<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">As I understand it, the star notation is the standard way of denoting the injection of an entity from, say, the standard reals to the non-standard reals. It is normally written as a prefix operator. Maybe we could do something using our ⋆ character. But we have two other naming conventions in NSA: the prefixes hr and NS. </div><div class=""><br class=""></div><div class="">A lot of work needs to be done in order to bring this development up-to-date. I’m glad to see that the star operator is now fully integrated into the axiomatic type class system, but quite a lot of material made redundant by that step is still present.</div><br class=""><div class="">
<span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-size: 11px; font-variant-ligatures: normal; font-variant-position: normal; font-variant-numeric: normal; font-variant-alternates: normal; font-variant-east-asian: normal; line-height: normal; border-spacing: 0px;"><div class="">Larry</div></span>
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<br class=""><div><blockquote type="cite" class=""><div class="">On 3 Mar 2017, at 09:28, Makarius <<a href="mailto:makarius@sketis.net" class="">makarius@sketis.net</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">On 27/02/17 18:22, Lawrence Paulson wrote:<br class=""><blockquote type="cite" class=""><br class="">Note: I have no suggestions for improving the star notation of<br class="">non-standard analysis, mentioned in the last paragraph.<br class=""></blockquote><br class="">Can you point to some literature or papers that use the notation in a<br class="">canonical form?<br class=""><br class=""><br class=""><span class="Apple-tab-span" style="white-space:pre"> </span>Makarius<br class=""><br class=""><br class=""></div></div></blockquote></div><br class=""></body></html>