#Additional references for multiplicative functions and Tannakian symbols - Torstein’s github repository - See in particular the “Edinburgh notebook”. This is a tutorial on Tannakian symbols in Jupyter notebook format. It can be downloaded and run online in CoCalc (formerly SageMathCloud). - A table of Tannakian symbols attached to some classical multiplicative functions. - A short paper aimed at computer scientists

GP example of linear recurrence (low level)

? install(RgXQ_ratlift,"iGGLLD&D&")
? V=vector(200,i,binomial(i-1,70));
? RgXQ_ratlift(Polrev(V),x^200,99,100,&P,&Q)
%5 = 1
? P