Every locally complete inductive limit of sequentially complete locally convex spaces , which satisfies Retakh's condition (M) is regular, sequentially complete and sequentially retractive. A quasiconverse for this theorem and a criterion for sequential retractivity of inductive limits of webbed spaces are given.

Advances in technology enable sellers to price discriminate based upon a customer’s revealed purchasing intentions. E-tailers can track items already in a “shopping cart” and item level RFID tags enable retailers to do the same in bricks and mortar stores. As retailers attempt to leverage the information made available from these technologies, it is important to understand how this new visibili...