1 #LyX 2.3 created this file. For more info see http://www.lyx.org/
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6 \origin /systemlyxdir/examples/
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39 \use_package amsmath 1
40 \use_package amssymb 1
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83 \begin_layout Standard
88 environment is provided in LyX by the
92 module (Document > Settings > Modules).
93 It is helpful to group logically-linked equations.
94 For example, the one-speed one-dimensional integro-differential equation
96 \begin_inset Formula $0\le x\le X$
100 \begin_inset Formula $-1\le\mu\le1$
108 \begin_inset CommandInset ref
110 reference "eq:odoglbe"
114 has associated boundary conditions shown in Eqs.
119 \begin_inset CommandInset ref
126 \begin_inset CommandInset ref
133 \begin_inset Flex Subequations
136 \begin_layout Plain Layout
139 \mu\frac{d\psi\left(x,\mu\right)}{dx}+\Sigma_{t}\left(x\right)\psi\left(x,\mu\right) & =\intop_{-1}^{1}\frac{\Sigma_{s}\left(x,\mu'\to\mu\right)}{2}\psi\left(x,\mu'\right)d\mu'+\frac{Q\left(x,\mu\right)}{2},\label{eq:odoglbe}\\
140 \psi\left(0,\mu\right) & =\psi\left(0,-\mu\right)\,,\,0<\mu\le1,\label{eq:rlbc}\\
141 \psi\left(X,\mu\right) & =0\,,\,-1\le\mu<0.\label{eq:vrbc}
147 \begin_inset CommandInset label
149 name "eq:odoglbeset_aligned"
161 \begin_layout Standard
162 In the previous case, the equations use the
170 environment; however, this is not necessary as shown in Eqs.
175 \begin_inset CommandInset ref
177 reference "eq:odoglbenoa"
182 \begin_inset CommandInset ref
184 reference "eq:vrbcnoa"
190 \begin_inset Flex Subequations
193 \begin_layout Plain Layout
196 \mu\frac{d\psi\left(x,\mu\right)}{dx}+\Sigma_{t}\left(x\right)\psi\left(x,\mu\right)=\intop_{-1}^{1}\frac{\Sigma_{s}\left(x,\mu'\to\mu\right)}{2}\psi\left(x,\mu'\right)d\mu'+\frac{Q\left(x,\mu\right)}{2},\label{eq:odoglbenoa}
204 \psi\left(0,\mu\right)=\psi\left(0,-\mu\right)\,,\,0<\mu\le1,\label{eq:rlbcnoa}
210 \begin_inset CommandInset label
212 name "eq:odoglbeset_individual"
219 \psi\left(X,\mu\right)=0\,,\,-1\le\mu<0.\label{eq:vrbcnoa}
232 \begin_layout Standard
233 As an alternative to cross-referencing each subequation directly, the group
234 of subequations (i.e., Eq.
239 \begin_inset CommandInset ref
241 reference "eq:odoglbeset_aligned"
250 \begin_inset CommandInset ref
252 reference "eq:odoglbeset_individual"
256 ) can be referenced by placing a label within the subequation inset but
257 outside the equation(s).