From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.comp.tex.context/34934 Path: news.gmane.org!not-for-mail From: "fdu.xiaojf@gmail.com" Newsgroups: gmane.comp.tex.context Subject: questions about math formula Date: Wed, 06 Jun 2007 23:31:15 +0800 Message-ID: <4666D343.8030103@gmail.com> Reply-To: mailing list for ConTeXt users NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Trace: sea.gmane.org 1181143978 23232 80.91.229.12 (6 Jun 2007 15:32:58 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Wed, 6 Jun 2007 15:32:58 +0000 (UTC) To: mailing list for ConTeXt users Original-X-From: ntg-context-bounces@ntg.nl Wed Jun 06 17:32:54 2007 Return-path: Envelope-to: gctc-ntg-context-518@m.gmane.org Original-Received: from ronja.vet.uu.nl ([131.211.172.88] helo=ronja.ntg.nl) by lo.gmane.org with esmtp (Exim 4.50) id 1HvxVF-0002Q8-Q9 for gctc-ntg-context-518@m.gmane.org; Wed, 06 Jun 2007 17:32:53 +0200 Original-Received: from localhost (localhost [127.0.0.1]) by ronja.ntg.nl (Postfix) with ESMTP id 4AAD41FF3D; Wed, 6 Jun 2007 17:32:49 +0200 (CEST) Original-Received: from ronja.ntg.nl ([127.0.0.1]) by localhost (smtp.ntg.nl [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 08100-03-5; Wed, 6 Jun 2007 17:32:38 +0200 (CEST) Original-Received: from ronja.vet.uu.nl (localhost [127.0.0.1]) by ronja.ntg.nl (Postfix) with ESMTP id AD0A91FF03; Wed, 6 Jun 2007 17:32:38 +0200 (CEST) Original-Received: from localhost (localhost [127.0.0.1]) by ronja.ntg.nl (Postfix) with ESMTP id A539C1FF02 for ; Wed, 6 Jun 2007 17:32:37 +0200 (CEST) Original-Received: from ronja.ntg.nl ([127.0.0.1]) by localhost (smtp.ntg.nl [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 08100-03-4 for ; Wed, 6 Jun 2007 17:32:34 +0200 (CEST) Original-Received: from sunm.shcnc.ac.cn (unknown [159.226.128.8]) by ronja.ntg.nl (Postfix) with SMTP id 2F04F1FF01 for ; Wed, 6 Jun 2007 17:32:33 +0200 (CEST) Original-Received: from localhost (localhost.localdomain [127.0.0.1]) by sunm.shcnc.ac.cn (4U Message Server) with ESMTP id F34C7E48055 for ; Wed, 6 Jun 2007 23:52:46 +0800 (CST) Original-Received: from [127.0.0.1] (unknown [202.127.19.74]) by sunm.shcnc.ac.cn (4U Message Server) with ESMTP id 77E85E48053 for ; Wed, 6 Jun 2007 23:52:45 +0800 (CST) User-Agent: Thunderbird 1.5.0.12 (Windows/20070509) X-Virus-Scanned: by AMaViS 0.3.12 X-Virus-Scanned: amavisd-new at ntg.nl X-BeenThere: ntg-context@ntg.nl X-Mailman-Version: 2.1.9 Precedence: list List-Id: mailing list for ConTeXt users List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: ntg-context-bounces@ntg.nl Errors-To: ntg-context-bounces@ntg.nl X-Virus-Scanned: amavisd-new at ntg.nl Xref: news.gmane.org gmane.comp.tex.context:34934 Archived-At: Hi all, I have two questions about math formula. 1) I'd like to use \startalign to typeset mathematical formulas since it is more convenient than \eqalign. But the formula number cannot be located between two lines just as \eqalign can. I hope following example can make me clear. \starttext \placeformula \startformula \eqalign{ a + b & = c + d\cr & = e + f\cr} \stopformula \placeformula \startformula \startalign \NC a + b \NC = c + d \NR[+] \NC \NC = e + f \NR \stopalign \stopformula \stoptext The number of equations in second formula can only be put on the first line or second line but not between them. My question is how to make the location of formula number in \startalign the same as it is in \eqalign ? 2) It seems that \left and \right cannot be used on separate groups. Here is a simple example: \starttext \placeformula \startformula \eqalign{ a & = \left(\frac{b+c}{d+e}\cr &\phantom{=~} + \frac{g}{h}\cr} \stopformula \stoptext If I change \left and \right to \big, it compiles successfully. But I think \left and \right are more convenient. Are there some solutions to use \left and \right in this situation ? Regards, Xiao Jianfeng ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________