strange issue with latex printing

[Amine Aboufirass]

I want to differentiate an expression as follows in `sympy`. I am using `jupyter qtconsole` with enabled latex:

    from sympy import *

    init_printing()

    p0,nu,lamb,k,epsp, dp0 = symbols(r'p_0, nu, lambda, kappa, \delta\epsilon_p^p, \deltap_0')

    test = Eq(epsp,((lamb-k)/nu)*dp0/p0)

    p0expr = solve(test,p0)[0]

    diff(p0expr, epsp)

    diff(p0expr,k)

    diff(p0expr,lamb)

I'd like to focus on the last three lines of code, lines 6, 7 and 8. Lines 7 and 8 output latex style output while line 6 does not. Why does line 6 not get output in latex? This makes no sense to me could anyone please explain?

[Amine Aboufirass]

Does anyone know why this is happening... 

[Jason Moore]

I'm not able to get rendered LaTeX output in the qtconsole 4.3.1 at all.

moorepants.info
+01 530-601-9791

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[Jason Moore]

If you print dp0 you'll see that it doesn't properly render. Maybe it is invalid LaTeX.

moorepants.info
+01 530-601-9791