To cite package ‘einsum’ in publications use:

Ahlmann-Eltze C, Tsuyuzaki K (2026). einsum: Einstein Summation. R package version 0.2.0, https://github.com/const-ae/einsum.

Corresponding BibTeX entry:

  @Manual{,
    title = {einsum: Einstein Summation},
    author = {Constantin Ahlmann-Eltze and Koki Tsuyuzaki},
    year = {2026},
    note = {R package version 0.2.0},
    url = {https://github.com/const-ae/einsum},
  }