I have a document which includes the following expression: 
Can anyone identify the font or symbols used for the D and T characters at all?
I don't have the source LaTeX and need to reproduce this expression exactly.
I have a document which includes the following expression: 
Can anyone identify the font or symbols used for the D and T characters at all?
I don't have the source LaTeX and need to reproduce this expression exactly.
\mathcal{D}and\mathsf{T}no? – Au101 Feb 18 '16 at 00:07\mathsf{},\mathcal{}requires theamssymbpackage, although I confess that D looks a teeny tiny bit different to what I'm seeing, there may be a global change – Au101 Feb 18 '16 at 00:11\usepackage{amsmath} Let $\mathcal{D} = \{ \mathsf{T}_1, \mathsf{T}_2, \dots, \mathsf{T}_D \}$ \ldotsproduces this... – Werner Feb 18 '16 at 00:11