Who Invented Homogeneous Function?

A function homogeneous of some degree has a property sometimes used in economic theory that was first discovered by Leonhard Euler

Leonhard Euler
He introduced much of modern mathematical terminology and notation, including the notion of a mathematical function. He is also known for his work in mechanics, fluid dynamics, optics, astronomy and music theory. Euler is held to be one of the greatest mathematicians in history and the greatest of the 18th century.
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(1707–1783). x·∇f(x) = kf(x) for all x ∈ S. f(tx1, ..., txn) = tkf(x1, ..., xn) for all (x1, ..., xn) and all t > 0.

What makes a function homogeneous?

In mathematics, a homogeneous function is one with multiplicative scaling behaviour: if all its arguments are multiplied by a factor, then its value is multiplied by some power of this factor. and all real numbers. is called the degree of homogeneity.

Why do we need homogeneous functions?

A homogeneous function can be "decomposed" as f(x,y)=yn⋅f(xy,1)=yn⋅g(xy) at points y≠0, which can provide significant insights in many scenarios. Homogenous functions are helpful in proving inequalities.

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