#### 25 Citations

CAHIERS DE TOPOLOGIE ET GÉOMÉTRIE DIFFÉRENTIELLE CATÉGORIQUES

- 2008

© Andrée C. Ehresmann et les auteurs, 1996, tous droits réservés. L’accès aux archives de la revue « Cahiers de topologie et géométrie différentielle catégoriques » implique l’accord avec les… Expand

On structures of geometrically realizable triangulations on surfaces

- Mathematics
- 2012

Acknowledgments I (the author) would like to thank Professor Atsuhiro Nakamoto for his suggestions, careful reading and so on. Without his help, I cannot complete this thesis. Also, I would like to… Expand

Reflect ions on hyperbol ic space

- 2021

In school, we learn that the interior angles of any triangle sum up to π. However, there exist spaces different from the usual Euclidean space in which this is not true. One of these spaces is the… Expand

Remarks and problems about algorithmic descriptions of groups

- Mathematics
- 2021

We make the case that the so called “global decision problems” should not be investigated solely for groups described by finite presentations. We propose to use descriptions that be algorithms that… Expand

The word problem for one-relation monoids: a survey

- Mathematics
- Semigroup Forum
- 2021

This survey is intended to provide an overview of one of the oldest and most celebrated open problems in combinatorial algebra: the word problem for one-relation monoids. We provide a history of the… Expand

The B B Newman spelling theorem

- Mathematics
- 2020

This article aims to be a self-contained account of the history of the B B Newman Spelling Theorem, including the historical context in which it arose. First, an account of B B Newman and how he came… Expand

“Are the genre and the Geschlecht one and the same number?” An inquiry into Alfred Clebsch's Geschlecht

- Philosophy
- 2020

Abstract This article is aimed at throwing new light on the history of the notion of genus, whose paternity is usually attributed to Bernhard Riemann while its original name Geschlecht is often… Expand

Semigroup congruences : computational techniques and theoretical applications

- Mathematics
- 2019

Computational semigroup theory is an area of research that is subject to growing interest. The development of semigroup algorithms allows for new theoretical results to be discovered, which in turn… Expand

Balanced and almost balanced group presentations from algorithmic viewpoint

- Mathematics
- 2018

In this thesis we study algorithmic aspects of balanced group presentations which are finite presentations with the same number of generators and relations. The main motivation is that the… Expand

On the semigroup rank of a group

- Mathematics
- Semigroup Forum
- 2018

For an arbitrary group G, it is known that either the semigroup rank $$G{\text {rk}_\text {s}}$$Grks equals the group rank $$G{\text {rk}_\text {g}}$$Grkg, or $$G{\text {rk}_\text {s}}= G{\text… Expand