[cstex] 2. a vyssia derivacia s indexom

[beerb at frcatel.fri.uniza.sk]

zdravim, prikladam kusok kodu, ktory blbne, uz som asi prisiel na to, kde
je chyba

ked dam celu nasledujucu sekvenciu medzi begin a end{document}
tak to funguje, ale ked nacitam makra pred begin document zo suboru
pomocou \include tak to blbne a hlasi chybu

beerb


\newcommand\yD[1][]{y_{#1}''}

\newcommand\droTX[3][1]{\ifthenelse{\equal{#1}{z}}{$ay^{(m)}=0$}{%
%----------------------------------------------------------------
\ifthenelse{\equal{#2}{x}}{ZLE}{$\yD[0]=1$}}
}

\droTX[z]{1}{2}

\droTX[2]{1}{2}