Most definitions of integers presuppose a numeric set, from which integers can be selected based on some predicate (e.g. logical condition). However, one can give a pure constructive definition. That is, we can create objects, which behave exactly as integers with respect to the basic arithmetic operations defined on the integers
Let N be the set of natural numbers. Let (a,b) and (a',b') be ordered pairs from the Cartesian product N x N. First, we define a relation ~rz on N x N by saying that (a,b) is related to (a',b') iff a + b' = a' + b. Written more technically:
(a,b) ~/rz (a',b') :<=> a + b' = a' + b
Then this relation is an equivalence relation (can easily be proven). Then
Z := N x N/rz
If [(a,b)] and [(a', b')] denote the equivalence classes containing (a, b) and (a', b'), respectively, and if we define addition and multiplication of those equivalence classes as:
1. [(a,b)] + [(a',b')] = [(a + a', b + b')]
2. [(a,b)] * [(a', b')] = [(a * b' + b * a', a * a' + b * b')]
then these operations are well-defined and the resulting set of all equivalence classes has all of the familiar properties of the integers (it therefore serves to define the integers based only on the natural numbers).
In this setting, a negative integer is an equivalence class, such that its representatives are of the form (a,b) with the property "b > a", where a, b are natural numbers.
Examples in this representation:
(-3) = [(3,0)] = [(8,5)]
(0) = [(0,0)] = [(137,137)]
(5) = [(0,5)] = [(17,22)]
Easy Ideas for Negative Integersnegative integers:= {y: x+y=0 for any positive integer x}This means that if there is a natural number (the ones you use for counting) or the number zero then the negative integers are all the ones you can add to them to make a sum equal zero. example: 4+(-4)=0
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its anything with a - on it. it means that it is not a positive number, a number with a vaule less than 0
Any number below 0.
An integer is a whole number - a number without decimals. Negative means less than zero. Negative number have a minus sign in front of them. So, the negative integers are the numbers:
-1, -2, -3, -4, -5, -6, etc.
Yes. The product of a negative integer and a positive integer is a negative integer.
no sometimes there positive i
A negative integer. Every time.
When the positive integer is greater than the negative integer.
negative*negative=positive ex. negative 2*negative 2= positive 4
a negative integer
Yes. The product of a negative integer and a positive integer is a negative integer.
A negative integer multiplied by a negative integer is always a positive integer product. -x * -y = xy
As long as the negative integer is greater than the positive integer, a negative integer will result from addition, subtraction, multiplication, and division.
Yes, and also a negative integer divided by a negative integer is equal to a positive number (but not necessarily an integer).
you get a negative integer
It is positive as for example: -2*-2*-2*-2 = 16
negative integer
Yes.
No. The sum of a positive integer and a negative integer has the same sign as the larger integer.
When the absolute value of the positive integer is smaller than the absolute value of the negative one.
negative