Fixes a typo and adds a todo
This commit is contained in:
parent
b7f48322c5
commit
bd4aba53b7
2 changed files with 3 additions and 1 deletions
|
@ -78,7 +78,7 @@ The following two theorems can be found in textbooks about homological algebra s
|
|||
The latter two theorems have a direct consequence for rational homotopy theory. By taking $A = \Q$ we see that the torsion groups vanish. We have the immediate corollary.
|
||||
|
||||
\Corollary{rational-corollaries}{
|
||||
We have the following natural isomorphisms in rational homology, and we can relate rational cohomolgy naturally to rational homology
|
||||
We have the following natural isomorphisms in rational homology, and we can relate rational cohomology naturally to rational homology
|
||||
\begin{align*}
|
||||
H_\ast(X) \tensor \Q &\tot{\iso} H_\ast(X; \Q), \\
|
||||
H_\ast(X; \Q) \tensor H_\ast(Y; \Q) &\tot{\iso} H_\ast(X \times Y; \Q), \\
|
||||
|
|
|
@ -36,3 +36,5 @@ Consider the augmented cdga $V(n) = S(n) \oplus \k$, with trivial multiplication
|
|||
}
|
||||
|
||||
From now on the dual of a vector space will be denoted as $V^\ast = \Hom_\k(V, \k)$. So the above lemma states that there is a bijection $[A, V(n)] \iso \pi^n(A)^\ast$.
|
||||
|
||||
\todo{long exact sequence}
|
||||
|
|
Reference in a new issue