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(gäp), city (1990 pop. 35,647), capital of Hautes-Alpes dept., SE France, on the Luye River at the foot of the Dauphiné Alps. A center for tourism, Gap is an agricultural market that manufactures clothing, wood products, and construction materials. Founded by Augustus c.14 B.C., it was the capital of medieval Gapençais, which was annexed to the crown of France in 1512. The city was devastated during the Wars of Religion (16th cent.).


A region not adequately covered by the main lobes of a radar antenna.
(computer science)
A uniformly magnetized area in a magnetic storage device (tape, disk), used to indicate the end of an area containing information.
The spacing between two electric contacts.
A break in a closed magnetic circuit, containing only air or filled with a nonmagnetic material.
A short region that is missing in one strand of a double-stranded deoxyribonucleic acid.
Any sharp, deep notch in a mountain ridge or between hills.
An opening at the point of closest approach between faces of members in a weld joint.


An opening, as in a wall; an open joint.


i. Any space where the imagery fails to meet the minimum coverage requirements. This might be a space not covered by imagery or one where the minimum specified overlap was not obtained.
ii. Breaks in continuous radar coverage. See gap-filler radar.


1. a break in a line of hills or mountains affording a route through
2. Chiefly US a gorge or ravine
3. Electronics
a. a break in a magnetic circuit that increases the inductance and saturation point of the circuit
b. See spark gap


(mathematics, tool)
Groups Algorithms and Programming.

A system for symbolic mathematics for computational discrete algebra, especially group theory, by Johannes Meier, Alice Niemeyer, Werner Nickel, and Martin Schonert of Aachen. GAP was designed in 1986 and implemented 1987. Version 2.4 was released in 1988 and version 3.1 in 1992.

Sun version.

["GAP 3.3 Manual, M. Schonert et al, Lehrstuhl D Math, RWTH Aachen, 1993].


(1) The space between blocks of data on magnetic tape.

(2) The space in a read/write head over which magnetic flux (energy) flows causing the underlying magnetic tape or disk surface to become magnetized in the corresponding direction.
References in periodicals archive ?
Alkalemia => possible Respiratory Alkalosis => Expected HCO3- 21 => Bicarbonate Gap 17 => Expected HCO3- and Bicarbonate gap tell us that this patient had a pre-existing Metabolic Alkalosis => Anion Gap 29 => patient also has an Increased Gap Metabolic Acidosis.
3 [micro]mol/l)) we did not see metabolic acidosis or evidence of citrate intoxication (defined as metabolic acidosis with increased anion gap not explained by lactate) in any patient, similar to Mitchell et all (19).
In 1995, Kellum and colleagues described the tool as the 'strong ion gap' (SIG), an advance on its predecessor, the anion gap (AG) (5).
Detection of mitochondrial disorders demands extensive evaluation of any patient with pain, fatigue, weakness, and an elevated anion gap.
Very high plasma lactate concentrations and an increasing anion gap confirmed the lactic acidosis in this case.
The increase in the osmolal gap is due to accumulation of the parent alcohol, whereas the increase in the serum anion gap is due to accumulation of the organic-acid metabolites.
Common features suggesting methanol poisoning are a suitable history, increased anion gap and increased osmolar gap (2,3).
The anion gap ( Na--(HCO3 + CI) is normally less than 16 mEq/L .
On admission, he was diagnosed with anion gap metabolic acidosis which correlates with the laboratory results in Table 1.
Although metformin can cause mild lactic acidemia in type 2 diabetes mellitus patients with normal renal function, (1,2) there are very few reports of lactic acidosis (blood lactate >5 mEq/L, anion gap > 15, arterial pH <7.
Prior to administration of methylene blue, the methemoglobin concentration was 45%, with an increased anion gap metabolic acidosis (Tables 1 and 2).
In DKA, the high anion gap is attributed largely to excessive production of blood ketone bodies, and serum [beta]-hydroxybutyrate quantification is recommended for the diagnosis and monitoring of DKA (2).