diff --git a/src/sage/matroids/utilities.py b/src/sage/matroids/utilities.py index 7a38577fe00..2d7e2607c31 100644 --- a/src/sage/matroids/utilities.py +++ b/src/sage/matroids/utilities.py @@ -546,16 +546,16 @@ def lift_map(target): Depending on the value of ``target``, the following lift maps will be created: - - `reg`: a lift map from `GF(3)` to the regular partial field `(Z, <-1>)`. + - "reg": a lift map from `\GF3` to the regular partial field `(\ZZ, <-1>)`. - - `sru`: a lift map from `GF(7)` to the - sixth-root-of-unity partial field `(Q(z) )`, where `z` is a sixth-root. - The map sends 3 to `z`. + - "sru": a lift map from `\GF7` to the + sixth-root-of-unity partial field `(\QQ(z), )`, where `z` is a sixth root + of unity. The map sends 3 to `z`. - - `dyadic`: a lift map from `GF(11)` to the dyadic partial field `(Q, <-1, 2>)`. + - "dyadic": a lift map from `\GF{11}` to the dyadic partial field `(\QQ, <-1, 2>)`. - - `gm`: a lift map from `GF(19)` to the golden mean partial field - `(Q(t), <-1,t>)`, where `t` is a root of `t^2-t-1`. The map sends `5` to `t`. + - "gm": a lift map from `\GF{19}` to the golden mean partial field + `(\QQ(t), <-1,t>)`, where `t` is a root of `t^2-t-1`. The map sends `5` to `t`. The example below shows that the latter map satisfies three necessary conditions stated in :meth:`lift_cross_ratios() `