The present note is
devoted to the discussion of a special class of transformations that preserves
the oscillatory or disconjugacy nature of solutions for a type of first order
differential system in a 2n-dimensional vector function, and which includes as
a particular instance a well-known transformation of a real scalar second
order homogeneous ordinary differential equation to the canonical form
y′′(t) + γ(t)y(t) = 0.