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			     S E M I N A I R E
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			  I N R I A - Rocquencourt
                         Amphi Turing du bâtiment 1

                          Lundi 21 septembre, 10h30

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                                Kenji Maillard
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                          Université Paris Diderot

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             An equational presentation of the local state monad
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In order to account for effects in lambda calculus, monads were
introduced by Moggi along with the computational lambda-calculus.
Plotkin then introduced algebraic effects as a special class of monads
having a presentation as an equational theory in order to reflect more
syntactically the operations from programming languages.

In the same strand of research, he also introduced with Power a monad
accounting for memory accesses as well as dynamic allocation called
the local state monad. A presentation of this monad in term of
operations was given later by Staton in the setting of
nominal-enriched theories and Melliès in the setting of theories with
arity.

In the course of my master studies, I have been working under the
supervision of Paul-André Melliès on the local state monad. I will
present how this monad can be presented by operations and how it can
be seen as some kind of monad transformer over the global state monad,
dynamically allocating and deallocating effects as needed.