𝔖 Bobbio Scriptorium
✦   LIBER   ✦

‘Drawing Out’ - a Humanist Approach to Drawing

✍ Scribed by Rab Walker


Book ID
108567538
Publisher
John Wiley and Sons
Year
2002
Tongue
English
Weight
188 KB
Volume
21
Category
Article
ISSN
1476-8062

No coin nor oath required. For personal study only.


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How to draw a group?
✍ Alexander Zvonkin 📂 Article 📅 1998 🏛 Elsevier Science 🌐 English ⚖ 512 KB

A map is at the same time a group. To represent a map (that is, a graph drawn on the sphere or on another surface) we usually use a pair of permutations on the set of the 'ends' of edges. These permutations generate a group which we call a cartographic group. The main motivation for the study of the