This is a very minor comment about the description/definition of "GL_2 type" in the genus 2 curve page (after clicking the "GL_2 type" link). The last sentence is a bit misleading. Perhaps it should say "the endomorphism algebra is 2-dimensional over Q" as opposed to "the endomorphism algebra is isomorphic to Q \oplus Q". The notation in the latter makes it seem like the endomorphism algebra is isomorphic *as an algebra* to Q \oplus Q, which it need not be. The first sentence of the paragraph points this out, but the (current) last sentence makes it sound like the split quadratic algebra is the only one that can occur among GL_2-type, genus 2 Jacobians. (And this is not the case.)
Best, Ari Shnidman shnid...@bc.edu -- I'll make an Issue for this. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
