The inverse of $x^3+1$ modulo $x^8+x^4+x^3+x+1$ over $\Bbb F_2$?
2954
Extended Euclidean Algorithm in $GF(2^8)$?
113045
How do I find the inverse of $f(x) = \frac{x}{x^2 + 1}$
99835
Polynomial in $\mathbb{Q}[x]$ with root $\sqrt[3]{2}+\sqrt[3]{3}$
57846
Multiplicative inverse in $\operatorname{GF}(2^8)$?
30045
Solving linear congruences by hand: modular fractions and inverses
64742
Prove a residue matrix $A$ (with coefficients in $\mathbb Z_n)$ has an inverse if and only if $\gcd(\det A,n) = 1$
65923
How to approach proving $f^{-1}(B\setminus C)=A\setminus f^{-1}(C)$?
105325
Expansion of $(1+px+qx^2)^8\equiv 1+8x+52x^2+kx^3$...
22004
Inverse of $y = x^3 + x $?
29979
When is $-3$ a quadratic residue mod $p$?
130104
Show $4x^2+6x+3$ is a unit in $\mathbb{Z}_8[x]$ (inverting unit + nilpotent)
46730
How to show $\mathbb{Q}(\alpha^{4})=\mathbb{Q}(\alpha)$?
145481
Extended Euclidean Algorithm for Modular Inverse
127764
Showing that $\mathbb{Q}[\sqrt{2}, \sqrt{3}]$ contains multiplicative inverses
117970
Find the minimal polynomial for $\sqrt[3]{2} + \sqrt[3]{4}$ over $\mathbb{Q}$
155165
Prove that $\mathbb F_8=\mathbb F_2[X]/(X^3+X+1)$
8784
modulo version of the quadratic formula and Euler's criterion