Introduction
   InetCAS
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     InetReduce
   InetApplication
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   Mathematics
     Combinatorics
       - numbpart
       - multipart
       - arithinva
       - rbf

1. rbf@trinitas.mju.ac.kr ÀÇ ¸ñÀû     [ English ]
ÇÑ°³ÀÇ Gaussian polynomialÀ» m ¹ø °öÇÑ ´ÙÇ×½Ä

(*)        (1+t+t^2+...+t^(q-1))^m

ÀÇ ¸ðµç °è¼ö¸¦ °è»êÇÏ¿© ±× °á°ú¸¦ ÀüÀÚ¸ÞÀÏ·Î º¸³» ÁÜ. 

2. ¼Ò°³
q*m ÀÌ Ä¿Áü¿¡ µû¶ó À§ÀÇ ¼ö½Ä (*) ÀÇ ¸ðµç °è¼ö¸¦ ±¸ÇÏ´Â °ÍÀÌ ¸Å¿ì ¾î·Á¿öÁø´Ù. ÃÖ±Ù¿¡ ¼Ò¼øÅ ±³¼ö´Â À§ ¼ö½ÄÀÇ °è¼ö¸¦ ¸Å¿ì È¿°úÀûÀ¸·Î °è»êÇÒ ¼ö ÀÖ´Â Á¡È­½Ä ÇüÅÂÀÇ °ø½ÄÀ» ¹ß°ßÇÏ¿´À¸¸ç, ÀÌ °ø½ÄÀ» Recursive Binomial Formula ¶ó°í ºÎ¸¥´Ù.

Soh's recursive binomial formula for (*)

ÀÌ °ø½ÄÀº q = 2 ÀÏ ¶§µµ, ³Î¸® ¾Ë·ÁÁø ¾Ë·ÁÁø Binomial Formula¿Í´Â ´Þ¸®, Ç×»ó Á¡È­½Ä ÇüÅÂÀÌ´Ù. ¿©±â¼­´Â ÀÌ °ø½ÄÀ» »ç¿ëÇÏ¿© À§ ¼ö½Ä (*)ÀÇ ´ÙÇ×½ÄÀÇ ¸ðµç °è¼ö¸¦ °è»êÇÑ´Ù. Recursive Binomial FormulaÀÇ time efficiency ´Â O(m^2) ·Î¼­ ¸Å¿ì È¿À²ÀûÀÌ´Ù. 

3. ±â¿©ÀÚ: ÇöÀç »ç¿ë ÁßÀÎ ÇÁ·Î±×·¥Àº ¸íÁö´ëÇб³ ¼öÇаú ¼Ò¼øÅ ±³¼ö°¡ Computer Algebra System (CAS) ÀÎ Reduce¸¦ »ç¿ëÇÏ¿© ±¸ÃàÇÏ¿´´Ù.  

4. Note
Á¢¼öµÈ ÀüÀÚ¸ÞÀÏÀ» ¿¡·¯¾øÀÌ Ã³¸®Çϱâ À§ÇÏ¿©, Microsoft »çÀÇ Outlook Express¿¡¼­ New mail > Alt+O > Alt+X (with No Encryption) À» »ç¿ëÇÏ¿© rbf@trinitas.mju.ac.kr ·Î ´ÙÀ½ÀÇ Á¦ 5Ç×ÀÇ ¼³¸í¿¡ µû¶ó ÀÛ¼ºÇÑ ÀüÀÚ¸ÞÀÏÀ» º¸³¾ °ÍÀ» Àû±Ø ±ÇÀåÇÑ´Ù.   

5. ÀüÀÚ¸ÞÀÏÀ» º¸³»´Â ¹æ¹ý: º»¹®ÀÌ, ¿¹¸¦ µé¾î, 

     input: 
         q:=12$
         m:=34$
     end input: 

À¸·Î ÀÌ·ç¾îÁø plain-text ¾ç½ÄÀÇ ÀüÀÚ¸ÞÀÏ (¿¹¸¦ µé¾î, Microsoft Outlook Express ÀÏ °æ¿ì¿¡´Â New mail > Alt+o > Alt+x (with No Encryption)) À» rbf@trinitas.mju.ac.kr ·Î º¸³½´Ù. ±×·¯¸é, ÀüÀÚ¸ÞÀÏÀÇ µµÂø Áï½Ã À§ ¼ö½Ä (*) ÀÇ ¸ðµç °è¼ö¸¦ °è»êÇÏ¿© ±× °á°ú¿Í º» ¼­¹ö¿¡¼­ Àüü °è»ê¿¡ ¼Ò¿äµÈ ½Ã°£(timex report)À» ´ãÀº ÀüÀÚ¸ÞÀÏÀ» ¼Û½ÅÀÚ¿¡°Ô Áï½Ã ¹ß¼ÛÇÔ.

