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A comment on Einsum Is All You Need – Einstein Summation in Deep Learning (2018). Parent comment

Re:Einsum Is All You Need – Einstein Summation in Deep Learn... by feanaro on Sunday February 03, 2019 @07:28AM (#19069249)
As an analogy, why do you write A⋅B instead of Sum[i](A[i] * B[i])?
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Re:Einsum Is All You Need – Einstein Summation in Deep Learn... by joppy on Monday February 04, 2019 @07:32PM (#19082057)
This is a bit of a red herring - why would people using Einstein notation write A[i] B[i] instead of writing A⋅B?
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Re:Einsum Is All You Need – Einstein Summation in Deep Learn... by feanaro on Tuesday February 05, 2019 @02:46AM (#19083627)
They wouldn't. My point was that A⋅B is also hiding a sum across all indices, just like Einstein notation. The sum never changes and is therefore visual/cognitive noise, once you've understood it the first time. The dot product is an abstraction that hides it and makes it implied.
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