# Local Polynomial Lp-norm Regression

arXiv: https://arxiv.org/abs/2504.18695 · HTML: https://mlsanity.com/paper/2504.18695/

## Key facts

- No citing papers in the map yet (data through 14 Oct 2026).
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- First posted on arXiv 25 Apr 2025.

## Abstract (arXiv)

The local least squares estimator for a regression curve cannot provide optimal results when non-Gaussian noise is present. Both theoretical and empirical evidence suggests that residuals often exhibit distributional properties different from those of a normal distribution, making it worthwhile to consider estimation based on other norms. It is suggested that Lp-norm estimators be used to minimize the residuals when these exhibit non-normal kurtosis. In this paper, we propose a local polynomial Lp-norm regression that replaces weighted least squares estimation with weighted Lp-norm estimation for fitting the polynomial locally. We also introduce a new method for estimating the parameter p from the residuals, enhancing the adaptability of the approach. Through numerical and theoretical investigation, we demonstrate our method's superiority over local least squares in one-dimensional data and show promising outcomes for higher dimensions, specifically in 2D.