Appendix 3. Chronicles of Torus
Author: Bezhaev A.Yu.
The site
sql-ex.ru presents several tasks, connected with the mythical planet by the name Torus. This paragraph gives a brief introduction to planet topology and explains terminology.
In mathematical sense, torus is a surface of revolution generated by revolving a circle in three-dimensional space (see http://en.wikipedia.org/wiki/Torus). It has a bagel (boublik) form.
Torus
If you use Google Chrome. That:
1.Copy this chrome://plugins/ in your address bar
2.Press button “detals” and switch off Flash player 10.
We hope that flash-presentation will help realize more accurately the mutual displacement of countries TIJ and successfully solve the relevant exercises at sql-ex.ru. :-)
Keys (qwe, asd, ->, <-) are intended for rotation of the torus, whereas Up/Down keys make zooming. Click on country region within a torus to rewrite rectangular Mercadot map.