- #1
Bipolarity
- 776
- 2
Let's say we have a point-normal representation of a space:
[tex] n \cdot P_{0}P = 0 [/tex] where n is a vector [itex]<a_{1},a_{2}...a_{n}>[/itex] and [itex]P_{0}[/itex] is a point through which the space passes and P is the set of all points contained in the space.
In [itex]ℝ^{2}[/itex], the point-normal representation defines a line.
In [itex]ℝ^{3}[/itex], the point-normal representation defines a plane.
In [itex]ℝ^{n}[/itex], the point-normal representation defines a hyperplane, or (n-1) dimensional affine space.
It can be shown that this affine space can be represented in component form as:
[tex] a_{1}x_{1} + a_{2}x_{2} + ... + a_{n}x_{n} = b [/tex]
where b is a constant.
My question is essentially asking about the converse of the representation done above: Can we go from the component-wise representation to the point-normal representation?
In other words, can we show that the only vectors normal to the space determined by [tex] a_{1}x_{1} + a_{2}x_{2} + ... + a_{n}x_{n} = b [/tex] are vectors of the form
[itex]t<a_{1},a_{2}...a_{n}>[/itex] where t is a scalar parameter?
BiP
[tex] n \cdot P_{0}P = 0 [/tex] where n is a vector [itex]<a_{1},a_{2}...a_{n}>[/itex] and [itex]P_{0}[/itex] is a point through which the space passes and P is the set of all points contained in the space.
In [itex]ℝ^{2}[/itex], the point-normal representation defines a line.
In [itex]ℝ^{3}[/itex], the point-normal representation defines a plane.
In [itex]ℝ^{n}[/itex], the point-normal representation defines a hyperplane, or (n-1) dimensional affine space.
It can be shown that this affine space can be represented in component form as:
[tex] a_{1}x_{1} + a_{2}x_{2} + ... + a_{n}x_{n} = b [/tex]
where b is a constant.
My question is essentially asking about the converse of the representation done above: Can we go from the component-wise representation to the point-normal representation?
In other words, can we show that the only vectors normal to the space determined by [tex] a_{1}x_{1} + a_{2}x_{2} + ... + a_{n}x_{n} = b [/tex] are vectors of the form
[itex]t<a_{1},a_{2}...a_{n}>[/itex] where t is a scalar parameter?
BiP