Various bugfixes and additions

eo/contrib/mathsym/test/test_mf.cpp

@@ -0,0 +1,45 @@
+
+#include "Sym.h"
+#include "MultiFunction.h"
+#include "FunDef.h"
+
+using namespace std;
+
+int main() {
+
+    Sym v = SymVar(0);
+    Sym c = SymConst(0.1);
+
+    Sym sym = inv(v) + c;
+    Sym a = sym;
+    
+    sym = sym * sym;
+    Sym b = sym;
+    sym = sym + sym;
+    
+    c = sym;
+    
+    vector<Sym> pop;
+    pop.push_back(sym);
+
+    MultiFunction m(pop);
+
+
+    vector<double> vec(1);
+    vec[0] = 10.0;
+    cout << sym << endl;
+
+    cout << "Eval " << eval(sym, vec);
+    
+    vector<double> y(1);
+
+    m(vec,y);
+
+    cout << " " << y[0] << endl;
+    
+    cout << "3 " << eval(a,vec) << endl;
+    cout << "4 " << eval(b, vec) << endl;
+    cout << "5 " << eval(c, vec) << endl;
+    
+}
+

eo/contrib/mathsym/test/test_simplify.cpp

@@ -13,6 +13,9 @@ int main() {
     
     cout << expr << endl;
     cout << simplify(expr) << endl;
-    
+
+    Sym dv = differentiate( exp(expr) , v1.token());
+    cout << dv << endl;
+    cout << simplify(dv) << endl;
 }