Objective
function The function to be maximized or minimized
in a linear programming problem
Obtuse angle
An angle that is greater than a right angle and smaller
than a straight angle.
Obtuse triangle
A triangle with one obtuse angle.
Octagon A polygon
with 8 sides.
Octal
numeration system A numeration system with 8 symbols.
Odd vertex
In a network, a vertex of odd degree; that is, with an odd
number of arcs or line segments connected at that vertex.
Odds If s
+ f = n, where s is the number of outcomes
considered favorable to an event E and n is
the total number of possibilities, then the odds in favor
of E is s/f and the odds against E
is f/s .
One
The first counting number; it is also called the identity
element for multiplication; that is, it satisfies the property
that
x(1) = (1)x = x
for all numbers x.
One-dimensional
coordinate system A real number line.
One-to-one
correspondence Between two sets A and B,
this means each element of A can be matched with
exactly one element of B and also each element of
B can be matched with exactly one element of A
.
Online To be connected
to a computer network or to the Internet.
Open-ended loan
A preapproved line of credit that the borrower can access
as long as timely payments are made and the credit line
is not exceeded. It is usually known as a credit card loan.
Open half-plane
See Half-plane.
Open equation
An equation that has at least one variable.
Operator A rule,
such as negation, that modifies the value of a simple statement,
or a rule that combines two simple statements, such as conjunction
or disjunction.
Opposite side
In a right triangle, an acute angle is made up of two sides.
The opposite side of the angle refers to the third side
that is not used to make up the sides of the angle.
Opposites
Opposites x and -x are the same distance from
0 on the number line but in opposite directions; -x
is also called the additive inverse of x.
Do not confuse the symbol ì - " meaning opposite with the
same symbol as used to mean subtraction or negativE.
Optimum solution
The maximum or minimum value in a linear programming problem.
Or A common translation
for the connective of disjunction.
OR-gate An electrical
circuit that simulates disjunction. That is, the circuit
is on when either of two switches is on.
Order Refers to
an order symbol. In reference to matrices, it refers to
the number of rows and columns in a matrix. When used in
relation to a matrix it is the same as the dimension of
the matrix.
Order
of an inequality
Order of
operations If no grouping symbols are used in a
numerical expression, first perform all multiplications
and divisions from left to right, and then perform all additions
and subtractions from left to right.
Order symbols
Ordered pair A
pair of numbers, written (x, y), in which the order
of naming is important. The numbers x and y
are sometimes called the first and second components of
the pair and are called the coordinates of the point designated
by (x, y ).
Ordered Triple
Three numbers, written (x, y, z), in which the order
of the components is important.
Ordinary annuity
See Annuity.
Ordinary interest
The calculation of interest assuming a year has 360 days.
In this book, we assume ordinary interest unless otherwise
stated.
Ordinate The
vertical coordinate in a two-dimensional system of rectangular
coordinates, usually denoted by y .
Origin The point
designating 0 on a number line. In two dimensions, the point
of intersection of the coordinate axes; the coordinates
are (0, 0).
Origination fee
A fee paid to obtain a real estate loan.
Ounce (1) A unit
of capacity in the United States system that is equal to
1/128 of a gallon. (2) A unit of mass in the United States
system that is equal to 1/16 of a pound.
Output A method
of getting information out of a computer.
Output device
Component of a system that allows the output of data. The
most common output device is a printer.
Overlapping
sets Sets whose intersection is not empty.
