- introduced checks that test the new logic of sin, cos and tan to control

[ginac.git] / check / differentiation.cpp

diff --git a/check/differentiation.cpp b/check/differentiation.cpp
index 611342d0cdfc9a9ce9ef5170dde5314c5cd154fa..ece8bc376eb4ce9d70bb952d8afe2c517b218e57 100644 (file)
--- a/check/differentiation.cpp
+++ b/check/differentiation.cpp
@@ -21,13 +21,16 @@
  */
 
 #include <ginac/ginac.h>
+
+#ifndef NO_GINAC_NAMESPACE
 using namespace GiNaC;
+#endif // ndef NO_GINAC_NAMESPACE
 
 static unsigned check_diff(const ex &e, const symbol &x,
                            const ex &d, unsigned nth=1)
 {
     ex ed = e.diff(x, nth);
-    if ((ed - d).compare(exZERO()) != 0) {
+    if ((ed - d).compare(ex(0)) != 0) {
         switch (nth) {
         case 0:
             clog << "zeroth ";
@@ -234,10 +237,16 @@ static unsigned differentiation5(void)
          pow(y*b+pow(y,2)*x+a,-2)*pow(y,2))*
         pow(1+pow(a*x+b+y*pow(x,2),2)*pow(y*b+pow(y,2)*x+a,-2),-1);
     */
+    /*
     d = pow(1+pow(a*x+b+y*pow(x,2),2)*pow(y*b+pow(y,2)*x+a,-2),-1)
         *pow(y*b+pow(y,2)*x+a,-1)*(a+2*y*x)
         +pow(y,2)*(-a*x-b-y*pow(x,2))*
         pow(pow(y*b+pow(y,2)*x+a,2)+pow(a*x+b+y*pow(x,2),2),-1);
+    */
+    d = pow(y,2)*pow(pow(b+y*pow(x,2)+x*a,2)+pow(y*b+pow(y,2)*x+a,2),-1)*
+        (-b-y*pow(x,2)-x*a)+
+        pow(pow(b+y*pow(x,2)+x*a,2)+pow(y*b+pow(y,2)*x+a,2),-1)*
+        (y*b+pow(y,2)*x+a)*(2*y*x+a);
     result += check_diff(e, x, d);
     
     return result;
@@ -249,13 +258,13 @@ static unsigned differentiation6(void)
     symbol x("x");
     ex e, d, ed;
     
-    e = sin(x).series(x, exZERO(), 8);
-    d = cos(x).series(x, exZERO(), 7);
+    e = sin(x).series(x, 0, 8);
+    d = cos(x).series(x, 0, 7);
     ed = e.diff(x);
     ed = static_cast<series *>(ed.bp)->convert_to_poly();
     d = static_cast<series *>(d.bp)->convert_to_poly();
     
-    if ((ed - d).compare(exZERO()) != 0) {
+    if ((ed - d).compare(ex(0)) != 0) {
         clog << "derivative of " << e << " by " << x << " returned "
              << ed << " instead of " << d << ")" << endl;
         return 1;