def __init__(self):
"""
TESTS::
sage: sage.rings.infinity.UnsignedInfinity() is sage.rings.infinity.UnsignedInfinity() is unsigned_infinity
True
"""
InfinityElement.__init__(self, UnsignedInfinityRing)
def __init__(self):
"""
TESTS::
sage: sage.rings.infinity.PlusInfinity() is sage.rings.infinity.PlusInfinity() is oo
True
"""
InfinityElement.__init__(self, InfinityRing)
def __init__(self):
"""
TESTS::
sage: sage.rings.infinity.UnsignedInfinity() is sage.rings.infinity.UnsignedInfinity() is unsigned_infinity
True
"""
InfinityElement.__init__(self, UnsignedInfinityRing)
def __init__(self):
"""
TESTS::
sage: sage.rings.infinity.PlusInfinity() is sage.rings.infinity.PlusInfinity() is oo
True
"""
InfinityElement.__init__(self, InfinityRing)
def __init__(self):
"""
Initialize ``self``.
TESTS::
sage: sage.rings.infinity.MinusInfinity() is sage.rings.infinity.MinusInfinity() is -oo
True
"""
InfinityElement.__init__(self, InfinityRing)
def __init__(self):
"""
Initialize ``self``.
TESTS::
sage: sage.rings.infinity.MinusInfinity() is sage.rings.infinity.MinusInfinity() is -oo
True
"""
InfinityElement.__init__(self, InfinityRing)