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Functional Flow Matching

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arxiv 2305.17209 v2 pith:FXJP53QU submitted 2023-05-26 cs.LG stat.ML

classification cs.LGstat.ML
keywords flowmatchingfunction-spacefunctionalgenerativemeasuresmethodmodel
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We propose Functional Flow Matching (FFM), a function-space generative model that generalizes the recently-introduced Flow Matching model to operate in infinite-dimensional spaces. Our approach works by first defining a path of probability measures that interpolates between a fixed Gaussian measure and the data distribution, followed by learning a vector field on the underlying space of functions that generates this path of measures. Our method does not rely on likelihoods or simulations, making it well-suited to the function space setting. We provide both a theoretical framework for building such models and an empirical evaluation of our techniques. We demonstrate through experiments on several real-world benchmarks that our proposed FFM method outperforms several recently proposed function-space generative models.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Learning sufficient low-dimensional structures through conditional optimal transport

    math.ST 2026-07 conditional novelty 7.0 of 10

    Sufficiency forces the conditional optimal-transport map and its velocity to factor through the reduced covariate, and the resulting flow-matching estimator (SDR-COT) recovers the central subspace in the linear case.

  2. Scale-Adaptive Generative Flows for Multiscale Scientific Data

    stat.ML 2025-09 conditional novelty 6.0 of 10

    For generative flows on multiscale scientific fields, the noise spectrum should be at least as rough as the data's, and a scale-adaptive schedule can tame the terminal-time stiffness of rougher noise.

  3. Physics-Informed Distillation of Diffusion Models for PDE-Constrained Generation

    cs.LG 2025-05 conditional novelty 6.0 of 10

    Post-hoc distillation with a PDE-residual loss on final samples avoids the Jensen gap and yields one-step physics-constrained generation.

  4. NeuTSFlow: Modeling Continuous Functions Behind Time Series Forecasting

    cs.LG 2025-07 reject novelty 5.0 of 10

    A flow-matching model with a neural-operator velocity field is proposed to forecast time series by transporting distributions over continuous functions, reporting top average rank on eight benchmarks.

  5. Bridging the Last Mile of Prediction: Enhancing Time Series Forecasting with Conditional Guided Flow Matching

    cs.LG 2025-07 conditional novelty 5.0 of 10

    CGFM uses an auxiliary model's predictions as the source for flow matching to learn forecast residuals and improve time series forecasts.

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