3 ms·
I like this introduction. Often it helps to get used to doing symbol manipulations before trying to fully understand things, and I think tensors are a good exam
by OscarCunningham 13y ago
I like this introduction. Often it helps to get used to doing symbol manipulations before trying to fully understand things, and I think tensors are a good example.
(By the way, the map "f hat" is at one point described as "multilinear". I think that it's actually linear. After all, it comes out of a tensor product whereas bilinear maps can only really come out of a direct product.)
- yetanotherphd 13y agoWhere? You should point this out so the author can correct it - I couldn't find a point where f-hat was described as multi-linear, which would certainly be a mistake.* It looked to me that f-hat was correctly described as a linear map throughout the article. *Yes, technically a linear map is a multilinear map with rank-1.
- j2kun 13y agoAuthor here: I saw this and should have replied when I did fix it. I'm very appreciative for the feedback from the HN community.
- yetanotherphd 13y agoI see. Great article by the way, I learnt tensor products through physics/exterior algebra, but they tend to teach tensor products and symmetrization/antisymmetrization at the same time. Seeing the plain tensor product was very informative.