We study the canonical complexifications of non-compact Riemannian symmetric spaces by the Grauert tube construction. We determine the maximal such complexification, a domain already constructed by Akhiezer and Gindikin [1], and show that this domain is Stein. We also determine when invariant complexifications, including the maximal one, are Hermitian symmetric. This is expressed simply in term...

Abstract. R.M. Kashaev conjectured that the asymptotic behavior of his link invariant, which equals the colored Jones polynomial evaluated at a root of unity, determines the hyperbolic volume of any hyperbolic link complement. We observe numerically that for knots 63, 89 and 820 and for the Whitehead link, the colored Jones polynomials are related to the hyperbolic volumes and the Chern–Simons ...

Abstract We show that the PT symmetric Hamiltonians (and their generalizations H = H defined in the text) may be all assigned the projected (so called Feshbach or effective) nonlinear Hamiltonians which are “locally” Hermitian. This implies that many (if not all) of the bound-state energies may be real in a broad domain of Hermiticityviolating interactions. A complexification of a superintegrab...

We introduce a technique for recovering a sufficiently smooth function from its ray transforms over rotationally related curves in the unit disc of 2-dimensional Euclidean space. The method is based on a complexification of the underlying vector fields defining the initial transport and inversion formulae are then given in a unified form. The method is used to analyze the attenuated ray transfo...

We study p-sets and (i)-p-sets for a real function space A and compare them with p-sets for its complexification. We also discuss the relation of p-sets and (i)-p-sets with weak peak sets and weak (i)-peak sets which generalize our result of [7]. Using some of the results, we generalize a result of Izzo [2] (proved for a complex function algebra) for a real function space A. Mathematics Subject...

We study complexified Harmonic Oscillator with a position-dependent mass, termed as Complex Exotic Oscillator (CEO). The complexification induces a gauge invariance [19, 11]. The role of PT -symmetry is discussed from the perspective of classical trajectories of CEO for real energy. Some trajectories of CEO are similar to those for the particle in a quartic potential in the complex domain [10, ...

An unusual type of the exact solvability is reported. It is exemplified by the Coulomb plus harmonic oscillator in D dimensions after a complexification of its Hamiltonian which keeps the energies real. Infinitely many bound states are found in closed form which generalizes the popular harmonic-oscillator states at zero charge and even parity. Apparently, the model is halfway between exact and ...

Let A be a real line arrangement in P(R), and let AC be its complexification. Let CC be the complement P (C) \ ⋃ AC. Let G be the Galois group of C/R. We construct a G-equivariant 2-dimensional strong deformation retract of CC. As an application, we give an explicit presentation of the orbifold fundamental group π1(CC//G), and deduce from it an explicit presentation of the ordinary fundamental ...

A study is made of real Lie algebras admitting compatible complex and product structures, including numerous 4-dimensional examples. If g is a Lie algebra with such a structure then its complexification has a hypercomplex structure. It is shown in addition that g splits into the sum of two left-symmetric subalgebras. Interpretations of these results are obtained that are relevant to the theory ...

Upon complexification of frames and connections, it is shown that the theory of general relativity is transformed to a a spontaneously broken SU(2) × U(1) gauge theory in a curved space-time with S × R topology. The mass spectrum of the standard electroweak model is fully recovered, in spite of the complete absence of a higgs sector. New physics is predicted with gravity-induced electroweak int...