Starting with Lagrange equations of the first kind, pure differential equations of multibody systems with rheonomic constraints are established.
根据程与约束程显含时间等价性,提出了定常约束与定常统判据等同表述。
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In fact, the problem with relativity wasn't that it involved a lot of differential equations, Lorentz transformations, and other complicated mathematics (though it did-even Einstein needed help with some of it), but that it was just so thoroughly nonintuitive.
实际上,相对论的问题并不在于它涉及许多微分方程、洛伦兹变换和其他复杂的数(虽然它确实涉及——有的方面连爱因斯坦也需要别人帮忙),而是在于它不是凭直觉所能完全搞懂的。