content__ttl "> People </h2></header><div class="content__bd"></div></div></div></div> <div id="c23499" class="content content--list content--layout-0 has-header frame--default content--bg-none"><div class="content__ct"><div class="content__wrap"><header class="content__hd"><h3 class="content__ttl "> Coordinator 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Max-Planck-Institut für Informatik <br><span itemprop="streetAddress"> Saarland Informatics Campus <br> Campus E1 4 – Room 322 </span><br><span itemprop="postalCode">66123</span>&nbsp;<span itemprop="addressLocality">Saarbrücken</span></address><meta itemprop="url" content="https://people.mpi-inf.mpg.de/~fjacob"/><a class="link-more address-card__more-lnk" href="https://people.mpi-inf.mpg.de/~fjacob">more</a></div><div class="address-card__contact-ct"><h4 class="address-card__sec-ttl">Contact</h4><ul class="address-card__contact-list"><li><a class="link-mail" href="https://domino.mpi-inf.mpg.de/intranet/mpii/people.nsf/email!ReadForm&UID=23773&Name=Focke%2c%20Jacob" >Get email via email</a></li><li><a href="tel:+4968193251133" class="link-phone" itemprop="telephone">+49 681 9325 1133</a></li><li><a href="fax:+4968193251099" class="link-fax" itemprop="faxNumber">+49 681 9325 1099</a></li></ul></div><div class="address-card__department-ct"><h4 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