[Apologies for multiple copies]

Dear all,

Let me advertise our next ERATO MMSD project colloquium talk by Takeo Uramoto on 22 February, 16:30-. Please find the title and the abstract below. You are all invited.

Sincerely, -- Natsuki Urabe [email protected] The University of Tokyo, ERATO MMSD

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Thu 22 February 2018, 16:30–18:00

ERATO MMSD Takebashi Site Common Room 3 http://group-mmm.org/eratommsd/access.html

Takeo Uramoto (Tohoku University), Recent developments in algebraic language theory

The purpose of this talk is to introduce a recent (2008~) active research trend in algebraic language theory. This field, among other approaches to formal languages, is characterized by its methodology: one reduces combinatorial / logical problems on formal languages (say, regular languages) into some tractable problems on algebraic structures (resp., finite semigroups). Recent works in the last decade shed new lights on this field (or its methodology) from the viewpoint of Stone-type duality theorem; and most importantly, indicated several new research directions extending classical frameworks. In this talk, based on our own works, we introduce this research trend (and its background motivation) and then carefully discuss its possible future directions.