<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Is this true, in general?:<div><br></div><blockquote style="margin: 0 0 0 40px; border: none; padding: 0px;"><div><font face="Menlo">fmap h (fmap g f) == fmap (h . g) f</font></div></blockquote><div><br></div><div>Is there a simple proof?</div><div><br></div><div>Thanks,</div><div>-db</div><div><br></div></body></html>