예제 #1
0
def eq1():
    r = Symbol("r")
    e = relativity.Rmn.dd(0,0)
    e = e.subs(relativity.nu(r), -relativity.lam(r))
    print dsolve(e, [relativity.lam(r)])
예제 #2
0
def eq2():
    r = Symbol("r")
    e = relativity.Rmn.dd(1,1)
    C = Symbol("CC")
    e = e.subs(relativity.nu(r), -relativity.lam(r))
    print dsolve(e, [relativity.lam(r)])