Search Results for author: Siran Li

Found 3 papers, 2 papers with code

PCF-GAN: generating sequential data via the characteristic function of measures on the path space

1 code implementation NeurIPS 2023 Hang Lou, Siran Li, Hao Ni

Generating high-fidelity time series data using generative adversarial networks (GANs) remains a challenging task, as it is difficult to capture the temporal dependence of joint probability distributions induced by time-series data.

Time Series Time Series Generation

Gaussian kernels on non-simply-connected closed Riemannian manifolds are never positive definite

no code implementations12 Mar 2023 Siran Li

We show that the Gaussian kernel $\exp\left\{-\lambda d_g^2(\bullet, \bullet)\right\}$ on any non-simply-connected closed Riemannian manifold $(\mathcal{M}, g)$, where $d_g$ is the geodesic distance, is not positive definite for any $\lambda > 0$, combining analyses in the recent preprint~[9] by Da Costa--Mostajeran--Ortega and classical comparison theorems in Riemannian geometry.

Path Development Network with Finite-dimensional Lie Group Representation

1 code implementation2 Apr 2022 Hang Lou, Siran Li, Hao Ni

To tackle this problem, we propose a novel, trainable path development layer, which exploits representations of sequential data with the help of finite-dimensional matrix Lie groups.

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