We present in this paper an algorithm which is a natural extension in dimension n of the Euclidean algorithm computing the greatest common divisor of two integers. Let H be a sub-group of Z“, given… (More)

We describe a tool that combines a general purpose theorem prover and an off-theshelf interface for dynamic geometry drawing to enhance man-machine interaction involving geometrical proofs. With our… (More)

The weathering of rocks and minerals may involve physical, chemical or biological processes. In particular, as the work of Ehrlich1,2, Aristovska3, Webbley4 and their collaborators shows, biogenic… (More)

This paper presents an approach for the recognition of on-line handwritten mathematical expressions. The Hidden Markov Model (HMM) based system makes use of simultaneous segmentation and recognition… (More)

This paper describes current results of Ofr (Optical Formula Recognition), a system for extracting and understanding mathematical expressions in documents. Such a tool could be really useful to be… (More)

Abstract We describe how we connected three programs that compute Gr ̈ obne bases [1] to Coq [11], to do automated proofs on algebraic, geometrical and arithmet ical expressions. The result is a set… (More)