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[linpy.git] / doc / polyhedra.rst
1 Polyhedra Module
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4 Polyhedron class allows users to build and inspect polyherons. Polyhedron inherits all methods from the :class:`Domain` class.
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6 .. py:class:: Polyhedron(Domain)
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8 .. py:method:: __new__(cls, equalities=None, inequalities=None)
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10 Create and return a new Polyhedron from a string or list of equalities and inequalities.
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12 .. attribute:: equalities
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14 Returns a list of the equalities in a polyhedron.
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16 .. attribute:: inequalities
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18 Returns a list of the inequalities in a polyhedron.
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20 .. attribute:: constraints
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22 Returns a list of the constraints of a polyhedron.
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24 .. py:method:: make_disjoint(self)
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26 Returns a polyhedron as a disjoint.
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28 .. py:method:: isuniverse(self)
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30 Return ``True`` if a polyhedron is the Universe set.
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32 .. py:method:: aspolyhedron(self)
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34 Return the polyhedral hull of a polyhedron.
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36 .. py:method:: __contains__(self, point)
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38 Report whether a polyhedron constains an integer point
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40 .. py:method:: subs(self, symbol, expression=None)
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42 Subsitute the given value into an expression and return the resulting
43 expression.
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45 .. py:method:: fromstring(cls, string)
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47 Create and return a Polyhedron from a string.
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50 To create a polyhedron, the user can use the following functions to define equalities and inequalities as the constraints.
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52 .. py:function:: Eq(left, right)
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54 Returns a Polyhedron instance with a single constraint as *left* equal to *right*.
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56 .. py:function:: Ne(left, right)
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58 Returns a Polyhedron instance with a single constraint as *left* not equal to *right*.
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60 .. py:function:: Lt(left, right)
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62 Returns a Polyhedron instance with a single constraint as *left* less than *right*.
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64 .. py:function:: Le(left, right)
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66 Returns a Polyhedron instance with a single constraint as *left* less than or equal to *right*.
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68 .. py:function:: Gt(left, right)
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70 Returns a Polyhedron instance with a single constraint as *left* greater than *right*.
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72 .. py:function:: Ge(left, right)
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74 Returns a Polyhedron instance with a single constraint as *left* greater than or equal to *right*.