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math.AC2021
Graphs represented by Ext
Mohsen Asgharzadeh, Mohammad Golshani, Saharon Shelah
This paper opens and discusses the question originally due to Daniel Herden, who asked for which graph we can find a family of abelian groups such t…
math.AC2021
Kaplansky Test Problems for -Modules in ZFC
Mohsen Asgharzadeh, Mohammad Golshani, Saharon Shelah
Fix a ring and look at the class of left -modules and naturally, we restrict ourselves to the case of rings such that this class is not too similar to the case is…
math.AC1996
Exponentiation in power series fields
Franz-Viktor Kuhlmann, Salma Kuhlmann, Saharon Shelah
We prove that for no nontrivial ordered abelian group G, the ordered power series field R((G)) admits an exponential, i.e. an isomorphism between its ordered additive group and its…