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π SIMILAR VOLUMES
Motivated by many physical applications, we consider a general first order system of nonlinear partial differential equations involving two independent variables 2, t and a vector field u(z, t). We suppose that the system admits two one parameter Lie groups of transformations with commuting infinite
A mathematical model is presented for describing the groundwater flow in a radial two-layer confined aquifer system with a constant-flux pumping well that has a wellbore skin and finite well radius. The Laplace-domain solution for the model is first derived by the Laplace transforms; and the time-do
## Abstract 3,5βDichlorophenylmercury cyanide (**1**) and phenylethynylmercury cyanide (2) dissolved in DMSOβ__d__~6~ have been investigated using ^13^C, ^15^N and ^199^Hg NMR and density functional theory (DFT) calculations. The longitudinal relaxation times of ^13^C and ^199^Hg nuclei of compound