The Picard group of motivic A(1)

Bogdan Gheorghe, Daniel C. Isaksen, Nicolas Ricka

We show that the Picard group $Pic(A(1))$ of the stable category of modules over $\mathbb{C}$-motivic $A(1)$ is isomorphic to ${\mathbb{Z}}^4$. By comparison, the Picard group of cla…