@overfullrule=0pt

plucker マニュアル

1. Plucker 関係式

1.0.1 plucker

1.0.2 plucker_relation

plucker_relation(L,M)

:: Index 集合 L, M に対応する Plucker 関係式を戻す.

return

quote

L

リスト

M

リスト

• L には, Plucker 関係式の を, M には, Plucker 関係式の を与える.

[297] A = plucker_relation([1,2],[3,4,5,6]);
quote(y_1_2_3*y_4_5_6-y_1_2_4*y_3_5_6+y_1_2_5*y_3_4_6-y_1_2_6*y_3_4_5)
[298] eval_str(print_terminal_form(A));
y_4_5_6*y_1_2_3-y_3_5_6*y_1_2_4+y_3_4_6*y_1_2_5-y_3_4_5*y_1_2_6

1.0.3 plucker_y

plucker_y(L)

:: Index 集合 L に対応する変数を戻す.

return

変数

L

リスト

• Index 集合 L は小さい順にソートされる. このとき符号もともに計算される.

[297] plucker_y([1,2,3]);
y_1_2_3

[298] plucker_y([2,1,3]);
-y_1_2_3

1.0.4 plucker_index

plucker_index(V)

: It gets the index of the variable V.

Example:

 plucker_index(plucker_y([1,2,3]));

Index

Table of Contents

Short Table of Contents

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