DiagramThresholdCandidate

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

DiagramThresholdCandidate

class DiagramThresholdCandidate

A topology threshold partition, independent of the requested physical final state.

Examples

Topology candidates depend on the generated graph and may be empty; physical final-state cuts are available separately through diagram.cuts.

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_cross_section(loops=1)
diagram = result.diagrams[0]
cut = diagram.cuts[0]
thresholds = diagram.topology_threshold_candidates
for threshold in thresholds:
    crossing_lines = threshold.edges
    left_region = threshold.left

Attributes

Name	Description
edges	Return threshold-crossing lines in their stored order.
left	Return the left topology selection.
right	Return the right topology selection.
subgraph	Return the oriented crossing half-edge selection.

edges

DiagramThresholdCandidate.edges: builtins.list[DiagramEdge]

Return threshold-crossing lines in their stored order.

Examples

Using the setup in the DiagramThresholdCandidate class example:

crossing_edges = [candidate.edges for candidate in thresholds]

left

DiagramThresholdCandidate.left: Subgraph

Return the left topology selection.

Examples

Using the setup in the DiagramThresholdCandidate class example:

left_regions = [candidate.left for candidate in thresholds]

right

DiagramThresholdCandidate.right: Subgraph

Return the right topology selection.

Examples

Using the setup in the DiagramThresholdCandidate class example:

right_regions = [candidate.right for candidate in thresholds]

subgraph

DiagramThresholdCandidate.subgraph: Subgraph

Return the oriented crossing half-edge selection.

Examples

Using the setup in the DiagramThresholdCandidate class example:

crossing_regions = [candidate.subgraph for candidate in thresholds]