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seen Aug 15 at 21:40

Oct
18
revised do Householder reflections describe all reflections?
added 63 characters in body
Oct
18
comment determining orthonormal matrix of rank N with special first row
Hmmm. I don't follow why "its first row and column is all 1/sqrt(n)" is consistent with it being a reflection swapping v and w.
Oct
18
asked do Householder reflections describe all reflections?
Oct
18
comment determining orthonormal matrix of rank N with special first row
ah -- great, thanks, I didn't pick up on that one.
Oct
18
comment determining orthonormal matrix of rank N with special first row
yeah, I had thought of that (see my answer) unfortunately I'm looking for real-valued matrices.
Oct
18
answered determining orthonormal matrix of rank N with special first row
Oct
18
comment determining orthonormal matrix of rank N with special first row
I'm familiar w/ Householder reflections: is there an easy way to get the normal vector n from the two vectors "v" and "w" as you described?
Oct
18
comment determining orthonormal matrix of rank N with special first row
+1, thanks. (p.s. this isn't meant as a criticism, but I am amused by the difference between programmer + mathematician mindsets: "solved" in math circles seems to be proof of existence, "solved" in programmer circles is a description of an algorithm)
Oct
18
comment determining orthonormal matrix of rank N with special first row
ah-- thanks! so you have to escape the \\\\ symbols.
Oct
18
comment determining orthonormal matrix of rank N with special first row
oh, that makes sense. Any further suggestions how to do that?
Oct
18
comment determining orthonormal matrix of rank N with special first row
please help me with my math latex, I tried adapting from other posts but can't seem to get the matrix rows to show up.
Oct
18
revised determining orthonormal matrix of rank N with special first row
added 262 characters in body
Oct
18
asked determining orthonormal matrix of rank N with special first row
Oct
16
comment Finding an angle within an 80-80-20 isosceles triangle
the berkeley link is kind of confusing... but +1 for the name as a key to searching!
Oct
2
awarded  Student
Oct
1
comment good online resources for 2nd-order system dynamics
the problem is there are a lot of mediocre pages out there, and I'm looking for a good one; most of the sources of this type of information just have the transfer function with 1 in the numerator and something in the denominator. (having said that, the one you posted isn't too bad)
Oct
1
comment good online resources for 2nd-order system dynamics
done. (.......)
Oct
1
revised good online resources for 2nd-order system dynamics
added 562 characters in body
Oct
1
asked good online resources for 2nd-order system dynamics
Sep
15
answered Maclaurin Series of $1/(1-x)$ derived from maclaurin series of $(1+x)^n$