Green matrices are interpreted as discrete version of functions and used when working with inhomogeneous linear system differential equations. This paper discusses accurate algebraic computations using a recent procedure to achieve an important factorization these high relative accuracy alternative methods. An algorithm compute any minor matrix is also presented. The bidiagonal decomposition th...

The decarbonization of economy and, more specifically, the widespread deployment systems that produce energy from renewable sources require substantial insurance cover, as such a transition process contains seeds new individual and systemic risks. regulations in Europe, aimed at creating incentives for to green economy, with changes consumer preferences, support demand products tied sector ener...

A simple, mild and high efficient procedure for one pot three component synthesis of 2-amino 4-H chromene derivatives was studied. The reaction was performed in water using aryl aldehydes, malononitrile and resorcinol, phloroglucinol or naphthole in the presence of N-methyl D-glucamine (Meglumine) as a green high efficient catalyst. The reaction was studied in thermal, microwave (MW) and ultras...

In this work, Nano TiO2@KSF used as an efficient, homogeneous and reusable catalyst for the synthesis of pyrano[2,3-d]-pyrimidinone derivatives via three-component reactions between malononitrile, barbituric acid and various aldehydes in water. The products were formed in high yields within short reaction times. Also, this catalyst can be reused several times without loss of its catalytic activ...