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https://mathlog.info/articles/gZIAjg3NYuY3HzADwIYS
https://mathlog.info/articles/gZIAjg3NYuY3HzADwIYS
https://mathlog.info/articles/3652
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N=4(=2^2)ã®å Žåã¯GF(4)(=GF(2^2))äžã®ã¢ãã£ã³å¹³é¢ã«ã€ããŠããç§ã®åå¿é² > ã«ãŒã¯ãã³ã®çµåããã®äžã«ãã£ããã«ãŒã¯ãã³å¥³åŠç麻é倧äŒãïŒå¹³æïŒïŒå¹ŽïŒæïŒæ¥ä»ãïŒã®16人ã®å¥³åŠçã®å Žåã®(v,b,r,k,λ)=(16,20,5,4,1)ã®ãããã¯ãã¶ã€ã³ã«ãããŠèšèŒãããŠããããã«ã
(0,0) (1,0) (a,0) (b,0)
(0,1) (1,1) (a,1) (b,1)
(0,a) (1,a) (a,a) (b,a)
(0,b) (1,b) (a,b) (b,b)
ã®16åã®ç¹ãå«ã¿ãŸããããã§ãa^2+a+1=0,b=a+1ã§ãã
N=4ã®å Žåã®å°åœ±å¹³é¢ã§ãããæéäœGF(4)äžã®3次å
ã®å次座æšã(x,y,z)ãšãããšãzâ 0ã®å Žåã¯ãå°åœ±é¢ä¿ã«ããæéäœGF(4)äžã®2次å
ã®ã¢ãã£ã³åº§æš(x/z,y/z)ãšå¯Ÿå¿ããŠã16åã®ç¹ãããªããz=0ã®å Žåã¯ç¡éé ç¹ã§ã(kx,ky,0)(k=1,a,b)ãåäžèŠãããšã(1,0,0),(0,1,0),(1,1,0),(1,a,0),(a,1,0)ã®5åã®ç¹ãããªãã®ã§ãåèšãããš21(=4^2+4+1)åã®ç¹ããæããŸãã
zâ 0ã®å Žåã¯(kx,ky,kz)(k=1,a,b)ãåäžèŠããã®ã§ã(x,y,1)ã§ä»£è¡šããŠã以äžã®ããã«1ïœ16ã®çªå·ãã€ããŸãã
1:(0,0,1) 2:(1,0,1) 3:(a,0,1) 4:(b,0,1)
5:(0,1,1) 6:(1,1,1) 7:(a,1,1) 8:(b,1,1)
9:(0,a,1) 10:(1,a,1) 11:(a,a,1) 12:(b,a,1)
13:(0,b,1) 14:(1,b,1) 15:(a,b,1) 16:(b,b,1)
ãããŠãæ®ãã®5åã®ç¡éé ç¹ã«ã€ããŠã¯ã1-2-3-4ãçµã¶ãçŽç·ãã®å»¶é·äžã®ç¡éé ç¹ã«17ãšããçªå·ãã€ãã以äžã1-5-9-13,1-6-11-16,1-8-10-15,1-7-12-14ãçµã¶ãçŽç·ãã®å»¶é·äžã®ç¡éé ç¹ã«é 次18,19,20,21ãšçªå·ãã€ããŠãããŸãã
1:(0,0,1)- 2:(1,0,1)- 3:(a,0,1)- 4:(b,0,1)-17:(1,0,0)
1:(0,0,1)- 5:(0,1,1)- 9:(0,a,1)-13:(0,b,1)-18:(0,1,0)
1:(0,0,1)- 6:(1,1,1)-11:(a,a,1)-16:(b,b,1)-19:(1,1,0)
1:(0,0,1)- 8:(b,1,1)-10:(1,a,1)-15:(a,b,1)-20:(1,a,0)
1:(0,0,1)- 7:(a,1,1)-12:(b,a,1)-14:(1,b,1)-21:(1,b,0)
ããã®å°åœ±å¹³é¢äžã®ãçŽç·ãã¯ä»¥äžã®21æ¬ãšãªããŸãã
1-2-3-4-17,5-6-7-8-17,9-10-11-12-17,13-14-15-16-17,
1-5-9-13-18,2-6-10-14-18,3-7-11-15-18,4-8-12-16-18,
1-6-11-16-19,2-5-12-15-19,3-9-8-14-19,4-7-10-13-19,
1-8-10-15-20,2-7-9-16-20,3-6-12-13-20,4-5-11-14-20,
1-7-12-14-21,2-8-11-13-21,3-5-10-16-21,4-6-9-15-21,
17-18-19-20-21
21æ¬ã®ãçŽç·ãäžã«ã¯ãããã5ç¹ãä¹ã£ãŠããããçç·šæãã«ã€ããŠã®å¹³æïŒïŒå¹ŽïŒæïŒïŒæ¥ä»ãã§ã®ïŒ§ïŒ¡ïŒ©ããããã®ã³ã¡ã³ãã§ããå
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GF(3)äžã®3次å
