trac #15489: deprecate the dim argument for MIPVariables
trac #15489: rebase on 5.13.rc0
trac #15489: fix doctests and adds notes to remove code later
Trac 11239: fix coercion of polynomials over finite fields, first step
Trac 11239: fix coercion of polynomials over finite fields
trac #15489: Rebase on updated #15482
Trac 14403: always use a unique variable name
Trac 14403: expression to polynomial only for selected variables
Merge branch 'develop' into ticket/14403
Trac #9401: pari(n).isprime(1) does not give the primality certificate to the user
Trac #9401: use pari_catch_sig* and new_gen (pbruin's code in comment:7)

Also-By: Peter Bruin
gen.isprime: replace bool(s) by s != 0
implement and use PolynomialRingHomomorphism_from_base
doctest fixes
remove unused declaration from polynomial_ring_homomorphism.pxd
trac #15489: Rebase on 6.2.beta2
trac #15489: Docfix
distinguish between sparse and dense in PolynomialRingHomomorphism_from_base
Made sympify() in _ascii_art_ have evaluate=False.
Use evaluate=False in SympyConverter too