Isomorphism of orientation preserving rigid motions

In summary, the isomorphism from the subgroup of GL2(C) to the group of orientation preserving rigid motions is represented by using the argument of a to represent rotation around the z-axis and the real and imaginary parts of b to represent translation along the (x,y) plane.
  • #1
kp266
1
0
Find an isomorphism from the subgroup of GL2(C) of the form
[tex]
\begin{pmatrix}
a & b\\
0 & 1
\end{pmatrix}

,\left | a \right |=1
[/tex] to the group of orientation preserving rigid motions.
*The problem is from Artin's Algebra Chapter5
 
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  • #2
kp266 said:
Find an isomorphism from the subgroup of GL2(C) of the form
[tex]
\begin{pmatrix}
a & b\\
0 & 1
\end{pmatrix}

,\left | a \right |=1
[/tex]

to the group of orientation preserving rigid motions.

*The problem is from Artin's Algebra Chapter5

How about using the argument (angle) of a to represent rotation of the rigid object around the z-axis, and use the real and imaginary parts of b to represent an arbitrary translation along the (x,y) plane? These are orientation preserving motions of rigid objects in R^3.

Torquil
 
  • #3
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  • #4
kp266 said:
Find an isomorphism from the subgroup of GL2(C) of the form
[tex]
\begin{pmatrix}
a & b\\
0 & 1
\end{pmatrix}

,\left | a \right |=1
[/tex] to the group of orientation preserving rigid motions.
*The problem is from Artin's Algebra Chapter5

[tex]
\begin{pmatrix}
a & b\\
0 & 1
\end{pmatrix}

,\left | a \right |=1
[/tex]

goes to az + b.
 

What is isomorphism of orientation preserving rigid motions?

Isomorphism of orientation preserving rigid motions is a mathematical concept that refers to the relationship between two geometric figures or objects that preserves the orientation and shape of the figures. This means that the two figures are similar in terms of size, shape, and orientation.

What are the properties of isomorphism?

There are several properties of isomorphism, including:

  • It is reflexive, meaning that every geometric figure is isomorphic to itself.
  • It is symmetric, meaning that if figure A is isomorphic to figure B, then figure B is isomorphic to figure A.
  • It is transitive, meaning that if figure A is isomorphic to figure B, and figure B is isomorphic to figure C, then figure A is isomorphic to figure C.

How is isomorphism different from congruence?

Isomorphism and congruence are both ways of comparing geometric figures, but they have some key differences. Isomorphism preserves both the orientation and shape of figures, while congruence only preserves the shape. Isomorphism can also involve different types of geometric figures, such as polygons and circles, while congruence is typically used for comparing congruent triangles.

How is isomorphism used in real-world applications?

Isomorphism has many practical applications, particularly in computer science and engineering. It is used to model and compare complex systems, such as chemical compounds or biological structures. It is also used in robotics and computer graphics to simulate real-world movement and motion.

Can all orientation preserving rigid motions be isomorphic?

Yes, all orientation preserving rigid motions can be isomorphic. This is because isomorphism preserves the orientation and shape of figures, so any two figures that have the same orientation and shape can be considered isomorphic. However, not all figures are isomorphic, as some may have different orientations or shapes that cannot be mapped onto each other without changing their properties.

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