Look up umbral in Wiktionary, the free dictionary.
Umbral is derived from the Latin word umbra, meaning "shadow". It is also the Spanish and Portuguese word for "threshold" and is sometimes used as a surname in those languages.
Umbral may also refer to:
Umbral calculus, the surprising similarity between seemingly unrelated polynomial equations and certain shadowy techniques used to "prove" them
Umbral moonshine, a mysterious connection between Niemeier lattices and Ramanujan's mock theta functions
Francisco Umbral (1932–2007), Spanish journalist, novelist, biographer and essayist
Look up umbral in Wiktionary, the free dictionary. Umbral is derived from the Latin word umbra, meaning "shadow". It is also the Spanish and Portuguese...
In mathematics before the 1970s, the term umbral calculus referred to the surprising similarity between seemingly unrelated polynomial equations and certain...
In mathematics, umbral moonshine is a mysterious connection between Niemeier lattices and Ramanujan's mock theta functions. It is a generalization of the...
Pérez Martínez (11 May 1932 – 28 August 2007), better known as Francisco Umbral, was a Spanish journalist, novelist, biographer and essayist. Although he...
each polynomial equals its degree, satisfying conditions related to the umbral calculus in combinatorics. They are named for Isador M. Sheffer. Fix a polynomial...
mapped to umbral Fourier sums faithfully, i.e., involving the same Fourier coefficients multiplying these umbral basis exponentials. This umbral exponential...
3: Brick-red eclipse. Umbral shadow usually has a bright or yellow rim. L = 4: Very bright copper-red or orange eclipse. Umbral shadow is bluish and has...
partial eclipses happen after the first six umbral ones (counted as "partial eclipses before the umbral eclipses") In order: 10 total, 6 hybrid, 4 annular...
every 18 years and 11 days. It contained 81 eclipses, 43 of which were umbral (24 total, 15 hybrid, 4 annular). The first eclipse occurred on 7 September...
World of Darkness is a series of tabletop role-playing games, originally created by Mark Rein-Hagen for White Wolf Publishing. It began as an annual line...
20(1)". Retrieved 27 March 2014. "Los pueblos indígenas de Colombia en el umbral del nuevo milenio. Población, cultura y territorio: bases para el fortalecimiento...
repeating every 18 years and 11 days, containing 71 eclipses, including 55 umbral eclipses, 12 of which will be hybrid and 43 of which will be total. The...
the fantasy region of Eorzea, five years after the devastating Seventh Umbral Calamity which ended the original version. In the Calamity, the elder primal...
professor at the University of Amsterdam. She is known for formulating the umbral moonshine conjectures and for her work on the connections between K3 surfaces...
specializes in number theory, especially in integer partitions, modular forms, umbral moonshine, the Riemann Hypothesis and the fields of interest to Srinivasa...
of Incompetence". Interactions. 23 (1): 6–7. doi:10.1145/2854002. "En el umbral de la incompetencia". La Opinión (in Spanish). Retrieved November 30, 2013...
backward difference operator. The study of analogies of this type is known as umbral calculus. A general theory covering such relations, including the falling...
shallow total lunar eclipse, with 0.08% of that diameter inside of Earth's umbral shadow, and it was the 30th eclipse of the 132nd saros cycle. April 25 –...
A. Harvey proposed a generalization of this moonshine phenomenon called umbral moonshine, and their conjecture was proved mathematically by Duncan, Michael...
) = x n . {\displaystyle Tp_{n}(x)=x^{n}.\,} In the conventions of the umbral calculus, one often treats this formal power series T {\displaystyle T}...
linked to Umbral calculus by being Sheffer sequences for D / ( D − I ) {\displaystyle D/(D-I)} when multiplied by n ! {\displaystyle n!} . In Umbral Calculus...
repeats every 18 years, 11 days, and contains 70 eclipses, 55 of which are umbral eclipses. The first eclipse in the series was on 25 May 1389 and the last...
repeating every 18 years, 11 days, containing 77 eclipses, 43 of which are umbral (1 annular, 1 hybrid, 41 total). The first eclipse in the series was on...
repeating every 18 years, 11 days, containing 70 eclipses, 41 of which are umbral (6 total, 5 hybrid, 30 annular). The first eclipse in the series was on...
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