Looks like a bug, can you open a ticket? On Monday 19 May 2014 19:13:55 Grégory Landais wrote: > Hello, > > evaluating a polynomial on a finite field does not work if the finite > field was created with a 'repr' argument in the constructor different > than the default one (poly). > > Curently using sage 6.1.1 on ubuntu 12.04 but same behaviour in 6.2. > > Here is the code that works : > > sage: F.<a>=GF(2**8) > sage: PR.<x>=PolynomialRing(F) > sage: f=PR.random_element(9) > sage: b=F.random_element() > sage: f(b) > a^6 + a^5 + a^4 + a^3 + a^2 + 1 > > > > > And the same code with the repr parameter changed (same behaviour with > repr="int") : > > sage: F.<a>=GF(2**8, repr="log") > sage: PR.<x>=PolynomialRing(F) > sage: f=PR.random_element(9) > sage: b=F.random_element() > sage: f(b) > --------------------------------------------------------------------------- > NameError Traceback (most recent call last) > <ipython-input-5-a6714ffdcf66> in <module>() > ----> 1 f(b) > > /home/local/user/sage/sage-6.2-x86_64-Linux/local/lib/python2.7/site-package > s/sage/rings/polynomial/polynomial_zz_pex.so in > sage.rings.polynomial.polynomial_zz_pex.Polynomial_ZZ_pEX.__call__ > (sage/rings/polynomial/polynomial_zz_pex.cpp:14427)() > > /home/local/user/sage/sage-6.2-x86_64-Linux/local/lib/python2.7/site-package > s/sage/structure/parent.so in sage.structure.parent.Parent.__call__ > (sage/structure/parent.c:8858)() > > /home/local/user/sage/sage-6.2-x86_64-Linux/local/lib/python2.7/site-package > s/sage/structure/coerce_maps.so in > sage.structure.coerce_maps.DefaultConvertMap_unique._call_ > (sage/structure/coerce_maps.c:4206)() > > /home/local/user/sage/sage-6.2-x86_64-Linux/local/lib/python2.7/site-package > s/sage/structure/coerce_maps.so in > sage.structure.coerce_maps.DefaultConvertMap_unique._call_ > (sage/structure/coerce_maps.c:4113)() > > /home/local/user/sage/sage-6.2-x86_64-Linux/local/lib/python2.7/site-package > s/sage/rings/finite_rings/finite_field_givaro.pyc in > _element_constructor_(self, e) 355 2*a4^3 + 2*a4^2 + 1 > 356 """ > --> 357 return self._cache.element_from_data(e) > 358 > 359 def gen(self, n=0): > > /home/local/user/sage/sage-6.2-x86_64-Linux/local/lib/python2.7/site-package > s/sage/rings/finite_rings/element_givaro.so in > sage.rings.finite_rings.element_givaro.Cache_givaro.element_from_data > (sage/rings/finite_rings/element_givaro.cpp:6459)() > > /home/local/user/sage/sage-6.2-x86_64-Linux/local/lib/python2.7/site-package > s/sage/rings/finite_rings/element_givaro.so in > sage.rings.finite_rings.element_givaro.Cache_givaro.element_from_data > (sage/rings/finite_rings/element_givaro.cpp:5381)() > > <string> in <module>()
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