Q.real(x) does not lead to Q.finite(x) being true

[oscargus]

It may be that I have no idea about how the assumption system is supposed to work, but I was under the impression that ask(Q.finite(x), Q.real(x)) should evaluate to True.

[jksuom]

It looks like the implication Q.finite(x) | ~Q.real(x) is missing from known facts:

sympy/sympy/assumptions/ask_generated.py

Lines 28 to 31 in 26aa686

	Q.finite | ~Q.algebraic,
	Q.finite | ~Q.irrational,
	Q.finite | ~Q.rational,
	Q.finite | ~Q.transcendental,

[oscargus]

Yes, that was my conclusion as well. That is Implies(Q.real, Q.finite), right?

[jksuom]

I think so. In ask.py. Then ask_generated.py will have to be regenerated.

[oscarbenjamin]

I think I thought this was already the case in the new assumptions. Yes that implication should be added and then ask_generated should be rebuilt.