Speaker
Description
We present an efficient Mathematica package for the automated calculation of multiloop Feynman diagrams in quantum field theory, supporting both lattice and dimensional regularization. Perturbative computations on the lattice are substantially more complicated than their continuum counterparts due to the nontrivial momentum dependence of lattice propagators and vertices, as well as the proliferation of terms arising from improved actions. The software addresses these challenges by providing a flexible framework for symbolic generation through contractions among vertices, algebraic manipulation, and numerical evaluation of momentum integrals. The package is designed to accommodate a broad class of lattice actions and composite operators, including advanced formulations such as overlap fermions, and supports a variety of renormalization schemes, including the Gauge-Invariant Renormalization Scheme (GIRS). It is particularly well suited for applications involving renormalization, operator mixing, and conversion factors between different renormalization schemes, including those arising in $\mathcal{N}=1$ supersymmetric quantum field theories. In addition, the package includes functionality for efficient compression of large algebraic expressions, enabling users to store intermediate results and recover them for future use without loss of information. The software aims to reduce the time and human effort required for high-order perturbative work while improving reliability, flexibility, and reproducibility.