<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;"><span style="font-size: 36px;">All,</span><div><span style="font-size: 36px;"><br></span></div><div><span style="font-size: 36px;">I am try to match some E&M problems with analytical solutions. </span></div><div><span style="font-size: 36px;">How do I deal with infinity when using a uniform grid ?</span></div><div><span style="font-size: 36px;"><br></span></div><div><span style="font-size: 36px;">How far out do I need to process, do I need to use a particular technique?</span></div><div><span style="font-size: 36px;"><br></span></div><div><span style="font-size: 36px;">John</span></div></body></html>