2018-05-31 20:45:31 -0500 received badge ● Scholar (source) 2018-05-22 09:36:23 -0500 commented question Evaluating the error "Can only substitute elements of positive valuation" Is there no way to evaluate, even if it's just a numeric approximation the power-series at a value of z? 2018-05-21 12:15:33 -0500 asked a question Evaluating the error "Can only substitute elements of positive valuation" I'm trying to work with sage's weierstrass_p function for elliptic curves, and I'm getting an error that I can't interpret. This is what I'm running, E = EllipticCurve('11a1') WP = E.weierstrass_p() L = E.lseries() WP(L(1))  The error I'm getting is "Can only substitute elements of positive valuation" And I just don't know why sage doesn't want to evaluate the function at the given value. Any thoughts would be really appreciated!