Main menu:

Categories

Site search

 

March 2008
M T W T F S S
« Feb   Jul »
 12
3456789
10111213141516
17181920212223
24252627282930
31  

Archives

Meta

Possible homology of closed manifolds.

In this fun paper,

Kreck, Matthias An inverse to the Poincaré conjecture.Festschrift: Erich Lamprecht. Arch. Math. (Basel) 77 (2001), no. 1, 98—106.

it is pointed out that

  • homology is a very basic invariant, and
  • closed manifolds are very basic objects

and so a very basic question is: what sequences of abelian groups are the homology groups of a closed simply connected manifold?

It isn’t very hard to realize any sequence of abelian groups up to the middle dimension, but that middle dimension is tricky (e.g., classify (n-1)-connected 2n-manifolds).

Anyway, I was wondering: is this realization question solvable for homology with coefficients in \Z/2\Z or \Q?

Comments

Comment from chris tolles
Time: April 5, 2008, 9:04 am

don’t mean to go off topic, but is there any chance you’ll update forgetmenot for leopard or safari 3.1?

you’ve got a devoted following… i need my undo close tab back!

Write a comment