Title: Representation type of blocks of cyclotomic Hecke algebras of type $G(r, 1, n)$

Abstract: Let $K$ be an algebraically closed field with $Char K\neq 2$ and $(s_1, s_2, \cdots, s_r)\in \mathbb{Z}^r$ a multicharge with $r>2$. Let $\mathcal {H}_n(q, Q)$ be a cyclotomic Hecke algebra of type $G(r, 1, n)$, where $q\neq 0, 1$ and $Q=(q^{s_1}, q^{s_2}, \cdots, q^{s_r})$. For each block $B$ of $\mathcal {H}_n(q, Q)$, we introduce a new invariant, called block move vector, which can be considered as a generalization of the weight $w(B)$. We prove by using block move vector that block $B$ has finite representation type if and only if $w(B)<2$, or $B$ is Morita equivalent to $K[x]/x^{w(B)+1}$. Blocks of finite representation type with weight more than one are determined completely by block move vectors. This result implies that some blocks of finite type are Brauer tree algebras whose Brauer trees have exceptional vertex. We also determine representation type for all the blocks of cyclotomic $q$-Schur algebras. Moreover, by using our result, we construct examples of blocks with the same weight that are not derived equivalent. Examples of derived equivalent blocks being in different orbits under the adjoint action of the affine Weyl group are also given.