Oh thanks. I know it is based on "infinite" stream (lazy aggregate), but how to modify its limits was cryptic to me. Many thanks Ralf, I think this is what I was looking for.
Greg PS: that helps a lot ;) Le jeu. 3 avr. 2025 à 21:08, 'Ralf Hemmecke' via FriCAS - computer algebra system <fricas-devel@googlegroups.com> a écrit : > Hi Greg, > > I bet, the "precision" is infinite. > > You can see this from its representation. > > https://github.com/fricas/fricas/blob/master/src/algebra/padic.spad#L77 > > It is a Stream for the coefficients. And that is an potentially infinite > object. (OK, it is a finite stream of coefficients for i^7. But -i looks > pretty infiniite to me. > > Use ")set stream calculate n" to determine how many "digits" are > printed. That system command will, however, not change the "precision. > It's still infinite. > > Hope that helps > Ralf > > > %%% (2) -> i:=19::PAdicInteger(7) > > (2) 5 + 2 7 > Type: PAdicInteger(7) > %%% (3) -> i^7 > > 3 4 5 6 8 9 10 11 > (3) 5 + 2 7 + 3 7 + 3 7 + 5 7 + 2 7 + 7 + 7 + 3 7 + O(7 ) > Type: PAdicInteger(7) > %%% (4) -> )set stream calc 4 > > %%% (4) -> i^7 > > 3 4 5 > (4) 5 + 2 7 + 3 7 + 3 7 + O(7 ) > Type: PAdicInteger(7) > %%% (5) -> )set stream calc 40 > > %%% (5) -> i^7 > > 3 4 5 6 8 9 10 > (5) 5 + 2 7 + 3 7 + 3 7 + 5 7 + 2 7 + 7 + 7 + 3 7 > Type: PAdicInteger(7) > %%% (7) -> -i > > (7) > 2 3 4 5 6 7 8 9 > 10 > 2 + 4 7 + 6 7 + 6 7 + 6 7 + 6 7 + 6 7 + 6 7 + 6 7 + 6 7 + 6 7 > + > 11 12 13 14 15 16 17 18 19 > 6 7 + 6 7 + 6 7 + 6 7 + 6 7 + 6 7 + 6 7 + 6 7 + 6 7 > + > 20 21 22 23 24 25 26 27 28 > 6 7 + 6 7 + 6 7 + 6 7 + 6 7 + 6 7 + 6 7 + 6 7 + 6 7 > + > 29 30 31 32 33 34 35 36 37 > 6 7 + 6 7 + 6 7 + 6 7 + 6 7 + 6 7 + 6 7 + 6 7 + 6 7 > + > 38 39 40 41 > 6 7 + 6 7 + 6 7 + O(7 ) > Type: PAdicInteger(7) > > -- > You received this message because you are subscribed to the Google Groups > "FriCAS - computer algebra system" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to fricas-devel+unsubscr...@googlegroups.com. > To view this discussion visit > https://groups.google.com/d/msgid/fricas-devel/2c428ba8-cb39-4cec-99a2-1ea8d99d90f4%40hemmecke.org > . > -- You received this message because you are subscribed to the Google Groups "FriCAS - computer algebra system" group. To unsubscribe from this group and stop receiving emails from it, send an email to fricas-devel+unsubscr...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/fricas-devel/CAHnU2db9TAHdE0LP2no7a045YHf2xpbYvCkGiHKZvNe2%3DWbjgg%40mail.gmail.com.
