Talk:Test integerness: Difference between revisions

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Revision as of 21:16, 5 August 2015 (view source) rosettacode>Brnikat m (Fix tyop) ← Older edit		Latest revision as of 21:54, 3 December 2016 (view source) Hout (talk \| contribs) (→‎Number set symbols not visible to most browsers)
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Line 27: :: --[[User:Paddy3118\|Paddy3118]] ([[User talk:Paddy3118\|talk]]) 16:11, 25 June 2014 (UTC) : Mathematicians define a complex number (an element of the field '''C''') as an ordered pair ~~of elements~~ (''re'', ''im'') where ''re'' and ''im'' are elements of the field '''R''', the real numbers. An ordered pair of elements is quite distinct from a single element. : If you wish to test whether a complex number is an integer you also need to be careful to state what you mean by that term. A complex integer, more usually termed a ''Gaussian integer'' or an element of the ring '''Z'''[''i''], ~~the Gaussian integers~~ is an ordered pair of elements (''re'', ''im'') of the ring '''Z''', the ring of integers. The ~~subset~~sub-ring which has ''im'' = 0 is isomorphic to '''Z'''. My ''guess'' is that the latter set is what is meant when the task is extended to treat complex numbers but this should be made explicit. : --[[User:Brnikat\|Brnikat]] ([[User talk:Brnikat\|talk]]) 21:15, 5 August 2015 (UTC) ==Number set symbols not visible to most browsers== Browsers which display a graphic file (rather than locally processed MathML and local fonts) for the content of <math> tags are not displaying number set symbols on the task page, because the MediaWiki processor is choking on unexpected input and generating syntactically ill-formed HTML tags (in which a semi-colon is missing between the height and vertical-align attributes). May be worth further investigation and testing of the expectations of the MediaWiki processor here. [[User:Hout\|Hout]] ([[User talk:Hout\|talk]]) 19:25, 21 September 2016 (UTC) :No obvious permutations of '''<math>''' tag expressions achieve display of number set symbols on these MediaWiki pages in the majority of browsers at the moment (Chrome, IE/Edge, Safari, Opera etc, i.e. the browsers which display the font-independent server-side graphic) (Subject to installation of necessary fonts, it may be possible in Firefox, which uses local font-dependent processing of MathML). :Future changes in the MediaWiki HTML generator may enable display of number set symbols in most browsers, but in the meanwhile, I suggest that we adopt the approach used in some of the discussion above, and replace the blank gaps in the task description with bold capitals like '''Z''', '''Q''', '''R''', '''C'''. [[User:Hout\|Hout]] ([[User talk:Hout\|talk]]) 12:52, 2 December 2016 (UTC) :: This change has now been made (using symbol bold caps for number set symbols – this makes them visible in the majority of browsers. They were previously hidden to Chrome, IE/Edge, Safari, Opera etc)