- 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...
- Fate/Extella: The
Umbral Star (****anese: フェイト/エクステラ, Hepburn: Feito/Ekusutera) is an
action video game
developed and
published by Marvelous. The game is...
- Pérez Martínez (11 May 1932 – 28
August 2007),
better known as
Francisco Umbral, was a
Spanish journalist, novelist,
biographer and essayist.
Although he...
-
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...
- 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...
- each
polynomial equals its degree,
satisfying conditions related to the
umbral calculus in combinatorics. They are
named for
Isador M. Sheffer. Fix a polynomial...
-
repeating every 18
years and 11 days,
containing 72 eclipses, 41 of
which are
umbral. The
first eclipse was on 10
March 1179 and the last will be on 3 May 2459...
-
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...
