I want to obtain the following symbol for denoting the Siegel upper-half space. The picture is as follows:
I have checked the PDF document The comprehensive LATEX symbol list, but I could not find out what I want to look for.
I do not know what is the font type of this symbol, I guess it belongs to some German-Goth style. Anyway I am not sure.
Any suggestions are appreciated, and thanks in advance.

\mathfrak{H}and\mathfrak{I}? Looks likeeuler, https://i.stack.imgur.com/980yM.jpg – Troy Jul 27 '17 at 10:51\usepackage{amsfonts}or\usepackage{amssymb}. – egreg Jul 27 '17 at 10:53