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In order to generate high quality explanations in mathematical domains, the presentation must be adapted to the knowledge of the intended audience. Most proof presentation systems only communicate proofs on a fixed degree of abstraction independently of the addressee's knowledge. In this paper , we shall present the proof explanation system P.rex. Based on… (More)

- Dimitra Tsovaltzi, Armin Fiedler
- 2003

Despite empirical evidence that natural language dialog capabilities are necessary for the success of tutorial sessions, only few state-of-the-art tutoring systems use natural-language style interaction. Since domain knowledge, tutoring and pedagogical knowledge, and dialog management are tightly intertwined , the modeling and integration of proper natural… (More)

- Christoph Benzm, Lassaad Cheikhrouhou, Detlef Fehrer, Armin Fiedler, Xiaorong Huang, Manfred Kerber +7 others
- 1997

mega is a mixed-initiative system with the ultimate purpose of supporting theorem proving in mainstream mathematics and mathematics education. The current system consists of a proof planner and an integrated collection of tools for formulating problems, proving subproblems, and proof presentation.

This paper describes the linguistic part of a system called PROVERB, which transforms, abstracts, and verbalizes machine-found proofs into formated texts. Linguistically, the architecture of PROVERB follows most application oriented systems, and is a pipe-lined control of three components. Its macroplanner linearizes a proof and plans mediating… (More)

- Christoph Benzm¨uller, Armin Fiedler, Malte Gabsdil, Helmut Horacek, Ivana Kruijff-Korbayov´a, Manfred Pinkal +4 others
- 2003

In this paper we report on a Wizard-of-Oz (WOz) experiment which was conducted in order to collect written empirical data on mathematics tuto-rial dialogues in German. We present a methodological approach for opti-mising the gains from WOz empirical studies. We show the results of this approach from our empirical study.

- Christoph Benzmüller, Armin Fiedler, Malte Gabsdil, Helmut Horacek, Ivana Kruijff-Korbayová, Manfred Pinkal +4 others
- 2003

The representation of knowledge for a mathematical proof assistant is generally used exclusively for the purpose of proving theorems. Aiming at a broader scope, we examine the use of mathematical knowledge in a mathematical tutoring system with flexible natural language dialog. Based on an analysis of a corpus of dialogs we collected with a simulated… (More)

- Jörg Siekmann, Christoph Benzmüller, Vladimir Brezhnev, Lassaad Cheikhrouhou, Armin Fiedler, Andreas Franke +11 others
- 2002

The Ωmega proof development system [2] is the core of several related and well integrated research projects of the Ωmega research group. Ωmega is a mathematical assistant tool that supports proof development in mathematical domains at a user-friendly level of abstraction. It is a modular system with a central data structure and several complementary… (More)