CffSurfaceGroup

Symbolica documentation for getting started, symbolic expressions, numerical evaluation, pattern matching, and APIs in Python and Rust.

`CffSurfaceGroup`

class CffSurfaceGroup

Equivalent energy surfaces and their maximum simultaneous pole order.

Examples

from symbolica import S, E
from symbolica.community import hepkit as hep
model = hep.Model.phi4()
process = model.process(["phi", "phi"], ["phi", "phi"])
result = process.generate_diagrams(loops=1)
diagram = result.diagrams[0]
result = diagram.integrate_energy(method="cff")
group = result.raised_surface_groups()[0]
coefficients = result.pole_coefficients(group)

Attributes

Name	Description
`max_order`	Highest inverse surface power occurring on one CFF branch.
`surfaces`	Canonical energy surfaces identified by this group.

`max_order`

CffSurfaceGroup.max_order: builtins.int

Highest inverse surface power occurring on one CFF branch.

Examples

Using the setup in the CffSurfaceGroup class example:

highest_pole = group.max_order
assert highest_pole >= 1

`surfaces`

CffSurfaceGroup.surfaces: builtins.list[EnergySurface]

Canonical energy surfaces identified by this group.

Examples

Using the setup in the CffSurfaceGroup class example:

equivalent_surfaces = group.surfaces

Methods

Name	Description
`__repr__`	Summarize the equivalent surfaces and maximum pole order.
`_repr_html_`	Render equivalent surface definitions and their maximum pole order.

`repr`

CffSurfaceGroup.__repr__() -> builtins.str

Summarize the equivalent surfaces and maximum pole order.

Examples

text = repr(group)

`_repr_html_`

CffSurfaceGroup._repr_html_() -> builtins.str

Render equivalent surface definitions and their maximum pole order.

Examples

html = group._repr_html_()