from the peekaboo-the-van-sees-you dept.
bizwriter writes "When it comes to knowing where wireless users are, the carriers have had a lock on the data. But a patent application shows that Google is trying to deduce the information based on packet headers and estimated transmission rates. This would let it walk right around carriers and become another source of location data to advertisers."
We warn the reader in advance that the proof presented here depends on a
clever but highly unmotivated trick.
-- Howard Anton, "Elementary Linear Algebra"