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Qu'est-ce (qui) est persistent variables - définition

SPECIES OF PLANT

Persistent Trillium; Persistent trillium; Persistent wakerobin

free variable

$Tree summarizing the syntax of the expression <math>\forall x\, ((\exists y\, A(x)) \vee B(z)) </math>$

CLASSIFICATION OF VARIABLES IN A LOGIC FORMULA BASED ON WHETHER OR NOT THEY ARE INSIDE THE SCOPE OF A QUANTIFIER

Free variable; Bound variable; Variable binding operation; Variable-binding operation; Free variables; Bound variables; Unbound variable; Unbound variables; Variable-binding operator; Variable binding operator; Free and bound variables; Bound variable clash; Free and bound variable; Placeholder (computer programming); Free variables & bound variables; Free occurrence; Placeholder variable; Apparent variable

1. A variable referred to in a function, which is not an argument of the function. In lambda-calculus, x is a {bound variable} in the term M = x . T, and a free variable of T. We say x is bound in M and free in T. If T contains a subterm x . U then x is rebound in this term. This nested, inner binding of x is said to "shadow" the outer binding. Occurrences of x in U are free occurrences of the new x. Variables bound at the top level of a program are technically free variables within the terms to which they are bound but are often treated specially because they can be compiled as fixed addresses. Similarly, an identifier bound to a recursive function is also technically a free variable within its own body but is treated specially. A closed term is one containing no free variables. See also closure, lambda lifting, scope. 2. In logic, a variable which is not quantified (see quantifier).

Persistent hyperplastic primary vitreous

HUMAN DISEASE

Persistent Hyperplastic Primary Vitreous; Persistent hyperplasia of the primary vitreous; Persistent hyperplastic of the primary vitreous; PHPV; Persistent fetal vasculature; Persistent Fetal Vascular Syndrome; Persistent fetal vascular syndrome; Persistent foetal vascular syndrome; Persistent Foetal Vascular Syndrome; Persistent Foetal Vasculature Syndrome; Persistent Fetal Vasculature Syndrome; Persistent fetal vasculature syndrome; Persistent hyperplastic primary vitreous

Persistent hyperplastic primary vitreous (PHPV), also known as persistent fetal vasculature (PFV), is a rare congenital developmental anomaly of the eye that results following failure of the embryological, primary vitreous and hyaloid vasculature to regress. It can be present in three forms: purely anterior (persistent tunica vasculosa lentis and persistent posterior fetal fibrovascular sheath of the lens), purely posterior (falciform retinal septum and ablatio falcicormis congenita) and a combination of both.

https://en.wikipedia.org/wiki/Persistent_hyperplastic_primary_vitreous

Persistent world

VIDEO GAME TERM

Persistently online; Persistent state world

A persistent world or persistent state world (PSW) is a virtual world which, by the definition by Richard Bartle, "continues to exist and develop internally even when there are no people interacting with it". The first virtual worlds were text-based and often called MUDs, but the term is frequently used in relation to massively multiplayer online role-playing games (MMORPGs) and pervasive games.

https://en.wikipedia.org/wiki/Persistent_world

Wikipédia

Trillium persistens

Trillium persistens, the persistent trillium, is a North American species of flowering plants in the genus Trillium of family Melanthiaceae (formerly Trilliaceae). The plant is also called the persistent wakerobin.

Persistent trillium is an endangered herbaceous perennial plant that grows to a height of 20–30 cm, with three leaves in a whorl near the top of the stem just below the flower; each leaf is broad lanceolate, 3–9 cm long and 1.5–3.5 cm broad. The white flower has three petals, each petal 2–3.5 cm long and 0.5–1 cm broad.

This plant has a limited range in parts of the United States in the northeastern Georgia and northwestern South Carolina.

https://en.wikipedia.org/wiki/Trillium persistens