M(9,1,2)

M(9,1,2) - $kD_{18}$
Representative: $kD_{18}$ $C_9$ $C_2$ 6 2 1 $\left( \begin{array}{cc} 5 & 4 \\ 4 & 5 \\ \end{array} \right)$ Yes Yes Yes $\mathcal{O} D_{18}$ $\left( \begin{array}{cc} 1 & 0 \\ 0 & 1 \\ 1 & 1 \\ 1 & 1 \\ 1 & 1 \\ 1 & 1 \\ \end{array}\right)$ 1 {{{PIgroup}}} Yes $kD_{18}$ Yes M(9,1,3) Yes {{{coveringblocks}}} {{{coveredblocks}}} {{{pcoveringblocks}}}

Basic algebra

Quiver: a:<1,2>, b:<2,1>

Relations w.r.t. $k$: a(ba)^4=b(ab)^4=0

Projective indecomposable modules

Labelling the simple $B$-modules by $S_1, S_2$, the projective indecomposable modules have Loewy structure as follows:

$\begin{array}{cc} \begin{array}{c} S_1 \\ S_2 \\ S_1 \\ S_2 \\ S_1 \\ S_2 \\ S_1 \\ S_2 \\ S_1 \\ \end{array}, & \begin{array}{c} S_2 \\ S_1 \\ S_2 \\ S_1 \\ S_2 \\ S_1 \\ S_2 \\ S_1 \\ S_2 \\ \end{array} \end{array}$

Irreducible characters

All irreducible characters have height zero.