Hey all, in December, Rigorous Trivialities is hosting the Giant’s Shoulders, a carnival of posts on the history of science. So, please sent submissions through blog carnival. Let’s see if we can get some math in this one.

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Rigorous trivialities is a web log about mathematics, but especially geometry, broadly construed. Contributors will be Charles Siegel, Jim Stankewicz and occasionally Matt Deland. Charles specializes in algebraic geometry, topology and mathematical physics. Jim specializes in arithmetic algebraic geometry. Matt has transitioned from algebraic geometry to work in industry.

Header is taken from the larger work by fdecomite under the creative commons license.

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Hi I’m trying to figure out some basic things.

Maybe you have some entries in your blog about them.

I’m trying to figure out Hom(O(n),O(m))

for O(n) being the usual line bundle on the projective space over a field.

Actually I would like to know

Ext^i(O(n),O(m)). I think I understand the maps

of the corresponding graded modules.

Anyway do you have any blog entries on those?

Otherwise I would make that a request.

Thanks,

Don