On 24.03.2013 15:17, Hans Hagen wrote: > On 3/24/2013 12:23 PM, Otared Kavian wrote: >> >> On 24 mars 2013, at 11:24, Hans Hagen <pra...@wxs.nl> wrote: >> >>> On 3/23/2013 9:34 PM, Xenia wrote: >>>> Dear context list, >>>> >>>> using the nabla symbol ∇ in formulas, I wondered why it looks italic >>>> and >>>> not upright as for example in [1]. >>>> I attach an example. >>> >>> Because that's how it's defined in math italics ... is nabla always >>> supposed to be upright in standard math italic mode? >>> >>> (I'll change the \nable definition to \unexpanded\def\nabla{∇}.) >>> >>> Hans >> >> Hi, >> >> \nabla should be italic if all other math greek symbols, like \Omega, >> \Gamma, \sum, ect are set in italic. Otherwise \nabla and all such >> symbols should be upright. >> Would it be possible to make this optional in math italics, something >> like >> \setupmathematics[mathsymbols=italic] >> or >> \setupmathematics[mathsymbols=upright] >> Maybe this should be set when one chooses the greek letters to be >> italic or upright in mathematics. > > That is already there > > \setupmathematics > [lcgreek=italic, > ucgreek=normal] > > (normal, italic, none) > > I've added sygreek so that one can also influence the nable and > differential (default normal). I tested with: > > \starttext > \startTEXpage > \startlines > \type{--}: \mathematics{ \nabla \phi = ∇ ϕ = 0} > \type{it}: \mathematics{\it \nabla \phi = ∇ ϕ = 0} > \type{bf}: \mathematics{\bf \nabla \phi = ∇ ϕ = 0} > \type{bi}: \mathematics{\bi \nabla \phi = ∇ ϕ = 0} > \type{tf}: \mathematics{\tf \nabla \phi = ∇ ϕ = 0} > \blank > \type{--}: \mathematics{ \mathgreekupright \nabla \phi = > ∇ ϕ = 0} > \type{it}: \mathematics{\it \mathgreekupright \nabla \phi = > ∇ ϕ = 0} > \type{bf}: \mathematics{\bf \mathgreekupright \nabla \phi = > ∇ ϕ = 0} > \type{bi}: \mathematics{\bi \mathgreekupright \nabla \phi = > ∇ ϕ = 0} > \type{tf}: \mathematics{\tf \mathgreekupright \nabla \phi = > ∇ ϕ = 0} > \blank > \setupmathematics[sygreek=italic] > \type{--}: \mathematics{ \nabla \phi = ∇ ϕ = 0} > \type{it}: \mathematics{\it \nabla \phi = ∇ ϕ = 0} > \type{bf}: \mathematics{\bf \nabla \phi = ∇ ϕ = 0} > \type{bi}: \mathematics{\bi \nabla \phi = ∇ ϕ = 0} > \type{tf}: \mathematics{\tf \nabla \phi = ∇ ϕ = 0} > \stoplines > \stopTEXpage > \stoptext
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