Package Amsmath Error

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Mathit Allowed Only In Math Mode

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Package Amsmath Error Erroneous Nesting Of Equation Structures Align

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 ! Package amsmath Error: \begin{aligned} allowed only in math mode. Althought the display math mode latex pdf is proper! up vote 4 down vote favorite The display pdf is ok but i receive the following error message : ! Package amsmath Error: \begin{aligned} allowed only in math mode. \documentclass[10pt,a4paper]{book} \usepackage[utf8x]{inputenc} \usepackage[greek]{babel} \usepackage{amssymb,amsmath,latexsym,amsfonts,amsthm,cleveref} \newcommand{\abs}[1]{ \left\lvert#1\right\rvert} \newcommand{\norm}[1]{\left\lVert#1\right\rVert} \begin{document} \begin{aligned} \norm{xy}_{\mathbb{H}}^4 ={} & \abs{z+w}^4 + 16(x_3 + y_3 - \frac{1}{2}Im(z\bar{w}))^2 \\ & = \abs{ \abs{z+w}^2 + 4i(x_3 + y_3 - \frac{1}{2}Im(z\bar{w}))}^2}) \\ & = \abs{ \abs{z}^2 + 4ix_3 + 2z\bar{w} + \abs{w}^2+ 4iy_3 }^2 \\ & \leq (\abs{ \abs{z}^2 + 4ix_3} + 2\abs{\bar{z}}\abs{w} + \abs{ \abs{w}^2 +4iy_3})^2 \\ & = (\norm{x}_\mathbb{H}^2 + 2 \abs{\bar{z}}\abs{w} + \norm{y}_\mathbb{H}^2)^2 \\ & \leq ( \norm{x}_\mathbb{H} + \norm{y}_\mathbb{H})^4. \end{aligned} \end{document} errors share|improve this question edited Jul 24 '15 at 20:51 Christian Hupfer 97.1k12101214 asked Jul 24 '15 at 20:44 blackjack 212 I wonder you could get a correct pdf if you have that error. Enclose the aligned environment with $...$ pair. –Christian Hupfer Jul 24 '15 at 21:08 i can't see why the

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and latex label equation policies of this site About Us Learn more about Stack Overflow the latex equation align company Business Learn more about hiring developers or posting ads with us TeX - LaTeX Questions Tags Users Badges align latex 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: http://tex.stackexchange.com/questions/256920/package-amsmath-error-beginaligned-allowed-only-in-math-mode-althought-th 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 “\bar allowed only in math mode” error up vote 2 down vote favorite When I run \begin{align*} \textit{m}(A) &=a&, \\ \textit{\bar{A}} &=1-a& \\ \textit{m}(B) &=0& &\text{for} B \neq A \text{ or} B \neq \bar{A} \end{align*} I get the following http://tex.stackexchange.com/questions/112360/bar-allowed-only-in-math-mode-error error: ! Package amsmath Error: \bar allowed only in math mode.See the amsmath package documentation for explanation.Type H for immediate help.... \end{align} Using \overline instead of \bar doesn't help either. What command should I use to get an overline? math-mode amsmath share|improve this question edited May 4 '13 at 13:01 Jubobs 34.7k10122197 asked May 4 '13 at 12:20 Pratap Dheeraj 2822715 add a comment| 2 Answers 2 active oldest votes up vote 5 down vote accepted There is no need to use \textit (actually it's wrong): \documentclass{article} \usepackage{amsmath} \begin{document} \begin{align*} m(A) &= a, \\ \bar{A} &= 1-a,\\ m(B) &= 0,\quad\text{for $B \neq A$ or $B \neq \bar{A}$} \end{align*} \end{document} Notice how math mode is used inside \text to get spacing right without doing strange things. I don't think it's good to move the textual condition much to the right as you seem to want. share|improve this answer answered May 4 '13 at 12:33 egreg 515k5913812440 add a comment| up vote 4 down vote \bar is not accepted because you have put it inside a text element with \textit{\bar{A}} &=1-a& \\ change this to \mathit{\bar{A}} &=1-a& \\ and

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 Business http://tex.stackexchange.com/questions/103891/multiple-labels-in-aligned-environment 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 voted up and rise to the top Multiple labels in package amsmath aligned environment up vote 11 down 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 package amsmath error 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 amsmath align share|improve this question edited Mar 23 '13 at 15:32 asked Mar 23 '13 at 8:54 Robinaut 401139 4 Using align environment instead of equation and aligned will work: \begin{align} & \max \sum p_t s_t \label{eq:3}\& \text{s.t. } s_t \leq d_t \label{eq:4}\& \sum s_t \leq I \label{eq:5} \end{align} –Peter Grill Mar 23 '13 at 9:14 I need the tighter alignment provided by the aligned environment. The original example did not show the relevant point, so I inserted another example. –Robinaut Mar 23 '13 at 15:30 add a comment| 1 Answer 1 active oldest votes up vote 16 down vote accepted Only one label is possible within the equation environment. However, multiple labels are possible within an align environment. In your case, as in many other, using an align is preferable to using an aligned inside an equation. Moreover,