Inverting is a means of hiding weaves of the One Power. An inverted weave is manipulated such that only the channeler that wove it can detect it.[1]
It is first seen taught by Asmodean[2] to Rand al'Thor, when he goes back to the Stone of Tear and inverts his weaves around Callandor. [3]
Moghedien, while trapped and collared by the a'dam, teaches Elayne and Nynaeve how to invert their weaves.[4] They teach Egwene who in turn teaches the rest of the Aes Sedai in Salidar.[5] Cadsuane had learned inversion sometime before the Battle near Shadar Logoth.[6]