Can one define a function that sends lets say a line in r2 to a volume in r3?

In summary, the conversation discusses the possibility of defining a function that maps from R^2 to R^n using space-filling curves. The question is raised about whether this function can be bijective or continuous, and it is clarified that it can only be one or the other but not both. The conversation also touches on the concept of a bijection between compact and Hausdorff spaces, and the potential implications of considering a line segment instead of the entire real number line. A link is provided for further reading on the topic of invariance of domain.
  • #1
Kidphysics
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Or perhaps there is a more general function that sends to the next hypervolume? Can it be bijective? Continuous?
 
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  • #3
Ah ^thanks, so by this logic we can define H(x,y)--> (h(x),h(y),h(yx),h(xy),h(xx),h(yy)...)?

thus we can go from R^2-->R^n?
 
  • #4
it can either be bijective or be continuous but not both, I think.
 
  • #5
mathwonk said:
it can either be bijective or be continuous but not both, I think.

Maybe you're referring to mapping a (closed) line segment? In that case, you would have a bijection between compact and Hausdorff, which is a homeomorphism?

To the OP: I'm curious: why are you considering a line embedded in ℝ2, instead of considering ℝ itself?
 

FAQ: Can one define a function that sends lets say a line in r2 to a volume in r3?

Can you explain the concept of a function that maps a line in R2 to a volume in R3?

Yes, this concept is known as a parametric function. It involves using one or more parameters to represent the coordinates of points on a line in R2. These parameters are then used to calculate the coordinates of points on a volume in R3, creating a one-to-one mapping between the two.

How is this type of function different from a regular function in mathematics?

Parametric functions are different from regular functions in that they require the use of parameters to define the input and output values. In contrast, regular functions can be defined using a single variable and the output is dependent solely on the input.

Is it possible to create a function that maps a line in R2 to a volume in R3 without using parameters?

No, it is not possible to create a function that maps a line in R2 to a volume in R3 without using parameters. This is because the mapping requires the use of multiple variables to represent the coordinates of points in both R2 and R3.

What are some real-world applications of a function that maps a line in R2 to a volume in R3?

Parametric functions have various real-world applications, such as in computer graphics for creating three-dimensional objects, in physics for modeling the motion of objects in space, and in engineering for designing complex structures.

Are there any limitations or constraints to consider when defining a function that maps a line in R2 to a volume in R3?

Yes, there are some limitations and constraints to consider when defining such a function. One important consideration is ensuring that the mapping is one-to-one and onto, meaning that each point on the line in R2 is mapped to a unique point in the volume in R3 and vice versa. Additionally, the function should be continuous and differentiable to ensure smooth and accurate mapping between the two spaces.

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