To cite package ‘symengine’ in publications use:

  Ma J, Fernando I, Chen X (2026). _symengine: Interface to the
  'SymEngine' Library_. R package version 0.2.13,
  <https://github.com/symengine/symengine.r>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {symengine: Interface to the 'SymEngine' Library},
    author = {Jialin Ma and Isuru Fernando and Xin Chen},
    year = {2026},
    note = {R package version 0.2.13},
    url = {https://github.com/symengine/symengine.r},
  }