Free lattices proof theoretically
Tomasz Kowalski (La Trobe University)

February 23, 2018, 7:00am - 9:00am
Logic Group, The University of Melbourne

Old Arts
Parkville 3010


National Taiwan University

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Tomasz Kowalski (La Trobe) will present "Free lattices proof theoretically" at 12 on 23 February in Old Arts 156.

Abstract: An important early result on free lattices, proved by Jonsson
and Kiefer in 1962, states that free lattices are semidistributive,
that is, they satisfy the quasi-identity 

(SD-join) a V b = a V c --> a V (b ^ c)  

as well as its dual (SD-meet). I will present a proof-theoretic proof
of this result, employing a simple sequent calculus. 

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