X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?a=blobdiff_plain;f=check%2Fexam_pseries.cpp;h=04b669e0724eb552b70499b3a1f4bc475564bd96;hb=d39db5674734029a7aa11ea4446fd8923d51ce0e;hp=e24ef414790e31a36e704e38bbb989ad35084123;hpb=c3c748381bda4f81b68e50db2eed440c19f24b85;p=ginac.git

diff --git a/check/exam_pseries.cpp b/check/exam_pseries.cpp
index e24ef414..04b669e0 100644
--- a/check/exam_pseries.cpp
+++ b/check/exam_pseries.cpp
@@ -3,7 +3,7 @@
  *  Series expansion test (Laurent and Taylor series). */
 
 /*
- *  GiNaC Copyright (C) 1999-2007 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2022 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -20,11 +20,12 @@
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#include <iostream>
 #include "ginac.h"
-using namespace std;
 using namespace GiNaC;
 
+#include <iostream>
+using namespace std;
+
 static symbol x("x");
 
 static unsigned check_series(const ex &e, const ex &point, const ex &d, int order = 8)
@@ -140,6 +141,10 @@ static unsigned exam_series1()
 	d = pow(a, b) + (pow(a, b)*b/a)*x + (pow(a, b)*b*b/a/a/2 - pow(a, b)*b/a/a/2)*pow(x, 2) + Order(pow(x, 3));
 	result += check_series(e, 0, d, 3);
 
+	e = a * (1 / (x * sin(x)) - sin(x) / x);
+	d = a * pow(x, -2) + Order(pow(x, -1));
+	result += check_series(e, 0, d, -1);
+
 	return result;
 }
 
@@ -172,6 +177,7 @@ static unsigned exam_series3()
 // Series exponentiation
 static unsigned exam_series4()
 {
+	using GiNaC::tgamma;
 	unsigned result = 0;
 	ex e, d;
 	
@@ -210,6 +216,7 @@ static unsigned exam_series5()
 // Series expansion of tgamma(-1)
 static unsigned exam_series6()
 {
+	using GiNaC::tgamma;
 	ex e = tgamma(2*x);
 	ex d = pow(x+1,-1)*numeric(1,4) +
 	       pow(x+1,0)*(numeric(3,4) -
@@ -327,6 +334,7 @@ static unsigned exam_series11()
 static unsigned exam_series12()
 {
 	using GiNaC::log;
+	using GiNaC::atanh;
 
 	unsigned result = 0;
 	ex e, d;
@@ -365,6 +373,23 @@ static unsigned exam_series13()
 	return result;
 }
 
+// Test if (1+x)^(1/x) can be expanded.
+static unsigned exam_series14()
+{
+	unsigned result = 0;
+
+	ex e = pow(1+x, sin(x)/x);
+	ex d = 1 + x - pow(x,3)/6 + Order(pow(x,4));
+	try {
+		result += check_series(e,0,d,4);
+	} catch (const pole_error& err) {
+		clog << "series expansion of " << e << " at 0 raised an exception." << endl;
+		++result;
+	}
+
+	return result;
+}
+
 unsigned exam_pseries()
 {
 	unsigned result = 0;
@@ -384,6 +409,7 @@ unsigned exam_pseries()
 	result += exam_series11();  cout << '.' << flush;
 	result += exam_series12();  cout << '.' << flush;
 	result += exam_series13();  cout << '.' << flush;
+	result += exam_series14();  cout << '.' << flush;
 	
 	return result;
 }