2.Current, present, prevailing, prevalent refer to something generally or commonly in use. That which is current is in general circulation or a matter of common knowledge or acceptance: current usage in English. Present refers to that which is in use now; it always has the sense of time: present customs. That which is prevailing is that which has superseded others: prevailing fashion.
E.g. means for example (from the Latin exempli gratia). I.e. means in other words or that is (from the Latin id est). The abbreviations e.g. (from the Latin exempli gratia) and i.e. (from the Latin id est) are often confused. This is because they are both used to introduce some clarification of something previously mentioned. The abbreviation e.g. is used to provide an example:
The functional \(E\) is designed to account for three constraints: one on the first order statistics on the use of atoms from an adaptive, sparse dictionary, one on the spectrum of images, that is on second order pixel values statistics, and one on color histograms, that is on first order pixel values statistics.