amsbsy.sty AMS-LaTeX option `amsbsy.sty' (1.1, 21-JUN-1991) ifundefinedextract@font The style option `amsbsy' does not make sense if you do not use a format with the new font selection scheme. ifundefinedamstext.sty\begin{center}\vbox{\input{amstext.sty} }\end{center}