1. Construct a Cayley table for the group of symmetries of a square, write each element as a permutation. Label each vertex of the square by the numbers 1,2,3,4 clockwise, label the upper left corner by 1. For example the 90°-rotation should be 1 2 3 234 1). Determine, with proof, whether or not this group is abelian. Call this group D
1. Construct a Cayley table for the group of symmetries of a square, write each element as a permutation. Label each vertex of the square by the numbers 1,2,3,4 clockwise, label the upper left corner by 1. For example the 90°-rotation should be 1 2 3 234 1). Determine, with proof, whether or not this group is abelian. Call this group D
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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![1. Construct a Cayley table for the group of symmetries of a square, write each element as a permutation. Label each
vertex of the square by the numbers 1,2,3,4 clockwise, label the upper left corner by 1. For example the 90°-rotation
1 2 3
should be 1). Determine, with proof, whether or not this group is abelian. Call this group D
2 3 4
1 2 3 4
2. Find the subgroup of D₁, of Problem 1, generated by the element (1234) =
2
3
3. Find the center of D₁.
4. Find the centralizer of the element (24) =
2)
1 4 3 2,
1 2 3 4
in D₁
4
1)
and find its order.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4f512928-4e59-4a77-9903-8022a1f1a946%2F23473efb-d7a7-4e47-ab36-61b013b5a2c8%2F38yjuoe_processed.png&w=3840&q=75)
Transcribed Image Text:1. Construct a Cayley table for the group of symmetries of a square, write each element as a permutation. Label each
vertex of the square by the numbers 1,2,3,4 clockwise, label the upper left corner by 1. For example the 90°-rotation
1 2 3
should be 1). Determine, with proof, whether or not this group is abelian. Call this group D
2 3 4
1 2 3 4
2. Find the subgroup of D₁, of Problem 1, generated by the element (1234) =
2
3
3. Find the center of D₁.
4. Find the centralizer of the element (24) =
2)
1 4 3 2,
1 2 3 4
in D₁
4
1)
and find its order.
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