目前,数学方法正以日益迅猛的速度和不断扩大的规模向经济学领域渗透。使经济学领域发生了一系列巨大的变化。即从说明现在到预测未来,从表现存在到深化影响,从定性研究到定量分析。比如:金融、财政、税收、成本、利润、投入、产出、贷 At present, mathematical methods are infiltrating into the field of economics at an increasingly rapid pace and in an ever-expanding scale. A series of great changes have taken place in the field of economics. That is, from the present to the future, from the existence of the existence to the deepening of the impact, from qualitative research to quantitative analysis. For example: finance, finance, taxation, cost, profit, input, output, loan