Search Results for author: Gudmund Pammer

Found 9 papers, 1 papers with code

Estimating Barycenters of Distributions with Neural Optimal Transport

no code implementations6 Feb 2024 Alexander Kolesov, Petr Mokrov, Igor Udovichenko, Milena Gazdieva, Gudmund Pammer, Evgeny Burnaev, Alexander Korotin

Given a collection of probability measures, a practitioner sometimes needs to find an "average" distribution which adequately aggregates reference distributions.

Calibration of the Bass Local Volatility model

no code implementations24 Nov 2023 Beatrice Acciaio, Antonio Marini, Gudmund Pammer

The Bass local volatility model introduced by Backhoff-Veraguas--Beiglb\"ock--Huesmann--K\"allblad is a Markov model perfectly calibrated to vanilla options at finitely many maturities, that approximates the Dupire local volatility model.

Energy-Guided Continuous Entropic Barycenter Estimation for General Costs

no code implementations2 Oct 2023 Alexander Kolesov, Petr Mokrov, Igor Udovichenko, Milena Gazdieva, Gudmund Pammer, Anastasis Kratsios, Evgeny Burnaev, Alexander Korotin

Optimal transport (OT) barycenters are a mathematically grounded way of averaging probability distributions while capturing their geometric properties.

Quantitative Fundamental Theorem of Asset Pricing

no code implementations29 Sep 2022 Beatrice Acciaio, Julio Backhoff, Gudmund Pammer

In this paper we provide a quantitative analysis to the concept of arbitrage, that allows to deal with model uncertainty without imposing the no-arbitrage condition.

Designing Universal Causal Deep Learning Models: The Geometric (Hyper)Transformer

no code implementations31 Jan 2022 Beatrice Acciaio, Anastasis Kratsios, Gudmund Pammer

Several problems in stochastic analysis are defined through their geometry, and preserving that geometric structure is essential to generating meaningful predictions.

Time Series Time Series Analysis

From Bachelier to Dupire via Optimal Transport

no code implementations23 Jun 2021 Mathias Beiglböck, Gudmund Pammer, Walter Schachermayer

Famously mathematical finance was started by Bachelier in his 1900 PhD thesis where - among many other achievements - he also provides a formal derivation of the Kolmogorov forward equation.

Disease Momentum: Estimating the Reproduction Number in the Presence of Superspreading

no code implementations16 Dec 2020 Kory D. Johnson, Mathias Beiglböck, Manuel Eder, Annemarie Grass, Joachim Hermisson, Gudmund Pammer, Jitka Polechová, Daniel Toneian, Benjamin Wölfl

Our models demonstrate that the estimation uncertainty of the reproduction number increases with superspreading and that this improves the performance of prediction intervals.

Prediction Intervals

Stability of martingale optimal transport and weak optimal transport

no code implementations8 Apr 2019 Julio Backhoff-Veraguas, Gudmund Pammer

Under mild regularity assumptions, the transport problem is stable in the following sense: if a sequence of optimal transport plans $\pi_1, \pi_2, \ldots$ converges weakly to a transport plan $\pi$, then $\pi$ is also optimal (between its marginals).

Probability Mathematical Finance

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