Understanding the Parity and Order of Permutations

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In summary, the order of a permutation is the number of elements in a set that are moved by the permutation. It can be calculated by finding the least common multiple of the cycle lengths in the permutation cycle notation or by raising the permutation to a power. The order is important in determining the structure and properties of a group in abstract algebra. The size of a permutation refers to the total number of elements in the set that the permutation is acting on, while the order refers to the number of elements that are moved. The order of a permutation cannot be greater than the size of the permutation.
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wakko101
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I'm a bit confused about something. Does the parity of a permutation (i.e. if it is even or odd) tell you if the order of the permutation is even or odd, or are they unrelated?

Any insight would be appreciated.

Cheers,
W. =)
 
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What are you calling the order of a permutation? The order of the cycle length? If so, then yes, they are related. A two cycle is odd. A three cycle is even. Etc.
 

Related to Understanding the Parity and Order of Permutations

What is the definition of "order of a permutation"?

The order of a permutation is the number of elements in a set that are moved by the permutation. In other words, it is the number of elements that are rearranged or switched from their original position.

How is the order of a permutation calculated?

The order of a permutation can be calculated by finding the least common multiple (LCM) of the cycle lengths in the permutation cycle notation. Alternatively, it can be calculated by raising the permutation to a power until it returns to its original state.

Why is the order of a permutation important?

The order of a permutation is important because it tells us how many times the permutation can be applied before returning to the identity permutation. It also helps in determining the structure and properties of a group in abstract algebra.

What is the difference between the order of a permutation and the size of a permutation?

The order of a permutation refers to the number of elements that are moved by the permutation, while the size of a permutation refers to the total number of elements in the set that the permutation is acting on.

Can the order of a permutation be greater than the size of the permutation?

No, the order of a permutation cannot be greater than the size of the permutation. This is because the order is determined by the number of elements that are moved, and there cannot be more elements moved than the total number of elements in the set.

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