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第四百一十章 勒贝格测度(测度论)(1 / 2)

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不可积分函数的问题出现多年,但让此刻的勒贝格陷入沉思。

明明那种函数是有一定面积的,为什么非说不可积分,但要去求也无法按照固有模式下手。

若尔当曾提醒:“为什么按照黎曼积分才叫最合理?难道没有其他形式的积分吗?”

勒贝格想:即使如老师所说,也不能直接突兀的找奇特形式的积分。就算是要找,那也需要对这种新的积分形式有一个好的解释。

这个解释就是,什么是真正的可积分的?

很多模型的问题在于,体积的单元和组成体的东西的方式多不严谨,探讨和计算之时,出现了很多不可思议的错误,这种矛盾上升到哲学层面,就是人类对点线面的认识不够深刻。

如果想要深刻,不能在测量的问题上产生矛盾。

勒贝格第一时间想到了等间距的点阵,数点的个数,总是不会有太大错。点又个数,没有体积,不会自我相交。点的个数在某种层面上,就是代表点阵的准确面积和体积。

无非就是知道长度之和,求长宽高直接相乘就可以了,如何一个可以测的,就是长度符合可以测量的标准,让长宽高相乘就可以了。

“是多少个点,就是多少个体积,就是笨办法来求,也指定不会错误。”

点阵在古代就是形数,曾解决毕达哥拉斯定理的证明。

此刻依然可以在看似不可积分的积分问题上能够发挥作用,发挥严谨解释的作用。

勒贝格笑了:“真正的体积和面积是由连绵不断的点组成的,哪里像我所说如此简单,弄个点阵呢?”

其实,只要让一个数学坐标中,符合点阵的一种数学模型存在就行,那种无限的点阵铺满坐标的形式,就是环。

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