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Matthew Bielskas

Publications and source records attributed to Matthew Bielskas.

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Reinforcement Learning For Data Poisoning on Graph Neural Networks

Adversarial Machine Learning has emerged as a substantial subfield of Computer Science due to a lack of robustness in the models we train along with crowdsourcing practices that enable attackers to tamper with data. In the last two years, interest has surged in adversarial attacks on graphs yet the Graph Classification setting remains nearly untouched. Since a Graph Classification dataset consists of discrete graphs with class labels, related work has forgone direct gradient optimization in favor of an indirect Reinforcement Learning approach. We will study the novel problem of Data Poisoning (training time) attack on Neural Networks for Graph Classification using Reinforcement Learning Agents.

cs.LG

Formal Methods for An Iterated Volunteer's Dilemma

Game theory provides a framework for studying communication dynamics and emergent phenomena arising from rational agent interactions. We present a model framework for the Volunteer's Dilemma with four key contributions: (1) formulating it as a stochastic concurrent nn n-player game, (2) developing properties to verify model correctness and reachability, (3) constructing strategy synthesis graphs to identify optimal game trajectories, and (4) analyzing parameter correlations with expected local and global rewards over finite time horizons.

cs.MA