tuples_to_laurent

tuples_to_laurent(pairs, variables)

Reconstruct an expanded SymPy expression from (exponents, coefficient) pairs.

• pairs: iterable of (exponents, coefficient), where exponents is a tuple of Rationals.

• variables: the variable order used for the exponent tuples. If a single Symbol is provided, it’s treated as (that_symbol,). If None, variables are inferred from coefficients (useful for constant-only inputs), and exponents must be empty tuples.

Returns:

Expanded SymPy expression equivalent to the original Laurent polynomial/series.

Parameters:

• pairs (Iterable[tuple[tuple[Rational, ...], Expr]])

• variables (Iterable[Symbol] | Symbol)

Return type:

Expr