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arXiv 2002.01165math.FAmath.RT
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Radon变换:对偶对与不可约表示

Radon Transform: Dual Pairs and Irreducible Representations

Giovanni S. Alberti, Francesca Bartolucci, Filippo De Mari, Ernesto De Vito

摘要:

我们说明了在[SIAM J. Math. Anal.,51(6),4356-4381],其可以被描述为对偶$G$ -齐次对$(X,Ξ)$的Helgason理论的变型,并且其允许我们证明许多现有Radon变换的交织性质和反演公式。本文详细分析了对偶对理论中的一个重要方面,即映射标号到流形$ξ\to\hatξ$的内射性,并证明了它是$G$在$L^2(Ξ)$上的拟正则表示不可约的必要条件.我们进一步解释了[SIAM J. Math. Anal.,51(6),4356-4381]适用于$\mathbb R^3$中的经典Radon和X射线变换。

英文摘要:

We illustrate the general point of view developed in [SIAM J. Math. Anal., 51(6), 4356-4381] that can be described as a variation of Helgason's theory of dual $G$-homogeneous pairs $(X,Ξ)$ and which allows us to prove intertwining properties and inversion formulae of many existing Radon transforms. Here we analyze in detail one of the important aspects in the theory of dual pairs, namely the injectivity of the map label-to-manifold $ξ\to\hatξ$ and we prove that it is a necessary condition for the irreducibility of the quasi-regular representation of $G$ on $L^2(Ξ)$. We further explain how the theory in [SIAM J. Math. Anal., 51(6), 4356-4381] applies to the classical Radon and X-ray transforms in $\mathbb R^3$.

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