Hello Pedro, that is more a matter of your compiler and your system than of GiNaC. Since you are on ubunte and ginac.h is already in /usr/include/..., the program can be compiled with     g++ program.cpp -lginac (-lginac tells the linker to load the library). However, your program has an error, since poly is not defined. Add ex poly; above your for-loop, then it runs fine. Kind regards, Patrick On 3/13/19 4:30 PM, Pedro Sosa via GiNaC-list wrote:

Hello, I install in my Ubuntu Ginac but I don't know how to compile a basic example

#include <iostream> #include <ginac/ginac.h> using namespace std; using namespace GiNaC;

int main() { symbol x("x"), y("y");

for (int i=0; i<3; ++i) poly += factorial(i+16)*pow(x,i)*pow(y,2-i);

cout << poly << endl; return 0; }

where I must put this file for ginac.h can be visible thanks

PS: /usr/include/ginac/ginac.h

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On Wed, 13 Mar 2019 15:30:56 +0000 (UTC), Pedro Sosa via GiNaC-list <ginac-list@ginac.de> said:

PS> Hello, I install in my Ubuntu Ginac but I don't know how to PS> compile a basic example #include <iostream> #include PS> <ginac/ginac.h> using namespace std; using namespace GiNaC; PS> int main() { symbol x("x"), y("y"); PS> for (int i=0; i<3; ++i) poly += PS> factorial(i+16)*pow(x,i)*pow(y,2-i); PS> cout << poly << endl; return 0; } where I must put this PS> file for ginac.h can be visiblethanks PS: PS> /usr/include/ginac/ginac.h You need to add the declaration: ex poly; After that try to compile your code with the command: g++ -lginac test.cpp -o test It works on my Debian system. -- Vladimir V. Kisil http://www.maths.leeds.ac.uk/~kisilv/ Book: Geometry of Mobius Transformations http://goo.gl/EaG2Vu Software: Geometry of cycles http://moebinv.sourceforge.net/