å°åœ±ç©ºéã®ãããã¯ãã¶ã€ã³ã«ã€ããŠã¯ããç§ã®åå¿é² > ã«ãŒã¯ãã³ã®çµåããã®äžã«ãã£ããã«ãŒã¯ãã³å¥³åŠç麻é倧äŒãïŒå¹³æïŒïŒå¹ŽïŒæïŒæ¥ä»ãïŒã®40人ã®å¥³åŠçã®å Žåã®(v,b,r,k,λ)=(40,130,13,4,1)ã®å Žåã«çžåœããŸãã
æéäœGF(3)äžã®4次å
ã®å次座æšã(x,y,z,w)ãšãããšãwâ 0ã®å Žåã¯ãå°åœ±é¢ä¿ã«ããæéäœGF(3)äžã®3次å
ã®ã¢ãã£ã³åº§æš(x/w,y/w,z/w)ãšå¯Ÿå¿ããŠã27åã®ç¹ãããªããw=0ã®å Žåã¯ç¡éé ç¹ã§ã(x,y,z,0)ãš(2x,2y,2z,0)ãåäžèŠããŠ13åã®ç¹ãããªãã®ã§ãåèšãããš40(=3^3+3^2+3+1)åã®ç¹ããæããŸãã
wâ 0ã®å Žåã¯(kx,ky,kz,kw)(k=1,2)ãåäžèŠããã®ã§ã(x,y,z,1)ã§ä»£è¡šããŠã以äžã®ããã«1ïœ27ã®çªå·ãã€ããŸãã
1:(0,0,0,1) 2:(1,0,0,1) 3:(2,0,0,1)
4:(0,1,0,1) 5:(1,1,0,1) 6:(2,1,0,1)
7:(0,2,0,1) 8:(1,2,0,1) 9:(2,2,0,1)
10:(0,0,1,1) 11:(1,0,1,1) 12:(2,0,1,1)
13:(0,1,1,1) 14:(1,1,1,1) 15:(2,1,1,1)
16:(0,2,1,1) 17:(1,2,1,1) 18:(2,2,1,1)
19:(0,0,2,1) 20:(1,0,2,1) 21:(2,0,2,1)
22:(0,1,2,1) 23:(1,1,2,1) 24:(2,1,2,1)
25:(0,2,2,1) 26:(1,2,2,1) 27:(2,2,2,1)
æ®ãã®13åã®ç¡éé ç¹ã«ã€ããŠä»¥äžã®ããã«28ïœ40ã®çªå·ãã€ããŸãã1-10-19ãçµã¶çŽç·ã®å»¶é·äžã®ç¡éé ç¹ã«28ãšããçªå·ãã€ãã以äžã1-11-21,1-12-20,âŠã®çŽç·ã®å»¶é·äžã®ç¡éé ç¹ã«é 次29,30,âŠãšçªå·ãã€ããŠãããŸãã
1:(0,0,0,1)-10:(0,0,1,1)-19:(0,0,2,1)-28:(0,0,1,0)
1:(0,0,0,1)-11:(1,0,1,1)-21:(2,0,2,1)-29:(1,0,1,0)
1:(0,0,0,1)-12:(2,0,1,1)-20:(1,0,2,1)-30:(2,0,1,0)
1:(0,0,0,1)-13:(0,1,1,1)-25:(0,2,2,1)-31:(0,1,1,0)
1:(0,0,0,1)-14:(1,1,1,1)-27:(2,2,2,1)-32:(1,1,1,0)
1:(0,0,0,1)-15:(2,1,1,1)-26:(1,2,2,1)-33:(2,1,1,0)
1:(0,0,0,1)-16:(0,2,1,1)-22:(0,1,2,1)-34:(0,2,1,0)
1:(0,0,0,1)-17:(1,2,1,1)-24:(2,1,2,1)-35:(1,2,1,0)
1:(0,0,0,1)-18:(2,2,1,1)-23:(1,1,2,1)-36:(2,2,1,0)
1:(0,0,0,1)- 2:(1,0,0,1)- 3:(2,0,0,1)-37:(1,0,0,0)
1:(0,0,0,1)- 4:(0,1,0,1)- 7:(0,2,0,1)-38:(0,1,0,0)
1:(0,0,0,1)- 5:(1,1,0,1)- 9:(2,2,0,1)-39:(1,1,0,0)
1:(0,0,0,1)- 6:(2,1,0,1)- 8:(1,2,0,1)-40:(2,1,0,0)
ç¡éé ç¹28ã«ã¯ãçŽç·1-10-19,2-11-20,3-12-21,4-13-22,5-14-23,6-15-24,7-16-25,8-17-26,9-18-27ã®9æ¬ã®çŽç·ãéããåæ§ã«ç¡éé ç¹29ïœ40ã«ã€ããŠãã¢ãã£ã³ç©ºéäžã®ç¹ãã9æ¬ãã€ã®çŽç·ãéãã®ã§ããŸãã13Ã9ïŒ117æ¬ã®çŽç·ãå«ãŸããŸããããã«å ããŠãç¡éé ç¹ãçžäºã«çµã¶ä»¥äžã®13æ¬ã®çŽç·ãè¿œå ãããã®ã§ãåèš130æ¬ã®çŽç·ãå«ãŸããŸãã
37-38-39-40,28-29-30-37,28-31-34-38,
28-32-36-39,31-32-33-37,29-32-35-38,
34-35-36-37,30-33-36-38,28-33-35-40,
30-32-34-40,29-33-34-39,30-31-35-39,29-31-36-40
ãã®ããã«ããŠã€ãã£ãæéäœGF(3)äžã®3次å
