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92 442 (0,167s) •

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The unitary Cuntz semigroup on the classification of non-simple C*-algebras

This paper argues that the unitary Cuntz semigroup, introduced in [10] and termed Cu1, contains crucial information regarding the classification of non-simple C⁎-algebras. We exhibit two non-simple C⁎-algebras that agree on...

Pure mathematics

  • 2023
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  • Jimp
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  • Link
Result

Non-semigroup gradings of associative algebras

It is known that there are Lie algebras with non-semigroup gradings, i.e. such that the binary operation on the grading set is not associative. We provide a similar example in the class of associative algebras....

Pure mathematics

  • 2017
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  • Jimp
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  • Link
Result

Ordered semigroups of size at most 7 and linearly ordered semigroups of size at most 10

We construct, classify and enumerate all non-isomorphic ordered semigroups of size at most 7. In the special case of linearly ordered semigroups we achieve size 10....

BA - Obecná matematika

  • 2014
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  • Jx
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  • Link
Result

A finitely generated variety of combinatorial inverse semigroups having uncountably many subvarieties

A finite combinatorial inverse semigroup of moderate size is presented such that the variety of combinatorial inverse semigroups generated by this semigroup posseses the cardinality of the continuum. Moreover, the mentioned...

BA - Obecná matematika

  • 2002
    • •
  • Jx
Result

Semigroup Distances of Finite Groupoids

. It is proved that there are finite non-associative groupoids having their semigroupThe simplest cases of non-associative groupoids are presented by groupoids (so called SH-groupoids) having just one non-associati...

BA - Obecná matematika

  • 2014
    • •
  • Jx
Result

Groupoids and the Associative Law VII. (Semigroup Distance of SH-Groupoids)

Szasz-Hájek groupoids are those groupoids that contain just one non-associative (ordered) triple of elements. These groupoids were studied by G. Szász. The present short note is concerned with semigroup distances of SH-groupoids of ...

BA - Obecná matematika

  • 2006
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  • Jx
Result

On L2- boundedness of a C0-semigroup generated by the perturbed Oseen-type operator arising from flow around a rotating body

We deal with a C0-semigroup generated by the linearized problem for perturbations of a flow of an incompressible viscous fluid around a rotating body. Although the uniform growth bound of the semigroup is non-negative, we d...

BA - Obecná matematika

  • 2007
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  • Jx
Result

The Clifford Deformation of the Hermite Semigroup

al., Laguerre semigroup and Dunkl operators, arXiv:0907.3749]. We establish ofthe (holomorphic) Hermite semigroup, and also give a detailed analytic treatment of the series expansion of the associated integral transform....

BA - Obecná matematika

  • 2013
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  • Jx
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  • Link
Result

An equimorphic diversity case

B.M. Schein has proved that in the semigroup variety NIB = Mod(x(2) = x, xuvy = xvuy) of normal bands one can find at most four pairwise non-isomorphic semigroups semigroup variety (NB) over tilde = Mod(x(2)y = xy,...

BA - Obecná matematika

  • 2011
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  • Jx
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  • Link
Result

Endomorphism monoids in varieties of commutative semigroups

A concrete category is almost universal if its class of non-constant morphisms contains an isomorphic copy of every category of algebras as a full subcategory. This paper characterizes almost universal varieties of commutative semigroups...

BA - Obecná matematika

  • 2013
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  • Jx
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  • Link
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