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visits member for 4 years, 5 months
seen Dec 9 at 1:41

Oct
30
comment What requirements should a CRC polynomial satisfy?
You should restate your question more clearly. Under what constraints? (e.g. given the polynomial degree) Are you talking about GF2 polynomials? (the usual for cyclic redundancy check e.g. CRC-16-CCITT and CRC-32-IEEE 802.3) Or GF2^N as in Reed-Solomon codes which are essentially similar?
Oct
18
awarded  Organizer
Oct
18
revised Median of distinct numbers
edited tags
Oct
18
accepted do Householder reflections describe all reflections?
Oct
18
answered determining orthonormal matrix of rank N with special first row
Oct
18
awarded  Scholar
Oct
18
accepted determining orthonormal matrix of rank N with special first row
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