|
Master Member
|
牟宗三先生《邏輯典範》 對於羅素的批評 - 政大哲學學報 - 政治大學
11/40截圖:
註解20:事實上,皮氏是以1作為(自然)數的開始,他的第一條公理是「1是一個數」。
不過,羅素版本的皮氏體系中,數由0開始,所以第一條公理是「0是一個數」。
---
英文資料:
https://www.sciencedirect.com/topic...ics/peano-axiom
擷文,圖放不下
“Peano axioms” can be found today in numerous textbooks in a form similar to our list in Section 9.2. But the original Peano axioms were quite different. First of all, the notion of a natural number (a member of the set ℕ was taken as a primitive, and there were explicit axioms stating that zero and its successors are natural numbers. Also Peano used a language richer than first-order logic. There was a single induction axiom, involving quantification over sets, and there were no axioms for addition and multiplication (Example 12.2.2(iv) explains why). Peano’s system can thus be more adequately represented in second-order logic (see Chapters 11 and 12). A minor difference is that his numbers began with 1, not 0.
簡言之,諸君現在查得到的網頁,都是經過羅素理論的"修正版",並不是"原版"
我相信牟宗三先生。
__________________
簽名檔真是礙眼…還是讓版面乾淨點吧!
|