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Antonios Valkanas

5 accepted papers

2025

C3PO: Optimized Large Language Model Cascades with Probabilistic Cost Constraints for Reasoning

NeurIPS 2025poster

Large language models (LLMs) have achieved impressive results on complex reasoning tasks, but their high inference cost remains a major barrier to real-world deployment. A promising solution is to use cascaded inference, where small, cheap models handle easy queries, and only the hardest examples ar…

Cited by 0SourceScholar
2025

SKOLR: Structured Koopman Operator Linear RNN for Time-Series Forecasting

ICML 2025poster

Koopman operator theory provides a framework for nonlinear dynamical system analysis and time-series forecasting by mapping dynamics to a space of real-valued measurement functions, enabling a linear operator representation. Despite the advantage of linearity, the operator is generally infinite-dime…

2023

Structure Aware Incremental Learning with Personalized Imitation Weights for Recommender Systems

AAAI 2023technical

Recommender systems now consume large-scale data and play a significant role in improving user experience. Graph Neural Networks (GNNs) have emerged as one of the most effective recommender system models because they model the rich relational information. The ever-growing volume of data can make tra…

Cited by 10SourcePDFScholar
2022

Bag Graph: Multiple Instance Learning Using Bayesian Graph Neural Networks

AAAI 2022technical

Multiple Instance Learning (MIL) is a weakly supervised learning problem where the aim is to assign labels to sets or bags of instances, as opposed to traditional supervised learning where each instance is assumed to be independent and identically distributed (IID) and is to be labeled individually.…