Tag Archives: free

New Open (and Free to Publish) Journal in Algebraic Geometry

Since the introduction of the Forum of Mathematics journals, there has certainly been some disdain at its probably eventual policy of charging authors for publication. Here is one example of a journal that will be free to publish in and read: Algebraic Geometry, which is being run by Foundation Compositio Mathematica. This organisation already runs […]

Infinite Integer Product Not Free

Introduction Assuming the axiom of choice, any vector space possesses the pleasant but prosaic property* that it is determined up to isomorphism by the cardinality of its basis. For instance, consider $ \prod_\omega \mathbb{Z}/2$ and $ \oplus_{2^\omega} \mathbb{Z}/2$. Both are vector spaces over the finite field $ \mathbb{Z}/2$ so to show that they are isomorphic, […]