VakintExpression

symbolica.community.vakint Class

VakintExpression(atom: Any)

A Vakint integral split into its numerator and normalized topology structure.

Construct this wrapper from a Symbolica expression before applying Vakint operations.

Constructor

Split a Symbolica expression into Vakint numerator and topology components.

Examples

from symbolica import E
from symbolica.community.vakint import VakintExpression
integral = E('''
    (
        k(1,11)*k(2,11)*k(1,22)*k(2,22)
      + p(1,11)*k(3,11)*k(3,22)*p(2,22)
      + p(1,11)*p(2,11)*(k(2,22)+k(1,22))*k(2,22)
    )*topo(
         prop(1,edge(1,2),k(1),muvsq,1)
        * prop(2,edge(2,3),k(2),muvsq,1)
        * prop(3,edge(3,1),k(3),muvsq,1)
        * prop(4,edge(1,4),k(3)-k(1),muvsq,1)
        * prop(5,edge(2,4),k(1)-k(2),muvsq,1)
        * prop(6,edge(3,4),k(2)-k(3),muvsq,1)
    )
''', default_namespace="vakint")
wrapped = VakintExpression(integral)
"topo(" in str(wrapped)

Parameters

Name	Type	Default	Description
`atom`	`Any`	`—`	A Symbolica Expression containing a vakint integral, i.e. a sum of terms, each a product of a numerator and a `vakint::topo(...)` structure.

Member details

`str`

Method

__str__() -> str

String representation of the VakintExpression.

`to_expression`

Method

to_expression() -> Expression

Convert the VakintExpression back to a Symbolica Expression.

Examples

from symbolica import E
from symbolica.community.vakint import VakintExpression
integral = VakintExpression(E('''
    k(1,11)*k(1,11)
    *topo(prop(1,edge(1,1),k(1),muvsq,1))
''', default_namespace="vakint"))
"topo(" in str(integral.to_expression())

View generated signature source: docs/api/python/vakint-community.pyi:380