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D.13.2.45 fanViaCones
Procedure from library gfan.lib (see gfan_lib).
- Usage:
- fanViaCones(L); L list
fanViaCones(c1[,...,ck]); c1,...,ck cones
- Return:
- fan, creates a fan generated by the cones in L resp c1,...,ck
Example:
| | LIB "gfan.lib";
intmat M[2][2]=1,0,0,1;
cone c=coneViaPoints(M);
intmat N[2][2]=1,0,0,-1;
cone d=coneViaPoints(N);
fan f=fanViaCones(c,d);
f;
==> _application PolyhedralFan
==> _version 2.2
==> _type PolyhedralFan
==>
==> AMBIENT_DIM
==> 2
==>
==> DIM
==> 2
==>
==> LINEALITY_DIM
==> 0
==>
==> RAYS
==> 0 -1 # 0
==> 0 1 # 1
==> 1 0 # 2
==>
==> N_RAYS
==> 3
==>
==> LINEALITY_SPACE
==>
==> ORTH_LINEALITY_SPACE
==> -1 0 # 0
==> 0 -1 # 1
==>
==> F_VECTOR
==> 1 3 2
==>
==> SIMPLICIAL
==> 1
==>
==> PURE
==> 1
==>
==> CONES
==> {} # Dimension 0
==> {0} # Dimension 1
==> {1}
==> {2}
==> {0 2} # Dimension 2
==> {1 2}
==>
==> MAXIMAL_CONES
==> {0 2} # Dimension 2
==> {1 2}
==>
list L=c,d;
fan g=fanViaCones(L);
g;
==> _application PolyhedralFan
==> _version 2.2
==> _type PolyhedralFan
==>
==> AMBIENT_DIM
==> 2
==>
==> DIM
==> 2
==>
==> LINEALITY_DIM
==> 0
==>
==> RAYS
==> 0 -1 # 0
==> 0 1 # 1
==> 1 0 # 2
==>
==> N_RAYS
==> 3
==>
==> LINEALITY_SPACE
==>
==> ORTH_LINEALITY_SPACE
==> -1 0 # 0
==> 0 -1 # 1
==>
==> F_VECTOR
==> 1 3 2
==>
==> SIMPLICIAL
==> 1
==>
==> PURE
==> 1
==>
==> CONES
==> {} # Dimension 0
==> {0} # Dimension 1
==> {1}
==> {2}
==> {0 2} # Dimension 2
==> {1 2}
==>
==> MAXIMAL_CONES
==> {0 2} # Dimension 2
==> {1 2}
==>
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