From 840d294a4a1e0c4286b162007f49a8233350a9c2 Mon Sep 17 00:00:00 2001
From: Julian Weigt <juw@posteo.de>
Date: Fri, 20 Feb 2026 15:23:26 +0100
Subject: Change double to long double because numbers get too big for high
 derivatives.

---
 double.h | 43 +++++++++++++++++++++++--------------------
 1 file changed, 23 insertions(+), 20 deletions(-)

(limited to 'double.h')

diff --git a/double.h b/double.h
index 032d994..6678ba6 100644
--- a/double.h
+++ b/double.h
@@ -3,44 +3,47 @@
 
 #include <stdbool.h>
 
-double int_to_valuetype(int);
+typedef long double vtype;
+typedef long double etype;
 
-double int_to_exptype(double);
+vtype int_to_valuetype(int);
 
-double infinity_to_exptype();
+etype int_to_exptype(int);
 
-bool exptype_is_infinite(double);
+vtype infinity_to_exptype();
 
-bool is_greater_certainly(double,double);
+bool exptype_is_infinite(vtype);
 
-bool is_greater_possibly(double,double);
+bool is_greater_certainly(vtype,vtype);
 
-double maximum(double,double);
+bool is_greater_possibly(vtype,vtype);
 
-double sum(double,double);
+vtype maximum(vtype,vtype);
 
-double difference(double,double);
+vtype sum(vtype,vtype);
 
-double product(double,double);
+vtype difference(vtype,vtype);
 
-double ratio(double,double);
+vtype product(vtype,vtype);
 
-double absolute(double);
+vtype ratio(vtype,vtype);
 
-double power(double,double);
+vtype absolute(vtype);
 
-double valuetype_to_double(double);
+vtype power(vtype,vtype);
 
-int exptype_to_string(char*,double);
+double valuetype_to_double(vtype);
 
-int exptype_to_latex(char*,double);
+int exptype_to_string(char*,vtype);
 
-int valuetype_to_string(char*,double);
+int exptype_to_latex(char*,vtype);
 
-int valuetype_to_latex(char*,double);
+int valuetype_to_string(char*,vtype);
 
-int root_to_string(char*,double,double);
+int valuetype_to_latex(char*,vtype);
 
-int root_to_latex(char*,double,double);
+int root_to_string(char*,vtype,etype);
+
+int root_to_latex(char*,vtype,etype);
 
 #endif
-- 
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