+++ title = "Einsum" +++
In linear algebra and mathematical physics, there is a notational convention called Einstein Notation. The python package numpy implements a function called einsum, which is the first hit when googling the term. Several Julia packages exists that implement einsum functionality. \toc
{{badge Tullio}}
This package implements a macro @tullio, which it describes as
a very flexible einsum macro. It understands many array operations written in index notation -- not just matrix multiplication and permutations, but also convolutions, stencils, scatter/gather, and broadcasting.
{{badge Einsum}} From README.md of this package:
This package exports a single macro @einsum, which implements similar notation to the Einstein summation convention to flexibly specify operations on Julia Arrays, similar to numpy's einsum function (but more flexible!).
{{badge OMEinsum}} From README.md of this package:
This is a repository for the Google Summer of Code project on Differentiable Tensor Networks. It implements one function that both computer scientists and physicists love, the Einstein summation
{{badge TensorOperations}}
{{badge TensorCast}}
{{badge ArrayMeta}}
ArrayMeta.jl exists, but the package is not maintained and registered.
Tortilla.jl was announced in JuliaCon2018, but the package is not public yet.
{{star_history Tullio Einsum OMEinsum TensorOperations TensorCast ArrayMeta}}