[ÁÖÀÇ] º¹ÀâÇÏÁö ¾ÊÀº °è»êÀ» À§ ÀüÀÚ¸ÞÀÏ ÁÖ¼Ò·Î ÀÇ·ÚÇÏ¿´À» °æ¿ì¿¡´Â ´ë°³ 3 - 4 ºÐ À̳»¿¡ °á°ú¸¦ ¹Þ¾Æ º¼ ¼ö ÀÖ½À´Ï´Ù.  ±×·¯³ª, ÀÇ·ÚÇÑ °è»êÀ» ¼öÇàÇÑ ÈÄ ±× °è»ê°á°ú¸¦ ´ä½ÅÀ¸·Î¼­ ¼Û½ÅÀÚ¿¡°Ô º¸³» µå·ÈÀ¸³ª, (i) ¼Û½ÅÀÚÀÇ ÁÖ¼Ò°¡ Ʋ¸®°Å³ª (ii) ȤÀº ¼Û½ÅÀÚÀÇ ÀüÀÚ¸ÞÀÏ ÅëÀÌ ´Ù¸¥ ÀüÀÚ¸ÞÀÏ·Î °¡µæ Â÷ ÀÖ¾î, ¼Û½ÅÀÚ Ãø¿¡ Á¦´ë·Î Á¢¼ö°¡ µÇÁö ¾Ê°í µÇµ¹¾Æ ¿À´Â °æ¿ì°¡ °£È¤ ÀÖÀ¸´Ï, À§ÀÇ Á¦ 5Ç×ÀÇ ÀüÀÚ¸ÞÀÏ ÁÖ¼Ò·Î °è»êÀ» ÀÇ·ÚÇÑ ÈÄ ÀÏÁ¤½Ã°£ ÀÌ»ó ±â´Ù·Áµµ ´ä½ÅÀÌ ¾øÀ» °æ¿ì¿¡´Â, º»ÀÎÀÇ ¸ÞÀÏ°èÁ¤ÀÇ »óŸ¦ Á¡°ËÇÏ¿© À§ÀÇ (i) °ú (ii)ÀÇ ¹®Á¦¸¦ ÇØ°áÇÑ ÈÄ ´Ù½Ã ÇÑ ¹ø À§ÀÇ Á¦ 5Ç×°ú °°ÀÌ ÀüÀÚ¸ÞÀÏÀ» º¸³» ÁÖ½Ã¸é µÇ°Ú½À´Ï´Ù.

   

6. Examples
¾Æ·¡ÀÇ ¿¹Á¦¿¡¼­ "input:" °ú "end input:" »çÀÌ¿¡ ÀÖ´Â ´ÙÀ½ÀÇ inputÀ»  rbf@trinitas.mju.ac.kr ·Î ¸ÞÀÏ·Î º¸³»¸é, °è»ê°á°ú¸¦ °ð ¹Þ¾Æ º¼ ¼ö ÀÖ½À´Ï´Ù. ¾Æ·¡ÀÇ °¢ ¿¹Á¦µé¿¡ ´ëÇÑ ÀÚ¼¼ÇÑ °è»ê°á°ú¸¦ º¸°í ½ÍÀ¸¸é Áß°£Á¦¸ñÀ» Ŭ¸¯Çϼ¼¿ä.

6-1. Example 1 (Click here for the details)

     input:
     q:=101$
     m:=20$
     end input: 

output file size: 46KB 

comment The following is the timex report of the system for the above computation (in seconds):
real        1.10
user        0.95
sys         0.14
$

6-2. Example 2 (Click here for the details)

     input:
     q:=101$
     m:=40$
     end input:

output file size: 163KB 

comment The following is the timex report of the system for the above computation (in seconds):
real        3.42
user        3.12
sys         0.30

6-3. Example 3 (Click here for the details)

     input:
     q:=101$
     m:=80$
     end input:

output file size: 606KB

comment The following is the timex report of the system for the above computation (in seconds):
real       12.26
user       11.30
sys         0.88
$

6-4. Example 4 (Click here for the details)

      input:
     q:=101$
     m:=160$
     end input: 

output file size: 2.3MB 

comment The following is the timex report of the system for the above computation (in seconds):
real 45.00
user 42.77
sys 2.06
$¡¡

 
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