第二十二章 拜师?(1 / 2)

汉旌 尚冠 1215 字 2022-05-22

眼见数日来邀请入汉为臣却屡屡被否决的赵婴,此时终于松了口,甚至还愿意用“假死”之计,樊建岂会坐视不理他的后顾之忧,于是主动承诺道:“不必忧虑此事,我自会将君卿兄在建邺的家小秘密接来成都。”

赵婴,不,现在应该叫赵爽了,他摸着胡须点了点头,然后没好气地说道:“现在能安排晚饭送来了吗?”

樊建笑了笑,自嘲道:“谁让君卿兄如此有诚意呢,罢了,明日卫弘的差事,我亲自替他补缺吧,至于晚食,龚袭你去安排吧。”

“喏。”令史董厥点头应下,便着手安排人送来饭食。

赵爽继续请教卫弘,不解“+”究竟是何意,卫弘拿起他丢落在地的毛笔,解释道:“这是加号,即加减乘除四法之一,这一横便是其中减号,至于乘和除以的符号则是这样写……”

赵爽点了点头,提出了自己的理解:“加法就是前后两数之和,减法就是做差,乘法是两数之积,这除法便是《九章算术》中说的‘所设分’。”

然后又对卫弘猜测道:“那这两横的符号,是不是等同的意思,我看这左右两列就是用化积之法算出最后的步骤。”

卫弘有些讶然于赵爽的接受能力,虽然这些都是小儿科的东西,但对于初次接受这种数学体系的赵爽来说,能够做到现在的理解已经算是当世的凤毛麟角了!

见到卫弘点了点头,赵爽在此指着那“X”号说道:“这应该是一位未知之数的符号,如此看来你是用方程法解的引葭赴岸,我能看懂其中一二,不过还有一点疑惑的地方。”

旋即,赵爽指着卫弘的解题步骤问道:“应该是我不清楚这些数字的计算规则,比如一左一右的对弧符号应该是囊括其内的数字优先计算的意思,但是这2为何要写的这般小,还在右上的位置,定然是有意为之,还请足下为我解惑。”

卫弘道:“这是一种新的概念应用,《九章算术》里叫做‘开方’。”

“开方?这我懂。”赵爽点了点头,继续沉浸在那道引葭赴岸的解题步骤里面。

见他深思,卫弘又将引葭赴岸的解答又写了一遍,比之前的步骤更为详细,毕竟前版只是随手而写的草稿。

赵爽接过那张解题步骤的白纸,再度仔细观看端详了起来,看到困惑不解的地方,自己还在掌心中写写画画,又是还抬起头看着房梁深思。

饭食已经送了过来,卫弘倒是不像赵爽那般,沉浸在数学的海洋中不可自拔,确实是肚子饿得前胸贴后背了,于是拿了一份饭食狼吞虎咽的起来。

“好啊!精彩!妙哉!”

突然,赵爽一声高喝,一连说出三个赞叹之词,却把众人吓了一大跳,连卫弘手中的筷子都抖落了一根。

回过味来的赵爽,大概是觉得自己失态了,平复了心中的惊奇之后,才笑声爽朗地对樊建说道:“这种新式算法,真的是……好的无话可说!长元啊,你可知道,这新式算法意味着什么?”

未待樊建有所回应,赵爽便站起身来对众人说道:“我欲用这种新式算法注释《周髀算经》和《九章算术》等先贤数科典籍,这种新式算法足以让晦涩难懂不知所云的数科经典,成为邻家稚子的启蒙读物!”

闻言,樊建与董厥等人皆是一脸的不可思议,他们明白能被赵爽看重的算法定然价值不菲,但若是这种新式算法能够将无数士子畏惧其难的数科典籍变成一部稚子读物,简直是天方夜谭!

要知道,《九章算术》乃是汉初丞相张苍主持编撰,其内容无比晦涩难懂,张苍也被戏称“一部九章治天下”。有史以来,能够读懂《九章算术》的人,无不是治国安邦的能吏。似汉武大帝那等穷兵黩武的帝王,支撑其雄才伟略得以实施的国力基础,便是精通《九章算术》的桑弘羊为其筑造的。

至于赵爽钻研大半生的天文历法,更是要穷尽无数计算,才能得到正确的结果,否则的话,他又岂会答应樊建入汉为臣呢?

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