15:30 Fachbereichskolloquium des Instituts / Staff colloquium of the institute
    (offiziell nicht Teil der Tagung / not officially part of the conference)
    W. Scharlau (Münster): The Life of Alexander Grothendieck
18:30 Vorabendtreffen / Meeting night
    café Stairway to Heaven

9:15 Eröffnung und Einführung / Opening and Introduction

9:45 Prof. Dr. H.J.M. Bos
    Comments on reconstruction based on an example: Stevin's attempt to clarify the notion of equation by an analogy to the 'rule of three'

10.45 Kaffee/ coffee

11:00 Diskussion über das Tagungsthema Rekonstruktionen / Discussion on the conference's theme: Reconstructions

11:45 Ilana Wartenberg
    Epistle of the Number: an Episode of Algebra in Hebrew (Sicily, 14th Century)

12:30 Mittagessen / Lunch

Ausflug / excursion

15:15 Gabriele Wickel
    Feldvermessung in England im 17.Jh.

16:00 Tina Su Lyn Lim
    The Zhangjiashan Calendar

16:45 kurze Pause / short break

17:00 Wijnand Rekers
    Mathematics in Delft

17:45 Henrik Kragh Sørensen
    Professionalization of mathematics in Scandinavia

09:15 Harald Gropp
    The reconstruction of a number and its history: some aspects of pi

10:00 Martina Schneider
    Pragmatism prevails over 'nostrification': van der Waerden's work on spinors

10:45 Coffee / Kaffee

11:00 Maarten Bullynck
    Lemmata

11:45 Frédéric Brechenmacher
     A history of the Jordan normal form for matrices

12:30 Mittagessen / Lunch

Ausflug / excursion

17:00 Birgit Petri
     Kurt hensel and the creation of p-adic numbers

17:45 Sébastien Maronne
    Descartes and the Problema astronomicum

9:30 Silvia Harmsen
    Muqarnas, Construction and Reconstruction

10:15 Steven Wepster
    Tobias Mayer's use of conflicting data

11:00 Kaffee / coffee

11:15 Diskussion im Plenum / Forum discussion

12:00 Ende / Closing