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Question on II-A

 
 
SongKevin的头像
Question on II-A
SongKevin - 2021年01月30日 Saturday 07:27
 

How would you write a bijection (7.25)?

 
ZhangCharles的头像
Re: Question on II-A
ZhangCharles - 2021年01月30日 Saturday 14:20
 

One-to-one, with every one of them used up.  (Hint: Look at 7.4b in lecture.)

 
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ProfessorAreteem的头像
Re: Question on II-A
ProfessorAreteem - 2021年02月1日 Monday 14:46
 
You need to associate each way to arrange the $n$ identical balls into the $k$ boxes to a solution of the equation $a_1 + \cdots + a_k = n$, and vice versa. 
 
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