EUDML

If $τ$ is a hereditary torsion theory on ${𝐌𝐨𝐝}_{R}$ and $Q_{τ} : {𝐌𝐨𝐝}_{R} \to {𝐌𝐨𝐝}_{R}$ is the localization functor, then we show that every $f$ -derivation $d : M \to N$ has a unique extension to an $f_{τ}$ -derivation $d_{τ} : Q_{τ} (M) \to Q_{τ} (N)$ when $τ$ is a differential torsion theory on ${𝐌𝐨𝐝}_{R}$ . Dually, it is shown that if $τ$ is cohereditary and $C_{τ} : {𝐌𝐨𝐝}_{R} \to {𝐌𝐨𝐝}_{R}$ is the colocalization functor, then every $f$ -derivation $d : M \to N$ can be lifted uniquely to an $f_{τ}$ -derivation $d_{τ} : C_{τ} (M) \to C_{τ} (N)$ .

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Etude topologique des formes logarithmiques fermées.

Finite Procedures for Sofic Systems.

A Strengthened Freiheitssatz.

Computing Hecke eigenvalues below the cohomological dimension.

Higher derivations on rings and modules.

Small Cancellation Theory over Free Products with Amalgamation.

Zwei Bemerkungen über die Ricci-Krümmung.

Divisible and Codivisible Modules.

Radical of splitting ring extensions.

Continuity properties of the injectivity radius function

$f$ -derivations on rings and modules

Almost-continuous path connected spaces.

On certain integral Schreier graphs of the symmetric group.

Metric Circles and Bisectors.

Vytvářet spojení s geometrií