… There are examples of group schemes for which the Cartan matrix is singular, so that we …
In the case that \(r = t\), it is evident that the module M has periodic cohomology. Or at least, …

… Singularities of this kind have been a classical object of study for centuries. The perspective
on hypersurface singularities … theoretic framework for 2-periodic dg categories, analogous to […

… Moreover, since im^p is a submodule of the singular module 0 Σ?=i K/Kn, then Jζ/ίί =imφ
is also a singular module. Since K is a closed submodule of F, then Z(F/H) = K/H. But then F/H …

… relative periodic cyclic homology $$HP_* ({A_{\bullet }})$$ H P ∗ ( A ∙ ) has regular
singularities, and its monodromy around every point at $$\overline{S}-S$$ S - S is quasi-unipotent. …

… give an example of a superisolated surface singularity (V,0) ⊂ (… singularities and state the
question by Durfee. In the third section we recall results on superisolated surface singularities …

… S is the homotopy category of finite spectra, and (2) where S = D b ( R – mod ) , the derived
category of bounded complexes of finitely generated R–modules over a noetherian ring R. …

… Since the set of modular forms is a graded ring, we can make modular forms out of
various sums of products of the Eisenstein series. For example, M8(SL2(Z)) turns out to be 1-…

… While Lemma 3.2 or Shelah’s Singular Compactness Theorem give us some information
about the structure of a module with enough dense systems for a singular number of generators…

… category D+(R-Mod) is equivalent to the homotopy category H+(R-Inj), where R-Inj is the
category of injective Rmodules. If … X to be a non-singular curve. Corollary 2.14 obviously implies …

… with graph-like singular locus, we present a way to reconstruct the singularity category of X
as … In terms of 2-periodic structures, we have now have two natural transformations on Coh(X) …