Isomorphy Classes of Involutions of $\text{SP}(2n,k)$, $n>2$

Robert W. Benim, Aloysius G. Helminck, Farrah Jackson

A first characterization of the isomorphism classes of $k$-involutions for any reductive algebraic groups defined over a perfect field was given by Helminck in 2000 using $3$ invar…