mcdutchie, 10 months ago @transponderings @padraig @Gwendolyn It is part of many fonts, being a standard Unicode character: 𝕏, the "mathematical double-struck capital X" (U+1D54F).
@transponderings @padraig @Gwendolyn It is part of many fonts, being a standard Unicode character: 𝕏, the "mathematical double-struck capital X" (U+1D54F).