An illustrative explanation of manifolds

Today I was reading about manifolds and I found this illustrative image about them. “[…] To find global information, the being would have the walk around both surfaces and be very careful to check angles and distances. If the being were nearsighted and could not check distances and angles, then its examination of the local vicinity, or […]

Mathematics book suggestions

A group of colleagues from the Faculty of Mathematics of the University of Costa Rica, are collecting suggestions for modern books in mathematics to buy some for their lectures and research. The list is in http://bit.ly/Ojk2Ou and we will appreciate any recommendation that you could give us in the comments. Thank you.