Show Explicit Bijection Between Sets (0,1)

In summary, the conversation discusses the process of showing an explicit bijection between sets. It is suggested that one can do so by writing down a function, with an example provided for finite sets. The possibility of a bijection between (0, 1) and another set is also mentioned, with the reminder that a bijection must always be between two sets.
  • #1
jihyel
3
0
How can I show an explicit bijection between sets?
anyidea?
how about with (0,1)?
 
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  • #2
You just write down a function. Do you know what the definition bijection is?

For example, if you want to show a bijection between A = {0, 1, 2, 3, 4} and B = {8, 9, 10, 11, 12} you could write
[tex]f: A \to B, f(a) = a + 8[/tex]
(for finite sets, you can also write it out as: define f by f(0) = 8, f(1) = 9, ..., f(4) = 12).

how about with (0,1)?
How about it? If you mean: how about a bijection, you are asking half a question. A bijection is always between two sets. "How about a bijection from (0, 1) to (3, 4)", or "from (0, 1) to (0, 1)", or "between (0, 1) and (-2, 2)" would make sense.
 
  • #3
Compuchip is correct. Think over it.
 

Related to Show Explicit Bijection Between Sets (0,1)

What is a bijection between sets?

A bijection between sets is a mathematical function that maps each element of one set to a unique element in another set, and vice versa. This means that every element in the first set has a corresponding element in the second set, and there are no duplicate mappings.

What does it mean for a bijection to be explicit?

An explicit bijection is a function that has a clear and specific formula or method for mapping elements between sets. This means that the mapping process is fully defined and can be easily understood and followed.

How is an explicit bijection shown between sets (0,1)?

To show an explicit bijection between sets (0,1), we must provide a clear and specific formula or method for mapping elements from the interval (0,1) to another set, such as the natural numbers or the real numbers. This can be done by defining a function that maps each element in (0,1) to a unique element in the other set, and vice versa, without any overlap or gaps in the mapping.

What are some examples of explicit bijections between sets (0,1)?

One example of an explicit bijection between sets (0,1) is the function f(x) = 1/x, which maps each element in (0,1) to its reciprocal in the set of positive real numbers. Another example is the function g(x) = tan(x), which maps each element in (0,1) to its tangent in the set of real numbers.

Why is it important to show an explicit bijection between sets (0,1)?

Showing an explicit bijection between sets (0,1) is important because it allows us to establish a one-to-one correspondence between elements in these sets. This can be useful in many mathematical and scientific applications, such as in proving the equivalence of different mathematical structures or in solving problems involving these sets. It also helps to deepen our understanding of the relationships between sets and their elements.

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