线汇;
After congruence of lines changes into vector bundles, its correctness is proved, and theorem of Backlund is proved by using sections of bundles. A condition of iteration is given for seeking minimal area of a curved surface with fixed boundary curve.
将线汇转化成向量丛后从理论上证明了这种转化的正确性,利用向量丛的截面理论证明了Backlund定理并给出一种固定边界而求面积最小的曲面的迭代条件。
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