👉 In mathematics, a frden (Frobenius Denominator) is an element of a commutative ring that is invertible. It is defined as follows: Let R be a commutative ring with unity and let d be a non-zero divisor in R[x]. The frden of d is the unique element x such that there exists an invertible element y in R such that \[d = \frac{y}{x}.\] The frden is denoted by
