factor

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factor,

in arithmetic, any number that divides a given number evenly, i.e., without any remainder. The factors of 12 are 1, 2, 3, 4, 6, and 12. Similarly in algebra, any one of the algebraic expressions multiplied by another to form a product is a factor of that product, e.g., a+b and ab are factors of a2b 2, since (a+b)(ab)=a2b2. In general, if r is a rootroot,
in mathematics, number or quantity r for which an equation f(r)=0 holds true, where f is some function. If f is a polynomial, r is called a root of f; for example, r=3 and r
of a polynomialpolynomial,
mathematical expression which is a finite sum, each term being a constant times a product of one or more variables raised to powers. With only one variable the general form of a polynomial is a0xn+a1x
equation f(x)=0, then (xr) is a factor of the polynomial f(x).

factor

[′fak·tər]
(mathematics)
For an integer n, any integer which gives n when multiplied by another integer.
For a polynomial p, any polynomial which gives p when multiplied by another polynomial.
For a graph G, a spanning subgraph of G with at least one edge.
(statistics)
A quantity or a variable being studied in an experiment as a possible cause of variation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

factor

1. Maths
a. one of two or more integers or polynomials whose product is a given integer or polynomial
b. an integer or polynomial that can be exactly divided into another integer or polynomial
2. Med any of several substances that participate in the clotting of blood
3. Law, Commerce a person who acts on another's behalf, esp one who transacts business for another
4. former name for a gene
5. Commercial law a person to whom goods are consigned for sale and who is paid a factorage
6. (in Scotland) the manager of an estate
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

factor

A quantity which is multiplied by another quantity.

factor

A number that divides evenly into another number. For example, 3 and 4 are factors of 12. See factorial and IFP.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
The endothelium-derived relaxing factors (EDRFs), which are predominant in healthy blood vessels and promote vascular protection, include nitric oxide (NO, Furchgott and Zawadzki 1980), endothelium-derived hyperpolarizing factor (EDHF, Chen et al.
In this series of experiments, endothelium intact arteries were incubated for 30min with inhibitors of production of diverse endothelium-derived relaxing factors before preconviction with phenylephrine.
Endothelium-derived NO or a closely-related molecule was initially described as endothelium-derived relaxing factor (EDRF) (25-27).
Flow-induced release of endothelium-derived relaxing factor. Am J Physiol 1986;250: H 1145-9.
Healthy endothelial cells produce balanced amounts of endothelium-derived relaxing factors (EDRFs) and endothelium-derived contracting factors to support the cardiovascular system.
These mediators can be divided into two types: (1) vasodilators, such as endothelium-derived relaxing factors (EDRFs), nitric oxide (NO), prostacyclin (PGI2) [8], and endothelium-derived hyperpolarizing factors (EDHFs) [13-16], and (2) vasoconstrictors, which include endothelin-1, reactive oxygen species (ROS), platelet-activating factor (PAF) [8], and arachidonic acid (AA) cyclooxygenase-derived metabolites [17].
It is well-known that the endothelium plays an important role in the regulation of vascular tone by synthesis and release of endothelium-derived relaxing factors (EDRFs), including NO, prostacyclin ([PCI.sub.2]) and EDHF (Luscher 1990).
Vascular endothelium regulates the underlying smooth muscle layer and vascular tone by release of endothelium-derived relaxing factors such as nitric oxide (NO), prostaglandins, and endothelium-derived hyperpolarizing factor (EDHF) as well as vasoconstricting factors such as endothelin, superoxide (O2-), and thromboxane (25, 28-32).

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