On 3/24/2013 12:23 PM, Otared Kavian wrote:
On 24 mars 2013, at 11:24, Hans Hagen
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 Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------