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19992026
most citedOn a regular charged black hole with a nonlinear electric source

132 citations

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cs.DB2026

Extending the (Elementary) Mathematical Data Model and MatBase with two new constraint types: inexistence and anti-existence

Christian Mancas

This research paper introduces two new constraint types and four subtypes of database constraints added to our (Elementary) Mathematical Data Model, which are the duals of the exis…

cs.DB2026

Translating database mathematical schemes into relational database software applications with MatBase

Christian Mancas, Diana Christina Mancas

We present a pseudocode algorithm for translating our (Elementary) Mathematical Data Model schemes into relational ones and associated sets of non-relational constraints, used by M…

cs.DB2024

The (Elementary) Mathematical Data Model Revisited

Christian Mancas

This paper presents the current version of our (Elementary) Mathematical Data Model ((E)MDM), which is based on the naïve theory of sets, relations, and functions, as well as on th…

cs.DB2024

On Enforcing Existence and Non-Existence Constraints in MatBase

Christian Mancas

Existence constraints were defined in the Relational Data Model, but, unfortunately, are not provided by any Relational Database Management System, except for their NOT NULL partic…

cs.DB2023★ 1 cited

On enforcing dyadic-type homogeneous binary function product constraints in MatBase

Christian Mancas

Homogeneous binary function products are often encountered in the sub-universes modeled by databases, from genealogical trees to sports, from education to healthcare, etc. Their pr…