Venkatesh Rao@vgr·Sep 28, 2021Replying to @prerationalistOnce someone told me it’s a matrix that is a vector divided by a vector. Never did figure out what that meant.16
QC (4/10 Substack posts)@QiaochuYuan·Sep 28, 2021Replying to @vgr and @prerationalistthat doesn’t mean anything 🤔16
Venkatesh Rao@vgrReplying to @QiaochuYuan and @prerationalisty=Ax so.. A= y/x Eg. F=MA F and A are force and acceleration vectors, so M is the inertia tensor. Something like that. Don't quote me. This was like 25y ago.4:38 AM · Sep 28, 20214 Likes
QC (4/10 Substack posts)@QiaochuYuan·Sep 28, 2021Replying to @vgr and @prerationalistoh actually i think i see, thanks. “divides” is like kind of a metaphor for taking the tensor product with the dual space24
Venkatesh Rao@vgr·Sep 28, 2021Replying to @QiaochuYuan and @prerationalistwell I'm glad it makes sense to you still doesn't to me16