feynml.interface.formcalc.topology.Topology

class feynml.interface.formcalc.topology.Topology(order: int, propagators: List[feynml.interface.formcalc.propagator.Propagator])

Bases: object

__init__(order: int, propagators: List[Propagator]) → None

Methods

__init__(order, propagators)
from_str(topology)	Example
n()	Example
re()
to_feynml(insertions)

Attributes

order
propagators

classmethod from_str(topology: str)

Example

>>> str(Topology.from_str('Topology[1][        Propagator[Incoming][Vertex[1][1], Vertex[3][5], Field[1]],         Propagator[Incoming][Vertex[1][2], Vertex[3][6], Field[2]],         Propagator[Outgoing][Vertex[1][3], Vertex[3][6], Field[3]],         Propagator[Outgoing][Vertex[1][4], Vertex[3][5], Field[4]],         Propagator[Internal][Vertex[3][5], Vertex[3][6], Field[5]]]'))
'Topology[1][Propagator[Incoming][Vertex[1][1], Vertex[3][5], Field[1]], Propagator[Incoming][Vertex[1][2], Vertex[3][6], Field[2]], Propagator[Outgoing][Vertex[1][3], Vertex[3][6], Field[3]], Propagator[Outgoing][Vertex[1][4], Vertex[3][5], Field[4]], Propagator[Internal][Vertex[3][5], Vertex[3][6], Field[5]]]'

classmethod n()

Example

>>> Topology.n() == Topology.re().count('(') -Topology.re().count('(?')
True