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arXiv research

A locally-built, LLM-digested index of recent arXiv papers in quant finance, geometry/topology, and statistical ML — keyword search served straight from SQLite on this machine.

169,051 papers · 148 categories

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1122 · Jan 201619922001200920172026
10 results for PPAs

This paper presents a new framework for manifold learning based on a sequence of principal polynomials that capture the possibly nonlinear nature of the data. The proposed Principal Polynomial Analysis (PPA) generalizes PCA by modeling the directions of maximal variance by means of curves, instead of straight lines. Co…

2016-01-31abs ↗pdf ↗

Paper develops framework for valuing and assessing credit risk in renewable PPAs.

problem Renewable PPAs expose both parties to counterparty credit risk.
method Modelled joint dynamics of electricity prices and renewable output, incorporated default probabilities.
result Provides transparent metric for PPA valuation under counterparty risk.

Develops a semi-static strategy for hedging renewable PPAs, separating price and volume risks.

problem Risk exposure in pay-as-produced power purchase agreements (PPAs) due to joint power prices and renewable production.
method Uses a semi-static hedging strategy combining liquid futures for price risk and fixed renewable-linked claims for volume and covariance risk.
result Pricing and hedging of PPAs can be decomposed into a baseload forward level, a deterministic production-profile correction, and a stochastic price-volume covariance correction.

This paper introduces a new unsupervised method for dimensionality reduction via regression (DRR). The algorithm belongs to the family of invertible transforms that generalize Principal Component Analysis (PCA) by using curvilinear instead of linear features. DRR identifies the nonlinear features through multivariate r…

2016-01-31abs ↗pdf ↗

New model clusters graphs using Gromov-Wasserstein discrepancy.

problem Graph clustering with topological structures and node attributes.
method Gromov-Wasserstein discrepancy for relational graph comparison; learns atoms and weights via minimization of discrepancy.
result Model achieves flexible factorization of unaligned graphs with different sizes.

This work includes all the technical details of the Sequential Principal Curves Analysis (SPCA) in a single document. SPCA is an unsupervised nonlinear and invertible feature extraction technique. The identified curvilinear features can be interpreted as a set of nonlinear sensors: the response of each sensor is the pr…

2016-06-02abs ↗pdf ↗