thedeemon: (office)
[personal profile] thedeemon
"a Zeno Machine: a machine similar to a Turing machine except that the first instruction takes one second to compete, and each following instruction takes half of what the previous instruction took.
We could know whether a program halts or not in at most two seconds!"
(src)

Date: 2014-08-14 02:42 pm (UTC)
From: [identity profile] juan-gandhi.livejournal.com
Won't be able to count real numbers anyway.

Date: 2014-08-14 04:41 pm (UTC)
From: [identity profile] dmytrish.livejournal.com
It's a pretty nice example of http://en.wikipedia.org/wiki/Hypercomputation

Date: 2014-08-14 09:09 pm (UTC)
From: [identity profile] kodt-rsdn.livejournal.com
Крэй-1 через две секунды остановится и что, ещё четыре секунды будет тупить?

И что, вообще, произойдёт спустя 2 секунды - машина начнёт уничтожать информацию?

Date: 2014-08-15 04:12 am (UTC)
From: [identity profile] thedeemon.livejournal.com
Cray-1 мог быть устроен иначе.

А что после 2 секунд - хороший вопрос, сам не знаю. :)

Date: 2014-08-18 09:01 am (UTC)
From: [identity profile] sassa-nf.livejournal.com
поглотит всю энергию вселенной, конечно же!

Date: 2014-08-18 02:30 pm (UTC)
From: [identity profile] thedeemon.livejournal.com
Не, это будет сделано раньше - при строительстве машины с бесконечной лентой.

Date: 2014-08-18 02:53 pm (UTC)
From: [identity profile] sassa-nf.livejournal.com
нормальные реализации достраивают ленту as needed :)

Date: 2014-08-14 09:31 pm (UTC)
From: [identity profile] 109.livejournal.com
actually, we won't. in 2 seconds the program will be able to run infinite number of steps, so we still won't know whether it is halted or not.

Date: 2014-08-15 04:07 am (UTC)
From: [identity profile] thedeemon.livejournal.com
Either it comes to the end state or not, it will be evident after 2 seconds in any case.

Turing machine has one or several "final states" where it stops. We can light a bulb when it comes to one of these states. So after 2 seconds the bulb is either on or off.
Edited Date: 2014-08-15 04:10 am (UTC)

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