...

diff --git a/helm/software/matita/nlibrary/topology/igft.ma b/helm/software/matita/nlibrary/topology/igft.ma
index c8317f37e63fd024d6be7fdf06bc4f27ab04671e..81aefd555f02c320104e47f3d272fbf5301c6673 100644 (file)
--- a/helm/software/matita/nlibrary/topology/igft.ma
+++ b/helm/software/matita/nlibrary/topology/igft.ma
@@ -21,7 +21,7 @@ to make the formalization (at least the definitions and proved
 statements) readable to the author of the paper. 
 
 Orienteering
------------
+------------
 
 The graphical interface of Matita is composed of three windows:
 the script window, on the left, is where you type; the sequent
@@ -60,13 +60,13 @@ implements two unusual input facilities:
   to mean double or single arrows.
   Here we recall some of these "shortcuts":
 
-  - ∀ `\Forall`
-  - λ `\lambda`
-  - ≝ `\def` or `:=`
-  - → `to` or `->`
+  - ∀ can be typed with `\Forall`
+  - λ can be typed with `\lambda`
+  - ≝ can be typed with `\def` or `:=`
+  - → can be typed with `to` or `->`
   
-- some symbols have variants, like the â\89¤ relation and â\89², â\89¼, â\89°, â\8b .
-  The use can cycle between variants typing one them and then
+- some symbols have variants, like the ≤ relation and ≼, ≰, ⋠.
+  The user can cycle between variants typing one of them and then
   pressing ALT-L. Note that also letters do have variants, for
   example W has Ω, 𝕎 and 𝐖, L has Λ, 𝕃, and 𝐋, F has Φ, … 
   Variants are listed in the aforementioned TeX/UTF-8 table.