TITLE: Global dimension of quiver algebra
QUESTION [6 upvotes]: Given a representation-finite (finite dimensional over a field) quiver algebra of finite global dimension. Is $eAe$ isomorphic to the field for at least one primitive idempotent $e$?
This is true for Nakayama algebras (and trivially for acyclic algebras).

REPLY [4 votes]: Edit: When writing this, I missed the condition that the algebra should be representation-finite.  The algebra below is not.
Not necessarily.  Consider the path algebra of the quiver with two vertices and three arrows
$$
1 \substack{\xrightarrow{a} \\ \xleftarrow[b,c]{\xleftarrow{}} } 2
$$
modulo the relations $ab=0$ and $ca=0$ (composing arrows from left to right). This algebra $A$ has dimension $8$ over the base field, and its global dimension $3$, since the projective resolutions of the simple modules have the form
$$
0\to P_1\to P_2\to P_1\to S_1 \to 0
$$
and
$$
0\to P_1 \to P_2 \to P_1\oplus P_1 \to P_2 \to S_2 \to 0,
$$
where $P_i$ is the projective cover of the simple module $S_i$.
However, we see that $e_1Ae_1 \cong k[x]/(x^2) \cong e_2Ae_2$.