Putting heterosynaptic plasticity in its place - as easy as PIE

Putting Plasticity in Its Place

activity corresponding to a series of shuttle runs across a square arena, heteroassociative connections between activated place cells become potentiated, cells with overlapping place fields develop strong bidirectional connections and asymmetric connections between cells against the direction of motion become depressed. The elevated connectivity of the activated ensemble resembles the broad dev...

Dependent Types: Easy as PIE

Dependent type systems allow for a rich set of program properties to be expressed and mechanically verified via type checking. However, despite their significant expressive power, dependent types have not yet advanced into mainstream programming languages. We believe the reason behind this omission is the large design space for dependently typed functional programming languages, and the consequ...

Dependent Types: Easy as PIE Work-In-Progress Project Description

Dependent type systems allow for a rich set of program properties to be expressed and mechanically verified via type checking. However, despite their significant expressive power, dependent types have not yet advanced into mainstream programming languages. We believe the reason behind this omission is the large design space for dependently typed functional programming languages, and the consequ...

Putting Hierarchy in Its Place

Putting Opacity in its Place

We clarify the relationships between Guerraoui and Kapalka’s opacity correctness condition for Transactional Memory (TM) algorithms and the TMS1 and TMS2 conditions we have previously proposed. Using formal, machine checked simulation proofs constructed using the PVS theorem proving system, we have shown that all algorithms that satisfy opacity also satisfy TMS1, and that all algorithms that sa...