diff --git a/src/preamble/packages/ams.tex b/src/preamble/packages/ams.tex
index 85c267ef6ccae90169fdc2fb1d6076ee360873fa..4b2d980882532d6e4a6391145b5cacbf86909780 100644
--- a/src/preamble/packages/ams.tex
+++ b/src/preamble/packages/ams.tex
@@ -1,8 +1,14 @@
 %! Author = lorenzo
-%! Date = 13/02/22
+%! Date = 15/09/22
 
 \usepackage{amsmath,amsthm} % per la matematica estesa
+%% NON USARE LE MACRO \math.., MA \sym..
 \usepackage[math-style=ISO]{unicode-math}% per la matematica UNICODE
 
-\setmathfont{XITS Math}% font matematici UNICODE che van bene con i Times
-\setmathfont[range={\mathcal,\mathbfcal},StylisticSet=1,partial=upright]{XITS Math}
\ No newline at end of file
+\def\corrxits#1{\expanded{\Umathstackdenomdown#1=\the\Umathfractiondenomdown#1}\relax}
+
+\AtBeginDocument{
+	% see https://tex.stackexchange.com/a/120070
+	\setmathfont{XITS Math}[partial=upright]% font matematici UNICODE che van bene con i Times. Base math font.
+	\setmathfont{XITS Math}[range={cal,bfcal},StylisticSet=1]% enable calligraphic font for XITS Math.
+}