Let $F$ be an algebraically closed field of characteristic $p$ equipped with a nonarchimedean dense absolute value $|\cdot|:F \rightarrow \mathbb{R}_{\ge 0}$ with respect to which $F$ is complete. Let $\mathcal{O}_{F}$ denote the ring of integers of $F$.


>First define the product norm $|\cdot|_{prod}$ on $F\otimes _{\mathbb F_p} F$  in the following way. If $c\in F\otimes _{\mathbb F_p} F$, then
>
>$$|c|_{prod}:=\inf\left\{\max_{1\le i\le n}\{|c_{1,i}||c_{2,i}| \}\ : \ c=\sum^{n}_{i=1}c_{1,i}\otimes c_{2,i}, \text{where }  c_{1,i}, c_{2,i}\in F\right\}$$
>On the other hand, define $|\cdot|'_{prod}$ on the subring $\mathcal{O}_{F}\otimes _{\mathbb F_p} 
\mathcal{O}_{F}$ in the following way. If $c\in \mathcal{O}_{F}\otimes _{\mathbb F_p} 
\mathcal{O}_{F}$, then
>
>$$|d|'_{prod}:=\inf\left\{\max_{1\le i\le n}\{|d_{1,i}||d_{2,i}| \}\ : \ d=\sum^{n}_{i=1}d_{1,i}\otimes d_{2,i}, \text{where } d_{1,i}, d_{2,i}\in \color{red}{\mathcal{O}_{F}}\right\}$$

>In both definitions the infimum is taken over all the possible ways to write the element as a sum of pure tensors in the respective rings.
>Is it true that $|\cdot|'_{prod}$ and $|\cdot|'_{prod}$ coincide when restricting them to elements of $\mathcal{O}_{F}\otimes _{\mathbb F_p} 
\mathcal{O}_{F}$?


My first guess is that the answer is true. I am able to show that they do coincide on pure tensors in $\mathcal{O}_{F}\otimes _{\mathbb F_p} 
\mathcal{O}_{F}$, more precisely I showed that $|x\otimes y|'_{prod}=|x\otimes y|'_{prod}=|x|\cdot|y|$ for $x,y\in \mathcal{O}_{F}$, but I am not able to prove that in the general case.