· Finite elements有限元，第3版：理论、快速解法及在固体力学中的应用 · Elementary differential geometry基本微分几何 · Complex semisimple lie algebras复半单李代数 ..
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平面上等周问题是微分几何的基本问题之一。
The isoperimetric problem is one of the basic differential geometric problems.
接着，仿微分几何的曲线论，建立了基本公式和唯一存在定理。
Then the basic formulae and the theorem on its unique existence have been established as doing in the curve theory in Differential Geometry.
由微分几何基本公式导得圆弧曲线梁中预应力等代荷载的精确公式，预应力钢索在曲梁中竖弯与平弯均较平缓，此时公式可得以简化。
A precise formula for equivalent load of prestressing force in curved girder of arc form is derived from the fundamental formulae of differential geometry.
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