What are the elements of the subgroups <3> and <15> in Z(18)?

In summary, a cyclic group is a mathematical structure with a generator that can generate all other elements by applying a group operation. To determine if a group is cyclic, you can check for a generator that can generate all elements. A cyclic group can have multiple generators and its order is the number of elements. Cyclic groups are used in science for applications such as cryptography, studying symmetries, and solving mathematical problems.
  • #1
Benzoate
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0

Homework Statement



List the elements of the subgroups <3> abd <15> in Z(18)


Homework Equations





The Attempt at a Solution



<3>={0,3,6,9,12,15} .
<15> ={0,15}

Together , I can conclude that the number of elements amongst <3> and <15> add up to 7 elements.
 
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  • #2
It's all correct, although I'm not sure that:
Benzoate said:
Together , I can conclude that the number of elements amongst <3> and <15> add up to 7 elements.
Is all that interesting.
 
  • #3
Benzoate said:
<15> ={0,15}

<15> has more elements than that.
 

Related to What are the elements of the subgroups <3> and <15> in Z(18)?

1. What is a cyclic group?

A cyclic group is a mathematical structure that consists of a set of elements and an operation that combines any two elements to form a third element. The key feature of a cyclic group is that it contains a special element, called the generator, which can be used to generate all other elements in the group by repeatedly applying the operation to itself.

2. How do you determine if a group is cyclic?

To determine if a group is cyclic, you can check if it has a generator that can generate all other elements in the group. This can be done by applying the operation to the generator repeatedly, and if all elements in the group are generated, then the group is cyclic.

3. Can a cyclic group have more than one generator?

Yes, a cyclic group can have multiple generators. In fact, every element in a cyclic group can be a generator, as long as it can generate all other elements in the group when repeatedly applying the group operation to itself.

4. What is the order of a cyclic group?

The order of a cyclic group is the number of elements in the group. For example, if a cyclic group has a total of 10 elements, then its order is 10.

5. How are cyclic groups used in science?

Cyclic groups have many applications in science, particularly in the field of cryptography. They are also used in physics to study symmetries and in chemistry to describe the behavior of molecules. Additionally, cyclic groups have connections to number theory and can be used to solve certain mathematical problems.

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