nx_mathml_lib.nx

nx_mathml_lib.nx -- LATEX SUBSET -> MATHML, THE SOVEREIGN MATH TYPESETTER. WHY THIS EXISTS (measured 2026-09-03). The estate had already chosen MathML as its math rendering path and already had the symbols, and NOTHING joined them: nx_paper_native's grammar takes ".MATH <id> <mathml>" with the MathML subtree VERBATIM, so an author had to hand-write MathML; nx_unicode_math carries ~50 UTF-8 math symbols but no layout. nx_capsearch over 7,266 sources (corpus_complete=1) returns no LaTeX reader of any kind. The missing primitive was the CONVERTER, and it is the one every math surface needs: a board note, a paper, a document in the unified portal, and the applied-math UI all want to write a formula the way a mathematician writes it and have it render. WHY MATHML AND NOT A JAVASCRIPT TYPESETTER. MathML is rendered NATIVELY by the browser, so a page that emits it carries NO third-party runtime, no script, and no network fetch -- which is the estate's standing rule that the oracle stays outside and nothing foreign enters the build or run path. A page using MathJax or KaTeX would import the oracle instead of building the twin. This organ therefore emits markup the browser already understands, and the same bytes render in the Nishi browser. SCOPE, DECLARED RATHER THAN IMPLIED. This is a SUBSET of LaTeX math: numbers, identifiers, operators, superscripts, subscripts, fractions, roots, grouping, the Greek letters and the operator/relation symbols nx_unicode_math already carries, and upright function names. It does NOT do matrices, alignment environments, macros, or text mode. ★AN UNKNOWN COMMAND IS REFUSED BY NAME AND NEVER SILENTLY DROPPED: a typesetter that quietly discards what it does not understand produces a formula that is wrong in a way the reader cannot see, which is worse than no formula at all. SAFETY. Every character that reaches the output as CONTENT goes through the shared html escaper (nx_html_escape.nx). The converter never copies raw input into markup, so a formula carrying markup characters cannot break out of its element -- the same escape-by-construction property the unified document portal is built on. license_tier: ORIGINAL