In this paper the author establishes some foundations regarding sheaves of vector spaces on graphs and their invariants, such as homology groups and their limits. He then uses these ideas to prove the Hanna Neumann Conjecture of the 1950s; in fact, he proves a strengthened form of the conjecture.
| ISBN: | 9781470409883 |
| Publication date: | 30th January 2015 |
| Author: | Joel Friedman |
| Publisher: | American Mathematical Society |
| Format: | Paperback |
| Pagination: | 106 pages |
| Series: | Memoirs of the American Mathematical Society |
| Genres: |
Discrete mathematics Topology Combinatorics and graph theory |