@overfullrule=0pt
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この章では,
tigers ox server ox_sm1_tigers
にたいするインタフェース函数を説明する.
1.0.1 tigers.tigers |
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tigers.tigers
:: この函数は識別子 p の tigers サーバに 行列 a に付随したトーリックイデアルのすべてのグレブナ基底を 計算してくれるようにたのむ.
リスト
数
リスト
[395] A=[[1,1,1,1],[0,1,2,3]]$ [306] S=tigers.tigers(A)$ [307] length(S); 8 [308] S[0]; [[[1,0,1,0],[0,2,0,0]],[[1,0,0,1],[0,1,1,0]],[[0,1,0,1],[0,0,2,0]]] [309] S[1]; [[[1,0,0,1],[0,1,1,0]],[[0,2,0,0],[1,0,1,0]],[[0,1,0,1],[0,0,2,0]]]
この例では, A に付随したアフィントーリックイデアルの
すべてのグレブナ基底が S に格納される.
この例では, 8 個のグレブナ基底がある.
[[i_1, i_2, ...],[j_1, j_2, ...]] は二つのモノミアルの
exponent をならべたものであり, 2 項式をあらわす.
たとえば,
S[0] は次の多項式の集合
x1 x3 - x2^2, x1 x4 - x2 x3, x2 x4 - x3^2
であり,
<x1 x3, x1 x4, x2 x4> がその initial ideal である.
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