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No.

For example, y = 7 is monotonic. It may be a degenerate case, but that does not disallow it. It is not a bijection unless the domain and range are sets with cardinality 1.

Even a function that is strictly monotonic need not be a bijection. For example, y = sqrt(x) is strictly monotonic [increasing] for all non-negative x. But it is not a bijection from the set of real numbers to the set of real numbers because it is not defined for negative x.

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Q: Is a monotonic function a bijection?
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Related questions

Is every bijection a strictly monotonic function?

No. For example, consider the discontinuous bijection that increases linearly from [0,0] to [1,1], decreases linearly from (1,2) to (2,1), increases linearly from [2,2] to [3,3], decreases linearly from (3,4) to (4,3), etc.


Does the greatest integer function have an inverse function?

Inverse of a function exists only if it is a Bijection. Bijection=Injection(one to one)+surjection (onto) function.


What is bijection?

A bijection is a one-to-one correspondence in set theory - a function which is both a surjection and an injection.


What is a bijection?

A bijection is a one-to-one correspondence in set theory - a function which is both a surjection and an injection.


When does a relation be a function?

A function is a relation whose mapping is a bijection.


What is a type of function whose graph is a nonvertical line?

A monotonic, or one-to-one function.


Monotonic transformation of utility function?

that's not really a question?


What is the correspondence of the domain and range of a linear function?

It is a bijection [one-to-one and onto].


What is the difference between relations and functions?

A function is a relation whose mapping is a bijection.


Is a strictly monotonic function absolutely continuous?

No, they can only be jump continuous.


What are some adjectives for the math term function?

Here are some: odd, even; periodic, aperiodic; algebraic, rational, trigonometric, exponential, logarithmic, inverse; monotonic, monotonic increasing, monotonic decreasing, real, complex; discontinuous, discrete, continuous, differentiable; circular, hyperbolic; invertible.


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Domain, codomain, range, surjective, bijective, invertible, monotonic, continuous, differentiable.