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Transformation monoid minimisation

For every n∈Nn \in \mathbb{N}, the full transformation monoid TnT_n is the set of (total) functions from {1,2,…,n}\{1,2,\ldots,n\} to {1,2,…,n}\{1,2,\ldots,n\}, equipped with the standard function composition. The symmetric group SnS_n is the subroup of TnT_n composed of all the permutations. What is the complexity of the following decision problems with respect to the parameter nn: Problem 1: Given a submonoid ⟨s1,s2⟩⊆Tn\langle s_1,s_2\rangle \subseteq T_n generated by two elements, does there exist an integer mm smaller than nn such that ⟨s1,s2⟩\langle s_1,s_2\rangle can be embedded in TmT_m? Problem 2: Given a subgroup ⟨g1,g2⟩⊆Sn\langle g_1,g_2\rangle \subseteq S_n generated by two elements, does there exist an integer mm smaller than nn such that ⟨g1,g2⟩\langle g_1,g_2\rangle can be embedded in SmS_m?

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Boyuan Wang portraitBoyuan Wang
Minghan Wang portraitMinghan Wang
Bochao Li portraitBochao Li
Hongwei Hu portraitHongwei Hu