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Revision History for A083729

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Showing entries 1-10 | older changes

A083729

Decimal expansion of sqrt(2)/(sqrt(2)-1)^2 = 3*sqrt(2)+4.
(history; published version)

#29 by Charles R Greathouse IV at Thu Sep 08 08:45:10 EDT 2022

PROG

(MAGMAMagma) SetDefaultRealField(RealField(100)); 4 + 3*Sqrt(2); // G. C. Greubel, Sep 11 2018

Discussion

Thu Sep 08

08:45

OEIS Server: https://oeis.org/edit/global/2944

#28 by Alois P. Heinz at Mon Oct 04 17:37:10 EDT 2021

STATUS

proposed

approved

#27 by Sean A. Irvine at Mon Oct 04 16:06:19 EDT 2021

STATUS

editing

proposed

#26 by Sean A. Irvine at Mon Oct 04 16:06:11 EDT 2021

FORMULA

Equals Sum_{i>=1} of i/sqrt(2)^i. - Christoph B. Kassir, Aug 30 2021

STATUS

proposed

editing

#25 by Michel Marcus at Tue Aug 31 03:17:11 EDT 2021

STATUS

editing

proposed

Discussion

Tue Aug 31

04:19

Hugo Pfoertner: Inferior? 100 digits with the suminf take 16 ms. The argument is not the low efficiency, which is completely negligible, but that we do not need a separate program for every alternative representation.

05:56

Kevin Ryde: Yes code should pick from among formulas the best way, and do that.  (And naturally in a way which is certain to come out correct digits.)

#24 by Michel Marcus at Tue Aug 31 03:17:06 EDT 2021

CROSSREFS

Cf. A010474, A072449.

STATUS

proposed

editing

#23 by Joerg Arndt at Tue Aug 31 03:15:07 EDT 2021

STATUS

editing

proposed

#22 by Joerg Arndt at Tue Aug 31 03:15:04 EDT 2021

PROG

(PARI) suminf(i=1, i/sqrt(2)^i) \\ Christoph B. Kassir, Aug 30 2021

STATUS

proposed

editing

#21 by Michel Marcus at Mon Aug 30 11:55:10 EDT 2021

STATUS

editing

proposed

Discussion

Mon Aug 30

20:25

Kevin Ryde: No to a pari code like that, since inferior to the existing code.

#20 by Michel Marcus at Mon Aug 30 11:54:58 EDT 2021

FORMULA

Equals Sum_{i>=1..oo} of i/sqrt(2)^i. - Christoph B. Kassir, Aug 30 2021

PROG

(PARI) suminf(i=1, i/sqrt(2)^i) \\ Christoph B. Kassir, Aug 30 2021

(PARI) suminf(i=1, i/sqrt(2)^i) \\ - Christoph B. Kassir, Aug 30 2021

STATUS

proposed

editing

Discussion

Mon Aug 30

11:55

Michel Marcus: pari programs together