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請輸入英文單字,中文詞皆可:
quantifier
XDict
n
. 數量詞,量記號
PyDict
數量詞,量記號
Taiwan
MOE
computer
dictionary
(
moecomp
)
quantifier
量詞
Network
Terminology
(
netterm
)
quantifier
量詞
WordNet
(
r
)
3
.
0
(
2006
) (
WordNet
)
quantifier
n
1
: (
logic
)
a
word
(
such
as
`
some
'
or
`
all
'
or
`
no
')
that
binds
the
variables
in
a
logical
proposition
[
synonym
: {
quantifier
},
{
logical
quantifier
}]
2
: (
grammar
)
a
word
that
expresses
a
quantity
(
as
`
fifteen
'
or
`
many
')
The
Free
On
-
line
Dictionary
of
Computing
(
foldoc
)
An
operator
in
{
predicate
logic
}
specifying
for
which
values
of
a
variable
a
formula
is
true
.
Universally
quantified
means
"
for
all
values
" (
written
with
an
inverted
A
,
{
LaTeX
} \
forall
)
and
existentially
quantified
means
"
there
exists
some
value
" (
written
with
a
reversed
E
, {
LaTeX
}
\
exists
).
To
be
unambiguous
,
the
set
to
which
the
values
of
the
variable
belong
should
be
specified
,
though
this
is
often
omitted
when
it
is
clear
from
the
context
(
the
"
universe
of
discourse
").
E
.
g
.
Forall
x
.
P
(
x
) <=>
not
(
Exists
x
.
not
P
(
x
))
meaning
that
any
x
(
in
some
unspecified
set
)
has
property
P
which
is
equivalent
to
saying
that
there
does
not
exist
any
x
which
does
not
have
the
property
.
If
a
variable
is
not
quantified
then
it
is
a
{
free
variable
}.
In
{
logic
programming
}
this
usually
means
that
it
is
actually
universally
quantified
.
See
also
{
first
order
logic
}.
(
2002
-
05
-
21
)
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