# Mittagsseminar (in cooperation with A. Steger, D. Steurer and B. Sudakov)

__Mittagsseminar Talk Information__ | |

**Date and Time**: Thursday, December 22, 2005, 12:15 pm

**Duration**: This information is not available in the database

**Location**: This information is not available in the database

**Speaker**: Florian Walpen

## Boosted Sampling: Approximation Algorithms for Stochastic Optimization

Several combinatorial optimization problems choose elements to minimize
the total cost of constructing a feasible solution that satisfies
requirements of clients. In the Steiner Tree problem, for example, edges
must be chosen to connect terminals (clients). The authors consider a
stochastic version of such a problem where the solution is constructed
in two stages: Before the actual requirements materialize, we can choose
elements in a first stage. The actual requirements are then revealed,
drawn from a pre-specified probability distribution F thereupon, some
more elements may be chosen to obtain a feasible solution for the actual
requirements. However, in this second (recourse) stage, choosing an
element is costlier by a factor of s > 1. The goal is to minimize the
first stage cost plus the expected second stage cost.

Upcoming talks | All previous talks | Talks by speaker | Upcoming talks in iCal format (beta version!)

Previous talks by year: 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996

Information for students and suggested topics for student talks

Automatic MiSe System Software Version 1.4803M | admin login