Zothecula writes: Iranian State TV on Saturday showed an unveiling ceremony for what the Iran Defense Ministry claims is a new Iranian designed and built combat aircraft. Defense Minister Ahmad Vahidi said the single-seat Qaher F-313 (Dominant F-313) can operate at low altitudes and was constructed from “advanced materials” that contribute to the aircraft’s “very low radar cross section.” Link to Original Source
We warn the reader in advance that the proof presented here depends on a
clever but highly unmotivated trick.
-- Howard Anton, "Elementary Linear Algebra"