Anders Host-Madsen <ahostmadsen <at> yahoo.com> writes:

> 
> How can you put an align or align* environment inside a table?
> There seems to be some pure latex solutions, i.e., using
> tabularx instead of tabular or aligned instead of align 
> (I haven't tried), but they appear to be incompatible with lyx.

You can try putting a parbox in a table cell and putting the align
environment in the parbox. I think you will need to set the column width for
the table, then set the parbox width to match. Here is a small example:

#LyX 2.1 created this file. For more info see http://www.lyx.org/
\lyxformat 474
\begin_document
\begin_header
\textclass article
\use_default_options true
\maintain_unincluded_children false
\language english
\language_package default
\inputencoding auto
\fontencoding global
\font_roman default
\font_sans default
\font_typewriter default
\font_math auto
\font_default_family default
\use_non_tex_fonts false
\font_sc false
\font_osf false
\font_sf_scale 100
\font_tt_scale 100
\graphics default
\default_output_format default
\output_sync 0
\bibtex_command default
\index_command default
\paperfontsize default
\spacing single
\use_hyperref false
\papersize letterpaper
\use_geometry true
\use_package amsmath 1
\use_package amssymb 1
\use_package cancel 1
\use_package esint 1
\use_package mathdots 1
\use_package mathtools 1
\use_package mhchem 1
\use_package stackrel 1
\use_package stmaryrd 1
\use_package undertilde 1
\cite_engine basic
\cite_engine_type default
\biblio_style plain
\use_bibtopic false
\use_indices false
\paperorientation portrait
\suppress_date false
\justification true
\use_refstyle 1
\index Index
\shortcut idx
\color #008000
\end_index
\leftmargin 1in
\topmargin 1in
\rightmargin 1in
\bottommargin 1in
\secnumdepth 3
\tocdepth 3
\paragraph_separation skip
\defskip smallskip
\quotes_language english
\papercolumns 1
\papersides 1
\paperpagestyle default
\tracking_changes false
\output_changes false
\html_math_output 0
\html_css_as_file 0
\html_be_strict false
\end_header

\begin_body

\begin_layout Standard
\noindent
\align center
\begin_inset Tabular
<lyxtabular version="3" rows="2" columns="2">
<features rotate="0" tabularvalignment="middle">
<column alignment="center" valignment="top">
<column alignment="center" valignment="top" width="50text%">
<row>
<cell alignment="center" valignment="top" topline="true" bottomline="true"
leftline="true" usebox="none">
\begin_inset Text

\begin_layout Plain Layout
a column title
\end_layout

\end_inset
</cell>
<cell alignment="center" valignment="top" topline="true" bottomline="true"
leftline="true" rightline="true" usebox="none">
\begin_inset Text

\begin_layout Plain Layout
another column title
\end_layout

\end_inset
</cell>
</row>
<row>
<cell alignment="center" valignment="top" topline="true" bottomline="true"
leftline="true" usebox="none">
\begin_inset Text

\begin_layout Plain Layout
a row header
\end_layout

\end_inset
</cell>
<cell alignment="center" valignment="top" topline="true" bottomline="true"
leftline="true" rightline="true" usebox="none">
\begin_inset Text

\begin_layout Plain Layout
\begin_inset Box Frameless
position "t"
hor_pos "c"
has_inner_box 1
inner_pos "t"
use_parbox 1
use_makebox 0
width "50col%"
special "none"
height "1in"
height_special "totalheight"
status open

\begin_layout Plain Layout
\begin_inset Formula 
\begin{align*}
a-c & =b\\
2z & \ge9
\end{align*}

\end_inset


\end_layout

\end_inset


\end_layout

\end_inset
</cell>
</row>
</lyxtabular>

\end_inset


\end_layout

\end_body
\end_document



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