...-valued field of H-type has a canonical differential-valued extension. It also adjoins exponential integrals to pre-d-valued fields of H-type. Finally, it describes Liouville closed H-fields, and especially the uniqueness properties of Liouville closure...

..., the source could be a small orifice providing water at a finite rate or a small, shallow pond on the soil surface. banded matrix capillary length disc tension infiltrometer exponential integral fingered flow images line source infiltration matric flux potential sorptivity . . . [N]othing clears up...

... at a polar radius r. The dimensions of Q are [L2T-1] corresponding to a volume of flow per unit time from a unit length of the line perpendicular to the x—y plane. Values of Q are taken to be positive for water entering the system. aquifer background flow central difference drainage ellipse exponential...

.... For example, the head is always nonstationary, except when there is no flow. Anisotropy Co-kriging Dirac delta Exponential integral Green's theorem Head residuals Kriging Perturbation series Residuals The parameters and boundary conditions which control the flow processes vary greatly over short...