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20022011
most citedExperimentally testable state-independent quantum contextuality

423 citations

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math.GT2002

On the singular braid monoid of an orientable surface

Jeronimo Diaz-Cantos, Juan Gonzalez-Meneses, Jose M. Tornero

In this paper we show that the singular braid monoid of an orientable surface can be embedded in a group. The proof is purely topological, making no use of the monoid presentation.

math.AC2002

Hasse-Schmidt Derivations and Coefficient Fields in Positive Characteristics

M. Fernandez-Lebron, L. Narvaez-Macarro

We show how to express any Hasse-Schmidt derivation of an algebra in terms of a finite number of them under natural hypothesis. As an application, we obtain coefficient fields of t…