å°åœ±ç©ºéã¯ã40åã®ç¹ãš130æ¬ã®çŽç·ãå«ãã§ããŠã(40,4,1)-ãã¶ã€ã³ãšãªããä»»æã®ç°ãªã2åã®ç¹ã«å¯Ÿãããã®2åã®ç¹ãå
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ã¯ã¡ããã©1åã§ãããšããæ¡ä»¶ãæºããã®ã§ã2-(40,4,1)-ãã¶ã€ã³ãšãªããŸãã
130æ¬ã®çŽç·ã10æ¬ã®çŽç·ãããªã13çµã®å¹³è¡é¡ãžåé¡ãããã¿ãŒã³ããã40人ã®å¥³ååŠçã®10åãžã®13æ¥éã®çµã¿åãã®ãã¿ãŒã³ãåŸãããã®ã§ãMagma Free Online Calculatorã®åãåããŠæ±ãããšãäžäŸãšããŠã
1æ¥ç®
{1,2,3,37},{10,14,18,39},{21,23,25,40},{4,13,22,28},{8,16,27,30},{9,12,24,31},{6,17,19,33},{5,11,26,34},{7,15,20,36},{29,32,35,38}
2æ¥ç®
{16,17,18,37},{19,22,25,38},{1,6,8,40},{5,14,23,28},{3,10,20,29},{7,11,24,32},{2,13,27,33},{9,15,21,34},{4,12,26,36},{30,31,35,39}
3æ¥ç®
{7,8,9,37},{20,23,26,38},{10,15,17,40},{2,12,19,29},{6,14,22,30},{1,13,25,31},{5,16,21,33},{3,18,24,34},{4,11,27,35},{28,32,36,39}
4æ¥ç®
{19,20,21,37},{3,4,8,39},{12,14,16,40},{6,13,23,29},{7,18,26,30},{2,15,25,32},{9,11,22,33},{1,17,24,35},{5,10,27,36},{28,31,34,38}
5æ¥ç®
{12,15,18,38},{19,23,27,39},{2,4,9,40},{8,17,26,28},{1,11,21,29},{5,13,24,30},{7,10,22,31},{6,16,20,32},{3,14,25,33},{34,35,36,37}
6æ¥ç®
{1,10,19,28},{5,15,22,29},{9,17,25,30},{8,11,23,31},{3,13,26,32},{4,18,20,33},{6,12,27,34},{7,14,21,35},{2,16,24,36},{37,38,39,40}
7æ¥ç®
{22,23,24,37},{11,14,17,38},{2,6,7,39},{9,16,26,29},{1,12,20,30},{3,15,27,31},{5,18,19,32},{4,10,25,34},{8,13,21,36},{28,33,35,40}
8æ¥ç®
{10,11,12,37},{21,22,26,39},{3,5,7,40},{6,15,24,28},{8,18,25,29},{4,16,19,31},{1,14,27,32},{2,17,23,34},{9,13,20,35},{30,33,36,38}
9æ¥ç®
{2,5,8,38},{20,24,25,39},{11,13,18,40},{3,12,21,28},{7,17,27,29},{4,15,23,30},{1,16,22,34},{6,10,26,35},{9,14,19,36},{31,32,33,37}
10æ¥ç®
{25,26,27,37},{10,13,16,38},{1,5,9,39},{2,11,20,28},{4,14,24,29},{6,18,21,31},{7,12,23,33},{8,15,19,35},{3,17,22,36},{30,32,34,40}
11æ¥ç®
{3,6,9,38},{11,15,16,39},{20,22,27,40},{2,14,26,31},{4,17,21,32},{8,10,24,33},{7,13,19,34},{5,12,25,35},{1,18,23,36},{28,29,30,37}
12æ¥ç®
{4,5,6,37},{21,24,27,38},{12,13,17,39},{7,16,25,28},{3,11,19,30},{9,10,23,32},{1,15,26,33},{8,14,20,34},{2,18,22,35},{29,31,36,40}
13æ¥ç®
{13,14,15,37},{1,4,7,38},{19,24,26,40},{9,18,27,28},{2,10,21,30},{5,17,20,31},{8,12,22,32},{3,16,23,35},{6,11,25,36},{29,33,34,39}
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