%0 Journal Article %A Hemdaoui, Mohammed %T A useful algebra for functional calculus %J Mathematica Bohemica %D 2019 %P 99-112 %V 144 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/MB.2018.0063-17/ %R 10.21136/MB.2018.0063-17 %G en %F 10_21136_MB_2018_0063_17