En matemática, una función homogénea es una función que presenta un comportamiento multiplicativo de escala interesante: si todos los argumentos se multiplican por un factor constante, entonces el valor de la función resulta ser un cierto número de veces el factor multiplicativo elevado a una potencia. Dicha potencia es el grado de la función homogénea (ver ).

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In mathematics, a homogeneous function is a function which satisfies the condition , for some integer . It can also be described as a function with multiplicative scaling behaviour: if the argument is multiplied by a factor, then the result is multiplied by some power of this factor. More precisely, if ƒ : V → W is a function between two vector spaces over a field F, and k is an integer, then ƒ is said to be homogeneous of degree k if for all nonzero α ∈ F and v ∈ V. This implies it has scale invariance. When the vector spaces involved are over the real numbers, a slightly less general form of homogeneity is often used, requiring only that () hold for all α > 0. Homogeneous functions can also be defined for vector spaces with the origin deleted, a fact that is used in the definition of sheaves on projective space in algebraic geometry. More generally, if S ⊂ V is any subset that is invariant under scalar multiplication by elements of the field (a "cone"), then a homogeneous function from S to W can still be defined by ().

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