- umbral calculus
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English-Russian Dictionary on Probability, Statistics, and Combinatorics. — Philadelphia and Moscow. Society for Industrial and Applied Mathematics and TVP Science Publishers. K. A. Borovkov. 1994.
umbral calculus
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Umbral calculus — In mathematics before the 1970s, the term umbral calculus was understood to mean the surprising similarities between otherwise unrelated polynomial equations, and certain shadowy techniques that can be used to prove them. These techniques were… … Wikipedia
Calculus (disambiguation) — Calculus is Latin for pebble, and has a number of meanings in English: In mathematics and computer science Calculus , in its most general sense, is any method or system of calculation. To modern theoreticians the answer to the question what is a… … Wikipedia
Umbral — is derived from the Latin umbra , meaning shadow . It is also the Spanish word for threshold , and sometimes used as a surname in that language.Umbral may refer to: *Umbral calculus *Umbra *Francisco Umbral *Umbra (World of Darkness) … Wikipedia
Función umbral — En matemáticas, una función umbral (más conocida en inglés como threshold function) es una función booleana monótona ƒ : {0,1}n → {0,1}, donde existen n+1 reales no negativos w1, w2, ..., wn, t tales que:[1] Mediante esta función es pos … Wikipedia Español
Finite difference — A finite difference is a mathematical expression of the form f(x + b) − f(x + a). If a finite difference is divided by b − a, one gets a difference quotient. The approximation of derivatives by finite differences… … Wikipedia
Calcul Symbolique — En mathématiques, avant les années 1970, le terme calcul symbolique (en anglais, umbral calculus , ce qui se traduit par calcul obscur ) était compris comme signifiant les similarités surprenantes entre des équations polynômiales non reliées… … Wikipédia en Français
Calcul symbolique — En mathématiques, avant les années 1970, le terme calcul symbolique (en anglais, umbral calculus , ce qui se traduit par calcul obscur ) était compris comme signifiant les similarités surprenantes entre des équations polynômiales non reliées… … Wikipédia en Français
Appell sequence — In mathematics, an Appell sequence, named after Paul Émile Appell, is any polynomial sequence { p n ( x )} n = 0, 1, 2, ... satisfying the identity:{d over dx} p n(x) = np {n 1}(x),and in which p 0( x ) is a non zero constant.ExamplesAmong the… … Wikipedia
Calcul ombral — En mathématiques, le calcul ombral est le nom d un ensemble de techniques de calcul formel qui, avant les années 1970, était plutôt appelé en français calcul symbolique. Il s agit de l étude des similarités surprenantes entre certaines formules… … Wikipédia en Français
Binomial type — In mathematics, a polynomial sequence, i.e., a sequence of polynomials indexed by { 0, 1, 2, 3, ... } in which the index of each polynomial equals its degree, is said to be of binomial type if it satisfies the sequence of identities:p n(x+y)=sum… … Wikipedia
Pochhammer symbol — In mathematics, the Pochhammer symbol introduced by Leo August Pochhammer is the notation (x)n, where n is a non negative integer. Depending on the context the Pochhammer symbol may represent either the rising factorial or the falling factorial… … Wikipedia
