English
Dividing two single terms produces a single term whose exponent is the difference of exponents and whose coefficient is the ratio of coefficients.
Русский
Деление двух одночленных выражений дает одночлен с показателем степени, равным разности степеней, и коэффициентом, равным отношению коэффициентов.
LaTeX
$$ single a r / single b s = single (a - b) (r / s) $$
Lean4
@[simp]
theorem single_div_single (a b : Γ) (r s : R) : single a r / single b s = single (a - b) (r / s) := by
rw [div_eq_mul_inv, sub_eq_add_neg, div_eq_mul_inv, inv_single, single_mul_single]