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Feb 20, 2016 at 17:57 comment added passerby I definitely think some such way of "singularizing" an open variety should work. But I didn't think about the details. Also, I don't know if that would answer your question of making the intersection cohomology non-semisimple.
Feb 20, 2016 at 10:40 comment added Piotr Achinger What happens if we take passerby's example and identify the two sections instead of removing them?
Feb 19, 2016 at 21:51 comment added Geordie Williamson Thank you for this example. I really want a projective example (I realise I didn't specify this...) I will add an adjective to the question.
Feb 19, 2016 at 19:41 review First posts
Feb 19, 2016 at 19:53
Feb 19, 2016 at 19:37 history answered passerby CC BY-SA 3.0