ams/cfrac-to-frac

Level

AuthoringFaithfulCorpusEquivOnly Equiv applies this rule; its output is intended for comparison.

Fidelity

mathPreserves mathematical meaning over the declared input domain.

Package

ams

Source

ams/equiv/fraction_style/cfrac_to_frac.rs (opens in new tab)

Triggers

\cfrac command

Produces

\frac command

Touches

\cfrac command

Rewrite patterns#

1. default-alignment\cfrac{#1}{#2}\frac{#1}{#2}
2. empty-alignment\cfrac[]{#1}{#2}\frac{#1}{#2}

Examples#

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

\cfrac{1}{2}

\frac{1}{2}

\cfrac[]{1}{2}

\frac{1}{2}

\cfrac[l]{1}{2}

\cfrac[l]{1}{2}

\cfrac[r]{1}{2}

\cfrac[r]{1}{2}

Related rules#

Same family#

• ams/dbinom-and-tbinom-to-binom Rewrite AMS display-style and text-style binomial commands to binom.
• ams/dfrac-to-frac Rewrite the AMS display-style fraction command to frac.
• ams/tfrac-to-frac Rewrite the AMS text-style fraction command to frac.
• base/above-to-genfrac Rewrite above to a thickness-preserving genfrac form.
• base/abovewithdelims-to-genfrac Rewrite abovewithdelims to an explicit genfrac with delimiters and thickness.
• base/atop-to-genfrac Rewrite infix atop to an explicit no-rule genfrac form.
• base/atopwithdelims-to-genfrac Rewrite atopwithdelims to an explicit delimited no-rule genfrac form.
• base/brace-to-genfrac Rewrite infix brace to an explicit genfrac with brace delimiters.
• base/brack-to-genfrac Rewrite infix brack to an explicit genfrac with bracket delimiters.
• base/choose-to-binom Rewrite infix choose to an explicit binom command.
• base/over-to-frac Rewrite infix over to an explicit frac command.
• base/overwithdelims-to-genfrac Rewrite overwithdelims to an explicit genfrac with delimiters.
• base/root-of-to-sqrt Rewrite legacy root-of syntax to bracketed sqrt notation.
• base/leftroot-drop Drop the leftroot index-position hint in cleanup-oriented normalization.
• base/uproot-drop Drop the uproot index-position hint in cleanup-oriented normalization.

Notes#

MathJax gives cfrac numerator and denominator explicit struts and textstyle. Only an absent or empty optional alignment is centered and eligible for this projection. The l and r branches carry numerator and denominator alignment and remain unchanged; any other optional value also fails closed. Because the matcher is conditional, cmd:cfrac is touched rather than globally eliminated. Dropping continued-fraction sizing and struts can materially weaken the visible hierarchy even though the mathematical fraction remains, so the rule is Equiv with Math fidelity. Every Applied result replaces one eligible cmd:cfrac node with cmd:frac; aligned and otherwise ineligible branches return Skipped, so the number of eligible cmd:cfrac nodes strictly decreases.

Disable this rule#

TransformEngine(profile="corpus", disable_rules=["ams/cfrac-to-frac"])

new TransformEngine({ profile: 'corpus', disableRules: ['ams/cfrac-to-frac'] })

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