Hannan Sadar schrieb:
I saw on Voss-mathmode.pdf the notation \eqdef and i hand't succeeded to use it in LyX. Do I need to use some preamble?
Yes, Herbert described the needed definition in chap. 19 and 63 (or search in the pdf).
Is there a symbol :=?
Look at
ftp://ftp.dante.de/tex-archive/info/symbols/comprehensive/symbols-a4.pdf
Table 45 and 47 (command \coloneq(q) from mathabx or txfonts-package)
regards Uwe
