The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A245592 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A245592

Decimal expansion of the Ising constant K_c, the ratio of the coupling constant to the ferromagnetic critical temperature, in the two-dimensional case.
(history; published version)

#29 by Joerg Arndt at Fri Feb 09 03:26:19 EST 2024

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reviewed

approved

#28 by Michel Marcus at Fri Feb 09 02:57:04 EST 2024

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proposed

reviewed

#27 by Amiram Eldar at Fri Feb 09 02:45:19 EST 2024

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editing

proposed

#26 by Amiram Eldar at Fri Feb 09 02:39:05 EST 2024

LINKS

Wikipedia, <a href="http://en.wikipedia.org/wiki/Ising_model">Ising Model</a>.

FORMULA

Equals arctanh(sqrt(2)-1). - Amiram Eldar, Feb 09 2024

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approved

editing

#25 by Peter Luschny at Tue Oct 29 14:11:41 EDT 2019

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editing

approved

#24 by Peter Luschny at Tue Oct 29 14:11:31 EDT 2019

FORMULA

Equals arcsinh(1)/2. - Peter Luschny, Oct 29 2019

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proposed

editing

#23 by Michel Marcus at Tue Oct 29 11:10:55 EDT 2019

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editing

proposed

#22 by Michel Marcus at Tue Oct 29 11:10:51 EDT 2019

REFERENCES

Okounkov, Andrei. "Limit shapes, real and imagined." Bulletin of the American Mathematical Society (2015). Vol. 53, No. 2, pp. 187-210.

LINKS

Andrei Okounkov, <a href="https://doi.org/10.1090/bull/1512">Limit shapes, real and imagined</a>, Bull. Amer. Math. Soc. 53 2 (2016), 187-216

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proposed

editing

#21 by Peter Bala at Tue Oct 29 10:55:51 EDT 2019

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editing

proposed

#20 by Peter Bala at Mon Oct 28 07:48:04 EDT 2019

FORMULA

Equals Integral_{0..1} x/sqrt(1 + x^4) dx. - Peter Bala, Oct 28 2019

STATUS

approved

editing