It is only by assuming an infinitely small magnitude , and a progression rising from it up to a tenth , and taking the sum of that geometrical progression , that we can arrive at the solution of the problem 只有假设出无穷小数和由无穷小数产生的十分之一以下的级数，再求出这一几何级数的总量，我们才能得出问题的答案。
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Especially , the unknowns of the algebraic equations about 3 - dimensional problems increase as geometrical progression compared with 2 - dimensiond problems . so development of computers can not meet their needs 特别地，三维问题最终产生的代数方程组未知数的个数与二维问题相比，将按几何级数急剧增加，即使计算机技术飞速发展，也难以满足它们的需求。
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