A Note on Molecular Absorption in Interstellar Space

A note on modular hyperconvex space

Interstellar isotope ratios from mm-wave molecular absorption spectra

We have measured galactic λ3mm absorption spectra of HCO+, HCN, HNC, and CS toward compact extragalactic continuum sources in order to derive the isotopic abundance ratios 12C/13C, 14N/15N, 16O/18O, and 32S/34S in local diffuse clouds. For carbon, our data confirm recent results for the local ISM: we find 12C/13C = 59 ± 2. For nitrogen, we find 14N/15N = 237(−21,+27) consistent with the Solar v...

a note on modular hyperconvex space

A Note on Quadratic Maps for Hilbert Space Operators

In this paper, we introduce the notion of sesquilinear map on Β(H) . Based on this notion, we define the quadratic map, which is the generalization of positive linear map. With the help of this concept, we prove several well-known equality and inequality...  

A Note On Space Noncommutativity

We consider a two-point spatial lattice approximation to an open string moving in a flat background with B field. It gives a constrained dipole system under the influence of a vector potential. Solving and quantizing this system recover all the essential features of a noncommutative space. In particular, open string interactions induce a canonical product structure on the Hilbert space of the d...