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Additional references for multiplicative functions and Tannakian symbols

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###[Additional references for multiplicative functions and Tannakian symbols]()
- Torstein's [github repository](https://github.com/torstein-vik/zeta-types-smc)
- See in particular the ["Edinburgh notebook"](https://github.com/torstein-vik/zeta-types-smc/blob/master/Worksheets-For-Testing/Edinburgh%20Notebook.ipynb). 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](https://github.com/torstein-vik/zeta-types-smc/blob/master/Articles/Function%20table.pdf).
- A [short paper aimed at computer scientists](http://andreasholmstrom.org/wp-content/2017/06/article-zeta-types-tannakian.pdf) 


### GP example of linear recurrence (low level)
? install(RgXQ_ratlift,"iGGLLD&D&")
? RgXQ_ratlift(Polrev([1,2,3,4]),x^200,99,100,&P,&Q)
%2 = 1
? 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