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LWN.net Weekly Edition for May 16, 2013
A look at the PyPy 2.0 release
PostgreSQL 9.3 beta: Federated databases and more
LWN.net Weekly Edition for May 9, 2013
(Nearly) full tickless operation in 3.10
Although mathematically I think this is correct, I'd hate to see the legal precedent an argument like that would make for an already horrible patent system...
I can just see the next headlines "Judge rules that a point is a zero-length line - torrent of patent lawsuits follow..."
Famous judge spikes Apple-Google case (GigaOm)
Posted Jun 8, 2012 19:27 UTC (Fri) by marduk (subscriber, #3831)
Posted Jun 8, 2012 20:24 UTC (Fri) by bronson (subscriber, #4806)
Besides you'd never say "click on this zero-length line segment". Using language like that implies someone's stretching the facts to try to fit their argument.
And that's the judge's point.
Posted Jun 8, 2012 23:39 UTC (Fri) by dskoll (subscriber, #1630)
A line cannot be zero-length. By definition, a line is infinitely long.
A line segment has length. But according to the PlanetMath definition someone else posted, it can't have zero length.
Posted Jun 9, 2012 8:20 UTC (Sat) by dgm (subscriber, #49227)
Posted Jun 10, 2012 6:57 UTC (Sun) by jd (guest, #26381)
Posted Jun 10, 2012 17:48 UTC (Sun) by apoelstra (subscriber, #75205)
But in all seriousness, even professional mathematicians use the words "line" and "line segment" interchangeably, since (a) in most contexts there is no ambiguity, and (b) if there is ambiguity, much more would need to be specified -- the space under consideration, whether the segments had open or closed endpoints, etc.
Posted Jun 16, 2012 23:06 UTC (Sat) by jtc (subscriber, #6246)
It's not true because a tap has duration - small, perhaps, compared to a swipe; but if it had no duration the device would not be able to detect it - i.e., it would not exist, it would be a <nothing>, not a tap.
Posted Jun 16, 2012 23:36 UTC (Sat) by dlang (✭ supporter ✭, #313)
for a tap, many of these values are zero, but you can encapsulate a tap into a swipe, if you really want to.
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