<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="">As I recall, this constant originally comes from HOL Light and is used in a couple of proofs.<div class=""><br class=""></div><div class="">And it occurs to me that it might be a good way of dealing with HOL Light’s generalisation of summations and limits to sets of natural numbers. As I ported the PNT, I used two other methods of dealing with that problem.</div><div class=""><br class=""></div><div class="">At the moment I don’t regard it as heavily used, but I guess it depends on what one is working on at any one time.</div><div class=""><br class=""></div><div class="">I would rather have qualified names than completely arbitrary variations of the name.</div><div class=""><br class=""><div class="">
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 11px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0; "><div class="">Larry</div></span>
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<br class=""><div><blockquote type="cite" class=""><div class="">On 30 Jun 2017, at 15:57, Manuel Eberl <<a href="mailto:eberlm@in.tum.de" class="">eberlm@in.tum.de</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><p style="font-family: LucidaGrande; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class=""><font size="+1" class="">Still, I for one think this is not really worth the trouble of keeping an entirely separate constant around, especially because "subseq h" does not make much sense: "h" itself is not a subsequence of anything, "f ∘ h" is a sub-sequence of "f".<br class=""></font></p><p style="font-family: LucidaGrande; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class=""><font size="+1" class="">It would be interesting to know what other users of Complex_Main think about that.</font></p><br class="Apple-interchange-newline"></div></blockquote></div><br class=""></div></body></html>