Half Line

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Related to Half Line: half life

half line

[′haf ¦līn]
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Half Line


in mathematics, the set of points on a line that lie on one side of some point of the line. The coordinates x of the points of a half line satisfy one, and only one, of the inequalities x > a and x < a, where a is a constant. The point x = a is called the boundary of the half line. If the boundary is included in the half line, the half line is said to be closed. A closed half line is also called a ray.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Let us consider positive odd numbers which share a prime factor>1 as a kind, then the positive directional half line of the number axis consists of infinite many equivalent line segments on same permutation of X kinds' odd points plus odd points amongst the X kinds' odd points, where X [greater than or equal to] 1.
The team official said Kashif was the best choice among the standby players and it is hoped that he will fill the void demonstrating a much higher level of game during his responsibilities as a half line player.
The Malaysian girls constantly carried a threat going forward and should have been level in the 25th minute when Nor Azlin Sumantri benefited from a defensive lapse on the half line to create a one- on- one opportunity with goalkeeper Yogita Bali, but hit wide.
Qatar struck parity in the 32nd minute through Magid Mohamed, who made a solo run with the ball from near the half line to score the goal.
It turns out that a satisfactory inverse scattering framework can be effectively employed only for certain boundary conditions (so-called linearizable boundary conditions for the half line problem), such as homogeneous Dirichlet, Neumann or Robin conditions.
Eoe1/4EoThe main tactic we use against the Netherlands is to defend at the half line and play for the counter-attack,Eoe1/4A[yen] he said.
"Well firstly you have 65-70ft tall cable machines, an inch and a half line that's 4,000ft long, and you're putting 20,000lbs of turn on it.
and an enlarged 13-team entry list for next season that included newboys Mano Campos and USF1, Mosley's 14-year tenure was ended with a two and half line statement.
A line of 12 syllables with a caesura, or pause, after the sixth syllable and with major stresses on the sixth and on the last syllable and one secondary accent in each half line. Because six syllables is a normal breath group and the secondary stresses can be on any other syllables in the line, the alexandrine is a flexible form, adaptable to a wide range of subjects.
John Peine, former president of the union that represented workers there, describes it as a "half line," since it rarely ran 40 hours a week and was completely dependent on parts from Mexico.
Hamed Ismail, tearing away on the right flank near the half line, slipped in a long ball to striker Bounedjah who was close to the Al Rayyan box.
But, we still struggled to get things set up on the offensive end, even when we got the ball across the half line against their pressure."