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Themis Palpanas

4 accepted papers

2026

CauKer: Classification Time Series Foundation Models Can Be Pretrained on Synthetic Data

ICLR 2026oral

Time series foundation models (TSFMs) have recently gained significant attention due to their strong zero-shot capabilities and widespread real-world applications. Such models typically require a computationally costly pretraining on large-scale, carefully curated collections of real-world sequences…

Cited by 0SourcecodeScholar
2026

ParisKV: Fast and Drift-Robust KV-Cache Retrieval for Long-Context LLMs

ICML 2026poster

KV-cache retrieval is essential for long-context LLM inference, yet existing methods struggle with distribution drift and high latency at scale. We introduce **ParisKV**, a drift-robust, GPU-native KV-cache retrieval framework based on collision-based candidate selection, followed by a quantized inn…

Cited by 0SourceScholar
2024

Analysing Multi-Task Regression via Random Matrix Theory with Application to Time Series Forecasting

NeurIPS 2024spotlight

In this paper, we introduce a novel theoretical framework for multi-task regression, applying random matrix theory to provide precise performance estimations, under high-dimensional, non-Gaussian data distributions. We formulate a multi-task optimization problem as a regularization technique to enab…

Cited by 2SourcePDFScholar
2024

SAMformer: Unlocking the Potential of Transformers in Time Series Forecasting with Sharpness-Aware Minimization and Channel-Wise Attention

ICML 2024oral

Transformer-based architectures achieved breakthrough performance in natural language processing and computer vision, yet they remain inferior to simpler linear baselines in multivariate long-term forecasting. To better understand this phenomenon, we start by studying a toy linear forecasting proble…