# Action-Sensitive Phonological Dependencies

## TL;DR

This paper introduces TSSL functions, a new class of functions that better model rhythmic syncope in phonology by focusing on computation history, offering a more precise characterization than previous models.

## Contribution

It defines the TSSL class of functions and demonstrates their suitability for modeling rhythmic syncope, surpassing existing frameworks like TIOSL.

## Key findings

- TSSL functions describe rhythmic syncope effectively.
- TSSL functions are more restrictive than TIOSL for this purpose.
- TSSL provides a better characterization within phonological theory.

## Abstract

This paper defines a subregular class of functions called the tier-based synchronized strictly local (TSSL) functions. These functions are similar to the the tier-based input-output strictly local (TIOSL) functions, except that the locality condition is enforced not on the input and output streams, but on the computation history of the minimal subsequential finite-state transducer. We show that TSSL functions naturally describe rhythmic syncope while TIOSL functions cannot, and we argue that TSSL functions provide a more restricted characterization of rhythmic syncope than existing treatments within Optimality Theory.