Centrala begrepp
Solving the p-Riccati equation and its implications for factorization of differential operators.
Sammanfattning
This content discusses the algorithmic solutions for the p-Riccati equation and its applications in factorizing differential operators. It presents methods for testing the existence of solutions and computing them efficiently. The content also delves into the complexity of the algorithms and their practical implications.
- Introduction to p-Riccati Equation
- Algorithmic questions related to factorization of linear differential operators.
- Derivation on differential fields and linear differential operators.
- Factorization of Differential Operators
- Study of factorization for operators with coefficients in different fields.
- Comparison between operators in characteristic 0 and characteristic p.
- Contribution of New Algorithms
- Presentation of new algorithms for solving the p-Riccati equation.
- Implications for factorization of differential operators in positive characteristic p.
- Prolegomena
- Working with differential operators in characteristic p.
- Definition of linear differential operators and their relation to factors.
- Polynomial Time Irreducibility Test
- Algorithm for testing irreducibility of operators based on polynomial time complexity.
- Use of OM-representations and prime elements for computations.
- Solving the p-Riccati Equation
- Algorithm for solving the p-Riccati equation relative to an irreducible polynomial.
- Complexity analysis and applications in factorization of differential operators.
Statistik
"The sum of these costs over the poles of a results in O(d3xd2y) operations in Fpb."
"By the symmetry of the roles of x and a, the similar process over the poles of x costs Oε(d3yd2x) operations in Fpb."
"The sum of these terms over the poles of a and x gives the final result."
Citat
"The analogous result for algebraic functions fields is that for an algebraic function field F = Fq(x)[y]/f(x,y), where f is a monic integral polynomial, and an irreducible polynomial P ∈ Fq[x], an OM-factorisation of the prime ideals dividing P can be computed in Oε(deg(P) degy(f)δ) operations in Fq if char(Fq) > degy(f), and Oε(deg(P)(degy(f)δ + δ2)) operations in Fq otherwise."
"The analogous algorithm takes as input a monic irreducible polynomial f(x, y) ∈ Fq[x][y] generating an algebraic function field of positive characteristic F ≃ Fq(x)[y]/f(x,y), together with an irreducible polynomial P ∈ Fq[x], and it returns the divisor (P) = e(P1|P) · P1 + . . . + e(Pg|P) · Pg as well as prime elements tPi for all the places in Supp(P)."