
How much of mathematical invention can be automated?Bruno Buchberger, Johannes Kepler University, LinzFriday May 3rd, 11:30am, IRMACS theatre, ASB 10900.
Abstract: This talk proceeds on two floors. On the first floor, we give a short introduction to the theory and method of Gröbner bases. This is a general algorithmic approach to the solution of a fundamental problem in commutative algebra (polynomial ideal theory), which prior to the solution in the speaker's PhD thesis in 1965, was open for several decades. The Gröbner bases method is now available in all mathematical software systems like Mathematica and Maple and has numerous applications in all areas of science and technology, in which nonlinear polynomial systems play a role. There will be practical examples how the method can be used for problem solving in some of theses areas. The key insight on which the Gröbner bases method hinges is the fact that, for handling the infinitely many "divergence" points in the remaindering graph of polynomial systems, the check of finitely many critical points in the reduction graph (the "Spolynomials") is sufficient. On the second floor, we discuss the speaker's recent method of "lazy thinking" for the automated invention and proof of mathematical theorems and algorithms. This method systematizes and combines two simple heuristics: The use of formulae schemes (for proposing potential theorems and algorithms) and the automated analysis of failures in proof attempts. In the talk, we focus on the application of the lazy thinking approach to the automated invention of algorithms. We will first illustrate the method in the standard example of sorting: Starting from a specification of the sorting problem, using various algorithm schemes, we arrive automatically at the various known sorting algorithms (in fact, at whole classes of possible algorithms). We will then show that the method of lazy thinking is powerful enough to synthesize automatically also algorithms for nontrivial problems, e.g. the algorithm for the construction of Gröbner bases, notably the idea of "Spolynomials". Thus, in a way, in this talk the speaker reports on how, in his mature age, he was able to automate his mathematical inventive power of his young age. The speaker will finally draw some conclusions on principal limitations for the automation of mathematical invention; on the role of computers for mathematics and the role of mathematics for computers; and the future and central role of mathematics and computer science for science, technology, economy, and welfare in the 21st century. The talk addresses a general audience of mathematicians and computer scientists. No special background in polynomial ideal theory or automated reasoning is necessary. 