<HTML><FONT FACE=arial,helvetica><HTML><FONT SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="1">To answer more exactly the question. The difficulties come that when one calculates the terms of the series, one exceeds rather quickly PostScript's limits (10^38). <BR>
One can test him with the following example PostScript :<BR>
<BR>
/Times-Roman findfont<BR>
15 scalefont<BR>
setfont<BR>
/MG 72 def<BR>
/chaine 15 string def<BR>
/imprime {chaine cvs show } def<BR>
%<BR>
/factorielle<BR>
{ dup 1 gt<BR>
{ dup 1 sub factorielle mul } if<BR>
}<BR>
def<BR>
/nterme %<BR>
{/k exch def<BR>
-1 k exp %(-1)^k<BR>
k factorielle % k!<BR>
mul<BR>
k 1 add factorielle % (k+1)!<BR>
mul<BR>
2 2 k mul 1 add exp % 2^(2k+1)<BR>
mul }<BR>
def<BR>
MG 600 moveto<BR>
16 nterme imprime<BR>
showpage<BR>
<BR>
Manuel<BR>
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