metric tensor arithmetic explanation<div dir="auto"><br></div><div dir="auto"><div><a href="https://chatgpt.com/share/670322bb-8518-800e-b440-04f1f3dd8ebb">https://chatgpt.com/share/670322bb-8518-800e-b440-04f1f3dd8ebb</a></div><br></div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><br></div>