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## 金剛大義

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[義理，言說者也，固然因言說而成語句，而后，人人以之相交流、可傳授，亦必因言說而起壁障，奈何言說終非實地 ，故有古今知行非一之長慨。金剛一經，非假言說以通實地不可，其竅妙在乎吾人究極何以由言說通實地，故佛不煩重詞，言說反復，欲窮詞力以求洞穿知言與乎實體之壁障。]

## 数学是什么？

what is mathematics?

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The Detail of This Chapter.pdf

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the first event: 1, 2, 3,...

then, we know that counting means +1

the first principle: no more, nor less.
addition, subtraction, multiplication, division

subtraction lead to 0 and negatives

division lead to fraction

the closeness of operation=>the set of number: natural number, integral number, rational number.

infinity.

【complete induction】

how to denote number? base and power

how to solve algebraic equation?

the complete of order=>real number set

the second principle: completeness
any two elements of set R, a>b, or b>a,

## 陰符.截直陰符 