the theory of the solution of partial differential equations remained to be fashioned . 偏微分方程解的理論還有待于形成。
the underlying method is based on the simple wave solutions of a system of hyperbolic partial differential equations . 基本的方法是以雙曲型偏微分方程組的簡(jiǎn)單波解為根據(jù)的。
they conclude their paper by showing how some partial differential equations and physical law can be expressed in tensor form . 他們?cè)谖恼碌哪┪仓赋隽巳绾伟涯承┢⒎址匠碳拔锢硪?guī)律表示成張量的形式。
an element is lumped if its terminal relation is an ordinary differential equation as opposed to a partial differential equation . 如果一個(gè)元素的端子關(guān)系是一個(gè)常微分方程,其反面為一個(gè)偏微方程,則它是集總的。
semigroups and linear partial differential equations with delay 半群和線性時(shí)滯偏微分方程