setmod_ff

setmod_ff([prime|poly])

:: Í­¸ÂÂΤÎÀßÄê, ÀßÄꤵ¤ì¤Æ¤¤¤ëÍ­¸ÂÂΤÎË¡, ÄêµÁ¿¹à¼°¤Îɽ¼¨

return

¿ô¤Þ¤¿¤Ï¿¹à¼°

prime

ÁÇ¿ô

poly

GF(2) ¾å´ûÌó¤Ê 1 ÊÑ¿ô¿¹à¼°

• °ú¿ô¤¬ÀµÀ°¿ô prime ¤Î»þ, GF(prime) ¤ò´ðÁÃÂΤȤ·¤ÆÀßÄꤹ¤ë.
• °ú¿ô¤¬Â¿¹à¼° poly ¤Î»þ, GF(2^deg(poly mod 2)) = GF(2)[t]/(poly(t) mod 2) ¤ò´ðÁÃÂΤȤ·¤ÆÀßÄꤹ¤ë.
• ̵°ú¿ô¤Î»þ, ÀßÄꤵ¤ì¤Æ¤¤¤ë´ðÁÃÂΤ¬ GF(prime) ¤Î¾ì¹ç prime, GF(2^n) ¤Î¾ì¹çÄêµÁ¿¹à¼°¤òÊÖ¤¹.
• GF(2^n) ¤ÎÄêµÁ¿¹à¼°¤Ï, GF(2) ¾å n ¼¡´ûÌó¤Ê¤é¤Ê¤ó¤Ç¤âÎɤ¤¤¬, ¸úΨ¤Ë ±Æ¶Á¤¹¤ë¤¿¤á, defpoly_mod2() ¤ÇÀ¸À®¤¹¤ë¤Î¤¬¤è¤¤.

[174] defpoly_mod2(100);
x^100+x^15+1
[175] setmod_ff(@@);
x^100+x^15+1
[176] setmod_ff();
x^100+x^15+1

»²¾È

section defpoly_mod2

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