KnowraEinstein notationLinked fromLinked fromThe 9 pages that link to Einstein notation, each with the reason it gives.All 9Broader topic 1Related 7Compared with 1Matrix multiplicationRelated: It compresses the indexed formula for matrix multiplication into a reusable expression.TensorRelated: It compresses the index contractions used to calculate with tensors.Mathematical notationBroader topic: It shows how a notation convention can shorten expressions while preserving meaning.Tensor calculusRelated: It makes tensor equations compact while keeping index contractions explicit.Electromagnetic field tensorRelated: It makes compact index equations for the field tensor and Maxwell’s laws readable.Kronecker deltaRelated: Repeated-index sums make the delta act as an index selector.Vector notationRelated: Index notation writes vector components compactly and exposes coordinate relationships.Bra–ket notationCompared with: Index notation compresses component sums that bra–ket expressions often hide.Ricci calculusRelated: It keeps Ricci calculus expressions compact by suppressing repeated-index sums.