New posts in Solution Verification

Prove that $A \cup C \subseteq B \cup C$ iff $A \setminus C \subseteq B \setminus C$

Power Series Solution of $y''+y=0$, and Summation Indices

Solution verification: Calculating expected value of sum of three unusual dice

Let $T,U:V\to W$ be linear transformations. Prove that if $W$ is finite-dimensional, then $\text{rank}(T+U)\leq\text{rank}(T) + \text{rank}(U)$.

Prove that all ideals in $\mathbb{Z}[x]$ are generated by two elements.

Is it valid to use operations on both sides before inequality is proven?

Is this a good enough proof by induction?

Show that $\exists c\in (0,1)$ such that $e^{f'(c)}=f(c)+1.$

If a,b,c be roots of $2x^3+x^2+x-1=0$ show that some expression is equal to 16.

Is every group $G$ a subgroup of index $2$ of some $\tilde G$?