Questions - ASKSAGE: Sage Q&A Forum

If I had some expression `x^2 + x^3 - 31` and I want to apply a previously defined function `f` to it, is there a quicker way of doing `f(x^2 + x^3 - 31)`? I'm thinking along the lines of Mathematica's `x^2 + x^3 - 31 // f`, where `//` applies the function...

Hello, I'm trying to understand step 3 in the algorithm 1 provided in the paper "Algebraic Reduction of Hidden Markov Models" by Tommaso Grigoletto and Francesco Ticozzi.It requires me to compute alg($\mathcal{X}$) and it is defined in the paper like...

Is there any implemented algorithm [or any algortihm which is not too slow or hard to implement] to find the ***sup***groups of a given group? More precisely, say I have a permutation group $H$ which is given as a subgroup of $S_n$ (the permutation group...

There is a note in the reference manual about Links that even states that "The strands of the braid that have no crossings at all are removed". This is not the expected behavior and can cause trouble if you generate links using braids. I also don't know...