From 5fe7c81f93b45f8f85ca01c15ac06cf7cb2d1a4e Mon Sep 17 00:00:00 2001
From: Constantine Evans <const@costi.eu>
Date: Tue, 28 Dec 2021 11:33:21 +0000
Subject: [PATCH] Modernize latex greek math handling (partially fixes #1673)
 (#1687)

---
 .../nbconvert/templates/latex/base.tex.j2     | 23 ++++++++++++-------
 1 file changed, 15 insertions(+), 8 deletions(-)

diff --git a/share/jupyter/nbconvert/templates/latex/base.tex.j2 b/share/jupyter/nbconvert/templates/latex/base.tex.j2
index ce28fcb79..a6d2a5a27 100644
--- a/share/jupyter/nbconvert/templates/latex/base.tex.j2
+++ b/share/jupyter/nbconvert/templates/latex/base.tex.j2
@@ -14,13 +14,6 @@ override this.-=))
     ((* block docclass *))\documentclass[11pt]{article}((* endblock docclass *))
 
     ((* block packages *))
-    \usepackage{iftex}
-    \ifPDFTeX
-    	\usepackage[T1]{fontenc}
-    	\usepackage{mathpazo}
-    \else
-    	\usepackage{fontspec}
-    \fi
 
     % Basic figure setup, for now with no caption control since it's done
     % automatically by Pandoc (which extracts ![](path) syntax from Markdown).
@@ -48,7 +41,21 @@ override this.-=))
     }
     \usepackage{upquote} % Upright quotes for verbatim code
     \usepackage{eurosym} % defines \euro
-    \usepackage[mathletters]{ucs} % Extended unicode (utf-8) support
+
+    \usepackage{iftex}
+    \ifPDFTeX
+        \usepackage[T1]{fontenc}
+        \IfFileExists{alphabeta.sty}{
+              \usepackage{alphabeta}
+          }{
+              \usepackage[mathletters]{ucs}
+              \usepackage[utf8x]{inputenc}
+          }
+    \else
+        \usepackage{fontspec}
+        \usepackage{unicode-math}
+    \fi
+
     \usepackage{fancyvrb} % verbatim replacement that allows latex
     \usepackage{grffile} % extends the file name processing of package graphics 
                          % to support a larger range