16pt"><SPAN LANG="en-US">this procedure should deliver </SPAN></FONT><FONT SIZE=4 STYLE="font-size: 16pt"><SPAN LANG="en-US"><I>dy(i)/dx</I></SPAN></FONT> <FONT SIZE=4 STYLE="font-size: 16pt"><SPAN LANG="en-US">in </SPAN></FONT><FONT SIZE=4 STYLE="font-size: 16pt"><SPAN LANG="en-US"><I>df(i)</I></SPAN></FONT>
   <FONT SIZE=4 STYLE="font-size: 16pt"><SPAN LANG="en-US"><I><B>def available(n: Int, x: Array[Double], y: Array[Double], </B></I></SPAN></FONT>
                       <FONT SIZE=4 STYLE="font-size: 1