Talk:Sequence of non-squares: Difference between revisions

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rosettacode>Gerard Schildberger

Revision as of 06:17, 16 June 2011 (view source) Toucan (talk \| contribs) No edit summary ← Older edit		Latest revision as of 21:45, 27 January 2017 (view source) rosettacode>Gerard Schildberger (added a section name to the first statement as a way to force the TOC to be in the proper place.)
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Line 1: == chose a way to investigate functions == I chose this as a way to show how easy it is to investigate functions in a programming language. --[[User:Paddy3118\|Paddy3118]] 08:42, 24 August 2008 (UTC) == Stability, Accuracy == The formula need to be investigated for numeric stability. Calculation of sqrt is inexact, it need to be shown that for all n in question, floor(1/2 + sqrt(n)) yields the exact result. A minimal requirement for this (though insufficient, I guess) is that sqrt has an error below 0.5. Note that the addition following to squaring will normalize for big n. Also conversion of those to floating point becomes quickly inexact when 32-bit floats are used. --[[User:Dmitry-kazakov\|Dmitry-kazakov]] 09:51, 24 August 2008 (UTC) Line 78 ⟶ 80: :::::Ah, <i>that</i>'s what you meant, that the sequence should contain ALL non-squares. I'm not sure if the task did ask that, maybe the author should clarify. --[[User:Ledrug\|Ledrug]] 05:01, 16 June 2011 (UTC) ::::::The task asks for the ''sequence of non-square natural numbers''. If in doubt, it even gives a link to OEIS sequence A000037. It's not really bad to check that there are no squares in this sequence, but it would be better to check that all non-squares are here. Since it's not difficult to do, there is no reason no to do it I think. [[User:Toucan\|Toucan]] 06:14, 16 June 2011 (UTC) :::::::(There is even a link explaining the natural numbers too). --[[User:Paddy3118\|Paddy3118]] 06:28, 16 June 2011 (UTC) :::::::With over fifty examples, it is too late to mess around with the task goals, although I probably did miss the chance to ensure that the non-square naturals are represented up to a limit. --[[User:Paddy3118\|Paddy3118]] 06:28, 16 June 2011 (UTC) ::::::::Ok, no problem ;-) [[User:Toucan\|Toucan]] 08:53, 16 June 2011 (UTC)