ams/substack-expand - TeXForm rewrite rule

Level: AuthoringFaithfulCorpusEquivFaithful, Corpus, and Equiv apply this rule.
Fidelity: renderPreserves rendering under the reference renderer.
Package: ams
Source: ams/faithful/substack/substack_expand.rs (opens in new tab)
Triggers: \substack command
Eliminates: \substack command
Produces: subarray environment

Rewrite patterns#

Each example shows this rule applied in isolation. A complete normalization profile may make additional changes.

Before

\sum_{\substack{1\le i\le n\\ i\text{ odd}\\ i\ne 5}} a_i

After this rule

\sum_{\begin{subarray}{c}1\le i\le n\\ i\text{ odd}\\ i\ne 5\end{subarray}} a_i

Rendering verified with the declared packages.

base/buildrel-to-stackrel Rewrite plain TeX buildrel syntax to stackrel.
base/duplicate-mathrel-wrapper-drop Drop one directly nested duplicate mathrel wrapper.
base/widehat-to-hat Drop stretchiness from \widehat by rewriting it to \hat.
base/widetilde-to-tilde Drop stretchiness from \widetilde by rewriting it to \tilde.
base/stackbin-expand Expand stackbin to an explicit binary-level stacked operator form.
base/stackrel-expand Expand stackrel to an explicit relation-level stacked operator form.

TransformEngine(profile="corpus", disable_rules=["ams/substack-expand"])

new TransformEngine({ profile: 'corpus', disableRules: ['ams/substack-expand'] })