mjo/cone/trivial_cone.py: bye, use sage's cones.trivial() instead

[sage.d.git] / mjo / cone / trivial_cone.py

diff --git a/mjo/cone/trivial_cone.py b/mjo/cone/trivial_cone.py
deleted file mode 100644 (file)
index 17c6835..0000000
--- a/mjo/cone/trivial_cone.py
+++ /dev/null
@@ -1,64 +0,0 @@
-from sage.all import *
-
-def trivial_cone(n, lattice=None):
-    r"""
-    The trivial cone with no generators in ``n`` dimensions.
-
-    INPUT:
-
-      - ``n`` -- the dimension of the ambient space.
-
-      - ``lattice`` -- (default: ``None``) an ambient lattice of rank ``n``
-                       to be passed to the :func:`Cone` constructor.
-
-    OUTPUT:
-
-    The trivial cone with no generators.
-
-    If a ``lattice`` was specified, then the resulting cone will live in
-    that lattice unless its rank is incompatible with the dimension
-    ``n`` (in which case a ``ValueError`` is raised).
-
-    SETUP::
-
-        sage: from mjo.cone.trivial_cone import trivial_cone
-
-    EXAMPLES::
-
-    We can construct the trivial cone as the nonnegative orthant in a
-    trivial ambient space::
-
-        sage: trivial_cone(0)
-        0-d cone in 0-d lattice N
-
-    Or in a nontrivial ambient space::
-
-        sage: trivial_cone(3)
-        0-d cone in 3-d lattice N
-
-    If a ``lattice`` is given, the trivial cone will live in that lattice::
-
-        sage: L = ToricLattice(3, 'M')
-        sage: trivial_cone(3, lattice=L)
-        0-d cone in 3-d lattice M
-
-    TESTS:
-
-    An error is raised if the rank of the lattice disagrees with ``n``::
-
-        sage: L = ToricLattice(1, 'M')
-        sage: trivial_cone(3, lattice=L)
-        Traceback (most recent call last):
-        ...
-        ValueError: lattice rank=1 and dimension n=3 are incompatible
-
-    """
-    if lattice is None:
-        lattice = ToricLattice(n)
-
-    if lattice.rank() != n:
-        raise ValueError('lattice rank=%d and dimension n=%d are incompatible'
-                         %
-                         (lattice.rank(), n))
-
-    return Cone([], lattice)