A theoretical analysis of the test error of finite-rank kernel ridge regression
Existing statistical learning guarantees for general kernel regressors often yield loose
bounds when used with finite-rank kernels. Yet, finite-rank kernels naturally appear in a …
bounds when used with finite-rank kernels. Yet, finite-rank kernels naturally appear in a …
Universality of Linear Recurrences Followed by Non-linear Projections: Finite-Width Guarantees and Benefits of Complex Eigenvalues
Deep neural networks based on linear RNNs interleaved with position-wise MLPs are
gaining traction as competitive approaches for sequence modeling. Examples of such …
gaining traction as competitive approaches for sequence modeling. Examples of such …
Rough Transformers: Lightweight Continuous-Time Sequence Modelling with Path Signatures
Time-series data in real-world settings typically exhibit long-range dependencies and are
observed at non-uniform intervals. In these settings, traditional sequence-based recurrent …
observed at non-uniform intervals. In these settings, traditional sequence-based recurrent …
Forecasting mortality rates with functional signatures
This study introduces an innovative methodology for mortality forecasting, which integrates
signature-based methods within the functional data framework of the Hyndman–Ullah (HU) …
signature-based methods within the functional data framework of the Hyndman–Ullah (HU) …
Variance Norms for Kernelized Anomaly Detection
We present a unified theory for Mahalanobis-type anomaly detection on Banach spaces,
using ideas from Cameron-Martin theory applied to non-Gaussian measures. This approach …
using ideas from Cameron-Martin theory applied to non-Gaussian measures. This approach …
Universal randomised signatures for generative time series modelling
F Biagini, L Gonon, N Walter - arxiv preprint arxiv:2406.10214, 2024 - arxiv.org
Randomised signature has been proposed as a flexible and easily implementable
alternative to the well-established path signature. In this article, we employ randomised …
alternative to the well-established path signature. In this article, we employ randomised …
Joint calibration to SPX and VIX options with signature‐based models
We consider a stochastic volatility model where the dynamics of the volatility are described
by a linear function of the (time extended) signature of a primary process which is supposed …
by a linear function of the (time extended) signature of a primary process which is supposed …
Risk sharing with deep neural networks
We consider the problem of optimally sharing a financial position among agents with
potentially different reference risk measures. The problem is equivalent to computing the …
potentially different reference risk measures. The problem is equivalent to computing the …
Signature Reconstruction from Randomized Signatures
Controlled ordinary differential equations driven by continuous bounded variation curves
can be considered a continuous time analogue of recurrent neural networks for the …
can be considered a continuous time analogue of recurrent neural networks for the …
Data-driven control of input-affine systems: the role of the signature transform
One of the most challenging tasks in control theory is arguably the design of a regulator for
nonlinear systems when the dynamics are unknown. To tackle it, a popular strategy relies on …
nonlinear systems when the dynamics are unknown. To tackle it, a popular strategy relies on …