Definition:Wronskian

Definition
Let $\map f x$ and $\map g x$ be real functions defined on a closed interval $\closedint a b$.

Let $f$ and $g$ be differentiable on $\closedint a b$.

The Wronskian of $f$ and $g$ is defined as:


 * $\map W {f, g} = \begin {vmatrix}

\map f x & \map g x \\ \map {f'} x & \map {g'} x \\ \end {vmatrix} = \map f x \, \map {g'} x - \map g x \, \map {f'} x$

Also known as
Some sources preserve the diacritic on the n, that is: Wrońskian, but many consider such refinements to be visual clutter and prefer to discard them.