arithmetic

LaTeX visitors for arithmetic expressions.

Visitors: Add, Sub, Mul, Div, MatMul, Neg, Power

Renders the arithmetic AST nodes to LaTeX math strings: sums join with +, products with \cdot, and Div becomes a self-delimiting \frac. Operands are wrapped by operator precedence (via wrap/_PRECEDENCE) so parenthesization stays minimal but correct — e.g. Sub wraps its right operand one level higher so a - (b + c) is grouped, while a \frac needs no wrapping at all.