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D.15.1.1 poshull
Procedure from libraryarnold.lib (see arnold_lib).
- Usage:
- poshull(L); L list
- Return:
- the cone generated by the integer vectors in L
LIB "arnold.lib"; ring R=0,(x,y),ds; intvec v1 = 1,1; intvec v2=1,2; def c = poshull(list(v1,v2)); c; ==> AMBIENT_DIM ==> 2 ==> FACETS ==> -1, 1, ==> 2,-1 ==> LINEAR_SPAN ==> ==> |