Re: [math-fun] Math-Fun topics
Should be safe. Most of the antinukes have switched to you-know-what. Won't the next breakthrough be quantum computing? If it works. --rwg On 2018-03-02 09:44, Eugene Salamin via math-fun wrote:
Surely discussion of nuclear reactors should be an allowed math-fun topic.
-- Gene
On Friday, March 2, 2018, 9:28:38 AM PST, Richard Howard <rich@richardehoward.com> wrote:
Sorry about that--will do.
There is the slight twist in that I was trying to respond to the issue of *new technologies* that are down the road. Leaving out geoengineering or pocket nuclear reactors and including Bitcoin seems to be leaving the elephant in the living room from the "technology" point of view.
Adversarial AI is ok, though--right?
--R
On Fri, Mar 2, 2018 at 11:35 AM, <rcs@xmission.com> wrote:
We've had some new folks join us recently, who might be unaware of some of my arbitrary rules.
The topics of politics and global warming are banned.
Rich
True, AI and quantum computing are natural allies--real world fuzzy. Use for problems where "good enough" is good enough. --R On Sat, Mar 3, 2018 at 12:51 PM, Bill Gosper <billgosper@gmail.com> wrote:
Should be safe. Most of the antinukes have switched to you-know-what.
Won't the next breakthrough be quantum computing? If it works. --rwg
On 2018-03-02 09:44, Eugene Salamin via math-fun wrote:
Surely discussion of nuclear reactors should be an allowed math-fun topic.
-- Gene
On Friday, March 2, 2018, 9:28:38 AM PST, Richard Howard <rich@richardehoward.com> wrote:
Sorry about that--will do.
There is the slight twist in that I was trying to respond to the issue of *new technologies* that are down the road. Leaving out geoengineering or pocket nuclear reactors and including Bitcoin seems to be leaving the elephant in the living room from the "technology" point of view.
Adversarial AI is ok, though--right?
--R
On Fri, Mar 2, 2018 at 11:35 AM, <rcs@xmission.com> wrote:
We've had some new folks join us recently, who might be unaware of some of my arbitrary rules.
The topics of politics and global warming are banned.
Rich
math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
The *mathematical* breakthrough of quantum computing has already happened; we're just waiting for a few *engineering* breakthroughs. On the other hand, HoTT is still incomplete: the dream is to be able to add univalence and higher inductive types to Martin-Lof type theory and still retain the property of being able to normalise every term. Cubical type theory is a step in the correct direction, but it's still unknown which higher inductive types can be implemented in this theory.
Won't the next breakthrough be quantum computing? If it works. --rwg
On 2018-03-02 09:44, Eugene Salamin via math-fun wrote:
Surely discussion of nuclear reactors should be an allowed math-fun topic.
-- Gene
On Friday, March 2, 2018, 9:28:38 AM PST, Richard Howard <rich@richardehoward.com> wrote:
Sorry about that--will do.
There is the slight twist in that I was trying to respond to the issue of *new technologies* that are down the road. Leaving out geoengineering or pocket nuclear reactors and including Bitcoin seems to be leaving the elephant in the living room from the "technology" point of view.
Adversarial AI is ok, though--right?
--R
On Fri, Mar 2, 2018 at 11:35 AM, <rcs@xmission.com> wrote:
We've had some new folks join us recently, who might be unaware of some of my arbitrary rules.
The topics of politics and global warming are banned.
Rich
math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
_______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
https://physics.aps.org/articles/v11/22?utm_campaign=weekly&utm_medium=email... Clock consists of 10,000 Sr atoms in an optical lattice cooled to 15 nK. If this clock had been started at the big bang, it would today be off by 100 ms. == Gene
next major advance might be a nuclear clock using 229mTh. Wiki: "229mTh has the lowest known excitation energy of any isomer,[21] measured to be 7.6 ± 0.5 eV. This is so low that when it undergoes isomeric transition, the emitted gamma radiation is in the ultraviolet range". It would be vacuum UV at 160 nm. As in https://arxiv.org/abs/1709.05325. I couldn't find an estimate of the expected line width or accuracy improvement though. Wouter. -----Original Message----- From: Eugene Salamin via math-fun Sent: Tuesday, March 06, 2018 2:10 AM To: math-fun@mailman.xmission.com Subject: [math-fun] Atomic clock at precision 2.5e-19 https://physics.aps.org/articles/v11/22?utm_campaign=weekly&utm_medium=email... Clock consists of 10,000 Sr atoms in an optical lattice cooled to 15 nK. If this clock had been started at the big bang, it would today be off by 100 ms. == Gene _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
How long after the big bang before this clock could have existed? More than 100 ms I'll wager. :-) On Mon, Mar 5, 2018 at 8:10 PM, Eugene Salamin via math-fun < math-fun@mailman.xmission.com> wrote:
https://physics.aps.org/articles/v11/22?utm_campaign= weekly&utm_medium=email&utm_source=emailalert
Clock consists of 10,000 Sr atoms in an optical lattice cooled to 15 nK. If this clock had been started at the big bang, it would today be off by 100 ms.
== Gene
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participants (6)
-
Adam P. Goucher -
Bill Gosper -
Eugene Salamin -
Richard Howard -
W. Edwin Clark -
Wouter Meeussen