The theory of the solution of partial differential equations remained to be fashioned . 偏微分方程解的理论还有待于形成。
The underlying method is based on the simple wave solutions of a system of hyperbolic partial differential equations . 基本的方法是以双曲型偏微分方程组的简单波解为根据的。
The subject of partial differential equations, which had its beginnings in the eighteenth century, burgeoned in the nineteenth . 诞生于十八世纪的偏微分方程这门学科,在十九世纪发展起来了。
They conclude their paper by showing how some partial differential equations and physical law can be expressed in tensor form . 他们在文章的末尾指出了如何把某些偏微分方程及物理规律表示成张量的形式。
An element is lumped if its terminal relation is an ordinary differential equation as opposed to a partial differential equation . 如果一个元素的端子关系是一个常微分方程,其反面为一个偏微方程,则它是集总的。