Natural base
The natural base is e; it refers to an exponential with
a base e.
Natural logarithm
A logarithm to the base e, written ln N .
Natural numbers
N = {1, 2, 3, 4, 5, ... } the positive integers, also called
the counting numbers.
Negation
A logical connective that changes the truth value of a given
statement.
Negative
of a conditional
Negative number
A number less than zero.
Negative sign
The symbol " - " when used in front of a number,
as in -5. Do not confuse with the same symbol used
for subtraction.
Neither . . . nor
Network (1) A
linking together of computers. (2) A set of points connected
by an arc or by line segments.
New Sates
Paradox When a reapportionment of an increased number
of seats causes a shift in the apportionment of existing
states, it is known as the new states paradox.
n-gon A polygon
with n sides.
No p is q
Nonagon A polygon
with 9 sides.
Nonconformable
matrices Matrices that cannot be added or multiplied
because their dimensions are not compatible.
Non-Euclidean
geometry A geometry that results when Euclid's fifth
postulate is not accepted.
Nonrepeating
decimal A decimal representation of a number that
does not repeat.
Nonsingular
matrix A matrix that has an inverse.
Nonterminating
decimal A decimal representation of a number that
does not terminate.
Normal curve
A graphical representation of a normal distribution. Its
high point occurs at the mean, it is symmetric with respect
to this mean, and on each side of the mean has an area that
includes 34.1% of the population within one standard deviation,
13.6% from one to two standard deviations, and about 2.3%
of the population more than two standard deviations from
the mean.
Not A common translation
for the connective of negation.
NOT-gate A logical
gate that changes the truth value of a given statement.
Null set See
Set.
Number A number
represents a given quantity, as opposed to a numeral, which
is the symbol for the number. In mathematics, it generally
refers to a specific set of numbers; for example, counting
numbers, whole numbers, integers, rationals, or real numbers.
If the set is not specified, the assumed usage is to the
set of real numbers.
Number line
A line used to display a set of numbers graphically (the
axis for a one-dimensional graph).
Numeral Symbol
used to denote a number.
Numeration
system A system of symbols with rules of combination
for representing all numbers.
Numerator See
Rational number.
Numerical
coefficient See Coefficient.
