The structure of ${\lim }^1$-groups

Ioannis Emmanouil

If $(A_n{)}_n$ is a decreasing filtration of a module $A$ and $\hat{A}={\lim }_{n}A/A_n$, then ${\lim }_n^1{A}_n$ is identified with the cokernel of the canonical map $A \longrightarro…