Acta Scientiarum Mathematicarum

<H3>Your browser does not support frames in the HTML document.</H3><P> <P> Get a new browser at <A HREF="http://www.netscape.com">Netscape</a> or <A HREF="http://www.microsoft.com">Microsoft</A>. <P> If you are absolutely unable to do that, than you may continue at <A HREF="index_menu.htm">the index_menu</A> page!