| ![[J. V. Ortiz]](photos/Ortiz_25-1-13.jpg) 
 J. V. OrtizRuth W. Molette Professor Emeritus
 Department of Chemistry and Biochemistry
 Auburn University
 Auburn AL 36849-5312
 U. S. A.
 
  
   Telephone:  (334) 844-6998Fax:  (334) 844-6959
 E-Mail:  ortiz at auburn.edu
 |   |   |   | Chemical bonding in its myriad forms is a manifestation of 
  quantum mechanical principles. We strive to discover the deductive links 
  between these few, but subtle, principles and the infinite variety of 
 structures, spectra, and properties exhibited by molecular matter. There 
  are four stages of this research: derivation, implementation, application, 
  and analysis. In the first two, mathematical and computational tools are 
  developed for efficient and accurate calculations. Applications emphasize 
  interpretation of experimental problems through prediction of molecular 
  observables. Analytical techniques founded on the mathematical structures 
  of the first stage reveal conceptual connections between observables in 
  terms of simplified models. In each stage, we employ propagator concepts 
  and methods, especially those of electron propagator theory, for they stress 
  direct, rigorous calculation of observables and succinct expression of
model   systems. Last updated  21 January 2025   |   |