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The Classical Umbral Calculus

SIAM Journal on Mathematical Analysis, 1994
In this paper the authors, Rota and Taylor, present a simple and rigorous treatment of umbral calculus which has been discussed in the past, among others, by J. Blissard, E. T. Bell, and J. Riordan. The basic construct here is a polynomial ring in several variables, on which no less than three equivalence relations are defined.
Rota, G.-C., Taylor, B. D.
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Umbrales paradójicos

Tópicos del Seminario, 2016
Al circunscribir el enfoque de este artículo a la paradoja en los discursos, se propone dos linajes de pensadores que atraviesan la historia occidental: unos, manipulan y refutan artefactos paradójicos relacionados con metalenguajes conceptuales, lógicos y científicos; otros, vuelcan en su discurso flujos aporéticos que testimonian no sólo el ...
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Umbrales

World Literature Today, 1994
Leland Guyer, Federico Patán
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Umbral flares

Solar Physics, 1978
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