this post was submitted on 04 Aug 2023
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https://piped.video/watch?v=f5liqUk0ZTw

I think I understand the rank one and rank two systems, but I'm not clear about what the 3rd represents on a Cartesian plane.

My mental model involves tying concepts to CAD design and assemblies. I am coming from FreeCAD where picking origins and designing everything on planes is critical.

The thing that I really don't understand about tensors yet is how the origins are derived and relate with different objects in 3d space. I want to assume R3 relates to the origin but I am not sure.

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[–] Rhynoplaz@lemmy.world 1 points 2 years ago (2 children)

Are you guys fucking with me?

I can't decide if this is an extremely specialized question in a general question space, or an invitation to write nonsense just to confuse random passersby like myself.

Or perhaps, maybe both? Either way. Great job and keep up the good work!

[–] NeoNachtwaechter@lemmy.world 3 points 2 years ago (1 children)

just to confuse random passersby like myself.

Is it all about you LOL? Are you the unfortunate kid of Elon?

[–] Rhynoplaz@lemmy.world 2 points 2 years ago

Oh no! You've caught me! Please buy a Tesla so Daddy is happy!

[–] solrize@lemmy.world 2 points 2 years ago (1 children)

It is an ok question but probably better to ask in a math forum. !math!math@lemmy.world maybe.

[–] j4k3@lemmy.world 1 points 2 years ago (1 children)

I don't think Lemmy is big enough for fine grain technical communities in practice. I'm all for growing them but I don't think they are super useful in practice yet. Asking hard questions has yielded no results on several occasions. When I do get a reply from a niche community, it is usually quite a bit later. In an instance like this one, I'm looking for someone that can either point me towards a better reference source or quickly notice where I am incorrectly making assumptions. Generally I've gotten better results putting questions in front of more eyes at any given point in time. I have a few accounts where I have tried probing here and beehaw for expertise in whatever I am currently exploring.

I didn't understand your explanation, but it did help me to read further and realize the direction I was trying to go with intuitively was wrong. Thanks.

[–] solrize@lemmy.world 2 points 2 years ago

Lemmy.ml has a math community with some clueful posters too. I can understand wanting to avoid stack exchange and Reddit. Wikipedia's math reference desk is still ok though, albeit less active than it used to be.