Talk:Degenerate elliptic equation

From Encyclopedia of Mathematics
Revision as of 08:43, 3 May 2012 by Jjg (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

Post-$\TeX$ notes

  • I have replaced the $\left\|\cdot\right\|$ on the final line by a $[\cdot]$, since the former seemed to me to be a typo, DE experts please check this ...

--Jjg 00:21, 3 May 2012 (CEST)

The Soviet tradition was to denote the matrix with elements $a_{ij}$ by $\|a_{ij}\|$, sometimes with explicit indication of the limits, $\|a_{ij}\|_{i,j=1}^n$. As far as I am aware, the Western style allows both bracketed forms, $(a_{ij})$ and $[a_{ij}]$. In case of potential confusion, I would add the limits to dispel the ambiguity. -- Sergei Yakovenko 08:27, 3 May 2012 (CEST)
Thank you Sergei, one learns something new every day! I think that the present form (without the explicit indices) is sufficiently common in the West that no confusion will arise.
How to Cite This Entry:
Degenerate elliptic equation. Encyclopedia of Mathematics. URL: