The respondents from SCT, MZV, LE and CE were unable to present an expert structure.
The executors of MZV and CO gave a negative answer to the question about the application of the triangulation principle, while LO executors did not answer this question.
Based on questionnaire analysis and telephone in-depth interviews conducted with the executors of MZV and CE, the authors have established that the unprecedented events were identified with the use of the brainstorming technique.
In  and , this function plays an important role in the theory of regularization of MZVs.
The aim of this paper is to give an alternative, purely algebraic proof of the formula in the setting of abstract algebra of MZVs.
We recall the algebraic setup of MZVs that was introduced by Hoffman .