For transport phenomena, flux is a vector quantity, describing the magnitude and direction of the flow of a substance or property. In electromagnetism, flux is a scalar quantity, defined as the surface integral of the component of a vector field perpendicular to the surface at each point.
Soft Credit Inquiry. A soft inquiry, or soft pull, is a term used to refer to an inquiry into your credit history that does not adversely affect the credit score. Often, you are not even aware that there has been a soft inquiry on your credit report.
In the end, you are seeking additional credit, so I can't blame those who hard pull. Chase, for instance, is always a hard pull. Others, like Amex, Cap1, Comenity and GE backed cards are normally soft pulls. I don't use the Citi website for increases because you don't really know for sure until it's done. If you try calling them, you can ask if your account is eligible for a increase through soft pull.