2015/01/31 by Michel L. Lapidus
Mathematics · Physics and Astronomy · #Combinatorics #Critical line #Mathematical Dynamics and Fractals #Mathematical analysis #Mathematical physics #Mathematics #Operator (biology) #Physics #Pure mathematics #Quantum mechanics #Riemann hypothesis #Riemann zeta function #Theoretical and Computational Physics #Universality (dynamical systems) #advanced mathematical theories #math-ph #math.MP #msc:11M26 #msc:28A75 #msc:28A80 #msc:46F99 #msc:47A10 #msc:47A60 #msc:81S99 #msc:81T99 #msc:82B26 #msc:82B27
paper · pdf · doi:10.1098/rsta.2014.0240
26 pages. To appear in the special issue of the "Philosophical Transactions of the Royal Society", Ser. A., titled "Geometric Concepts in the Foundations of Physics", 2015
arxiv created 2015/05/09 · openalex publication_date 2015/06/29 · arxiv updated 2016/02/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
This research expository article not only contains a survey of earlier work but also contains a main new result, which we first describe. Given c≥0, the spectral operator [Formula: see text] can be thought of intuitively as the operator which sends the geometry onto the spectrum of a fractal string of dimension not exceeding c. Rigorously, it turns out to coincide with a suitable quantization of the Riemann zeta function ζ=ζ(s): a=ζ(∂), where ∂=∂(c) is the infinitesimal shift of the real line acting on the weighted Hilbert space [Formula: see text]. In this paper, we establish a new asymmetric criterion for the Riemann hypothesis (RH), expressed in terms of the invertibility of the spectral operator for all values of the dimension parameter [Formula: see text] (i.e. for all c in the left half of the critical interval (0,1)). This corresponds (conditionally) to a mathematical (and perhaps also, physical) 'phase transition' occurring in the midfractal case when [Formula: see text]. Both the universality and the non-universality of ζ=ζ(s) in the right (resp., left) critical strip [Formula: see text] (resp., [Formula: see text]) play a key role in this context. These new results are presented here. We also briefly discuss earlier joint work on the complex dimensions of fractal strings, and we survey earlier related work of the author with Maier and with Herichi, respectively, in which were established symmetric criteria for the RH, expressed, respectively, in terms of a family of natural inverse spectral problems for fractal strings of Minkowski dimension D∈(0,1), with [Formula: see text], and of the quasi-invertibility of the family of spectral operators [Formula: see text] (with [Formula: see text]).