No-regret generative modeling via parabolic Monge–Ampère PDE
基于抛物型Monge–Ampère偏微分方程的无遗憾生成建模AI 解读 ↓
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基于抛物型Monge–Ampère偏微分方程的无遗憾生成建模AI 解读 ↓
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We introduce a novel generative modeling framework based on a discretized parabolic Monge–Ampère PDE, which emerges as a continuous limit of the Sinkhorn algorithm commonly used in optimal transport. Our method performs iterative refinement in the space of Brenier maps using a mirror gradient descent step. We establish theoretical guarantees for generative modeling through the lens of no-regret analysis, demonstrating that the iterates converge to the optimal Brenier map under a variety of step-size schedules. As a technical contribution, we derive a new Evolution Variational Inequality tailored to the parabolic Monge–Ampère PDE, connecting geometry, transportation cost and regret. Our framework accommodates nonlog-concave target distributions, constructs an optimal sampling process via the Brenier map, and integrates favorable learning techniques from generative adversarial networks and score-based diffusion models. As direct applications, we illustrate how our theory paves new pathways for generative modeling and variational inference.