open ball
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Ball (mathematics) — N ball redirects here. For the video game, see N ball (game). A ball is the inside of a sphere In mathematics, a ball is the space inside a sphere. It may be a closed ball (including the boundary points) or an open ball (excluding them). These… … Wikipedia
Open mapping theorem (functional analysis) — In functional analysis, the open mapping theorem, also known as the Banach–Schauder theorem (named after Stefan Banach and Juliusz Schauder), is a fundamental result which states that if a continuous linear operator between Banach spaces is… … Wikipedia
Open set — Example: The points (x, y) satisfying x2 + y2 = r2 are colored blue. The points (x, y) satisfying x2 + y2 < r2 are colored red. The red points form an open set. The blue points form a closed set. The union of the red and blue points is a… … Wikipedia
open set — noun a) Informally, a set such that the target point of a movement by a small amount in any direction from any point in the set is still in the set; exemplified by a full circle without its boundary. b) A set which can be described as an… … Wiktionary
Ball lightning — is an atmospheric electrical phenomenon, the physical nature of which is still controversial. The term refers to reports of luminous, usually spherical objects which vary from pea sized to several meters in diameter. It is sometimes associated… … Wikipedia
Open de Brisbane 2009 — (ATP) Open de Brisbane 2009 … Wikipédia en Français
Open de Brisbane 2009 (ATP) — Open de Brisbane 2009 … Wikipédia en Français
OPEN LFB — Création 2006 Organisateur(s) FFBB Ligue féminine de basket … Wikipédia en Français
Ball State University — Motto Education Redefined Established 1918 (details) Type Public coeducational Endowment … Wikipedia
Open de Brisbane 2010 (ATP) — Open de Brisbane 2010 … Wikipédia en Français
