Package Amsmath Error Multiple Tag

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Label Will Be Lost Latex

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Label Multiple Equations Latex

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and answer site for users of TeX, LaTeX, ConTeXt, and related typesetting systems. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Multiple labels in aligned environment up vote 11 down alignat latex vote favorite 8 I would like to format an optimization problem by \documentclass{article} \usepackage{amsmath} \begin{document} We want to label each line separately. The inserted text and formulas have to be aligned like in this example: \begin{equation} \begin{aligned} \label{eq:3} & \underset{X}{\text{minimize}} & & \mathrm{trace}(X) \\ & \text{subject to} && X_{ij} = M_{ij}, \; (i,j) \in \Omega, \\ & && X \succeq 0. \end{aligned} \end{equation} \end{document} (Already described in How to label an optimization problem with a label such as (P)?). An ideal alignment of the inserted text and formulas is achieved by the aligned environment. However, I want to label each line separately. By placing \label{...} at each line \begin{equation} \begin{aligned} & \underset{X}{\text{minimize}} & & \mathrm{trace}(X) \label{eq:6}\\ & \text{subject to} && X_{ij} = M_{ij}, \; (i,j) \in \Omega, \label{eq:7} \\ & && X \succeq 0. \label{eq:9} \end{aligned} \end{equation} I get the error message: "Package amsmath Error: Multiple \label's: label 'eq:4' will be lost." How can I label each line individually? cross-referencing

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company latex aligned Business Learn more about hiring developers or posting ads with us TeX - LaTeX Questions latex subequations Tags Users Badges Unanswered Ask Question _ TeX - LaTeX Stack Exchange is a question and answer site for users of TeX, LaTeX, ConTeXt, label equation latex and related typesetting systems. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top amsmath - http://tex.stackexchange.com/questions/103891/multiple-labels-in-aligned-environment multiple labels in one equation up vote 4 down vote favorite I would like to use multiple labels in the same equation when using amsmath. Basic latex already has this feature, but not amsmath, which seems to manipulate labels in complicated ways. Is it possible to alter the amsmath.sty code to restore this feature? Or, alternatively, how to temporarily unload the amsmath package? This issue arises when compiling together different articles with \include, some using amsmath and http://tex.stackexchange.com/questions/40129/amsmath-multiple-labels-in-one-equation not others. But I found that unloading packages is not possible in latex. cross-referencing equations amsmath share|improve this question edited Jan 5 '12 at 21:33 lockstep 161k38486646 asked Jan 5 '12 at 12:02 mosta 3112 Welcome to TeX.SE! You can use backticks, ` `, to "highlight" words and other items that are TeX instructions or filenames. I've done so in your posting. –Mico Jan 5 '12 at 12:15 3 What exactly do you mean by "labels"? Do you want to assign multiple \label{...} commands to one equation, or do you want more than one "tag" (equation number, etc) to show up next to the object of interest? The amsmath package provides the command \tag{...}, which lets users create fairly elaborate tags. –Mico Jan 5 '12 at 12:24 I want to assign multiple \label{...} commands to one equation. I use one label to number the equation, and other labels to number the parameters appearing in it (I use stepcounter, etc..). Labels are used to refer to those parameters (I use ~100 parameters). I would prefer not to alter my document, because I already wrote it without amsmath, but now I need to compile it with another document that uses amsmath... –mosta Jan 5 '12 at 14:13 Have a look at the question tex.stackexchange.com/questions/9939/… and the answer that Martin Scharrer provided. –Mico Jan 5 '12

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about http://tex.stackexchange.com/questions/60566/using-label-with-amsmath-nested-environments Stack Overflow the company Business Learn more about hiring developers or posting ads with us TeX - LaTeX Questions Tags Users Badges Unanswered Ask Question _ TeX - LaTeX Stack Exchange is a question and answer site for users of TeX, LaTeX, ConTeXt, and related typesetting systems. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are latex align voted up and rise to the top Using \label with amsmath nested environments up vote 9 down vote favorite First of all, I'm not sure these environments are supposed to be nested, but the fact is the alignment comes out exactly how I wanted, and no errors are issued. \documentclass[a5paper]{article} \usepackage{amsmath} \begin{document} \begin{gather} \begin{align} a &= b + c \notag \\ %\label{important} b - a &= -c \\ c - a &= -b package amsmath error \end{align} \\ a - (b-a) - (c-a) = 2a \end{gather} \end{document} The problem appears when I uncomment the \label, then compilation is interrupted with: ! Package amsmath Error: Multiple \label's: label 'important' will be lost. The result is still OK, and I wouldn't mind too much if I didn't have to press enter every time I compile... I could bypass amsmath's redefinition of \label as shown here, but is there another possible fix? Or am I doing something fundamentally wrong? horizontal-alignment cross-referencing amsmath share|improve this question edited Jun 20 '12 at 16:21 asked Jun 20 '12 at 15:42 Jellby 1,92511221 add a comment| 5 Answers 5 active oldest votes up vote 4 down vote accepted clearly this is a bug, and will be investigated as such. but here's another horrible hack that merely gives the nasty warning that LaTeX Warning: Label `important' multiply defined. at least you wouldn't have to press enter every time ... \documentclass[a5paper]{article} \usepackage{amsmath} \begin{document} \begin{gather} \begin{align} a &= b + c \tag*{} \\ b - a &= -c \label{important} \\ c - a &= -b \end{align}\\ a - (b-a) - (c-a) = 2a \end{gather} some text with an xref: \eqref{important} \end{document} share|improve this answer answered Jun 20 '12 at 18:52 barbara beeton 57.3k5116251 add a comment| up vote 5 down vote Using a