<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On Feb 13, 2010, at 4:20 AM, Taoufik Dachraoui wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div><br></div><div>Does someone know if there is any work done to generate an inverse of any given lisp function (if possible).</div></blockquote></div><br><div>*Any* given function? That would be quite the trick. If you can figure out how to invert, say, AES-ENCRYPT do let us know. Or DELETE-FILE. Inverting multiplication would be pretty cool too. Here's a test case for you:</div><div><br></div><div>(funcall (invert #'*) <span class="Apple-style-span" style="color: rgb(0, 0, 255); font-family: arial, verdana, 'ms sans serif'; font-size: 12px; line-height: 17px; ">412023436986659543855531365332575948179811699844327982845455626433876445565248426198098870423161841879261420247188869492560931776375033421130982397485150944909106910269861031862704114880866970564902903653658867433731720813104105190864254793282601391257624033946373269391)</span></div><div><br></div><div>rg</div><div><br></div></body></html>