Version 4.8.0

Author: fingolfin

CHANGES.md

@@ -1,5 +1,21 @@
 # Version history of the RCWA package
 
+## Changes between RCWA 4.7.1 and RCWA 4.8.0 (September 22, 2025):
+
+  - Fixed an error in the database of products of 2 class transpositions
+    which has been found by a recomputation of the data (the order of
+    (9(10),0(12)) * (1(11),10(11)) is not 12, but 60).
+  - Added a function CTPairIntersectionTypeNumber to the database of
+    products of two class transpositions
+  - Fixed representation issue in ImagesSet(f,cl): if both inputs
+    are sparse, then output now is as well
+  - Added preliminary support for operations `PreImagesNC`,
+    `PreImagesElmNC`, `PreImagesSetNC`, `PreImagesRepresentativeNC`
+    (for now they are just synonyms to their non-NC counterparts,
+    but future GAP versions may change that)
+  - Avoid use of `InstallValue` on non-plain objects in preparation
+    for some future GAP version possibly dropping support for this.
+
 ## Changes between RCWA 4.7.0 and RCWA 4.7.1 (December 6, 2022):
 
   - Added a global switch `CTSparse` to choose sparse representation

PackageInfo.g

@@ -8,8 +8,8 @@ SetPackageInfo( rec(
 
 PackageName      := "RCWA",
 Subtitle         := "Residue-Class-Wise Affine Groups",
-Version          := "4.7.1",
-Date             := "06/12/2022", # dd/mm/yyyy format
+Version          := "4.8.0",
+Date             := "22/09/2025", # dd/mm/yyyy format
 License          := "GPL-2.0-or-later",
 Persons          := [
                       rec( LastName      := "Kohl",

README.md

@@ -37,7 +37,7 @@ browser, or its PDF version (manual.pdf) with a PDF viewer.
 
 ## Requirements
 
-This version of  RCWA needs  GAP >=4.9.0 in 64-bit mode,  ResClasses >=4.7.0,
+This version of RCWA needs  GAP >=4.11.1 in 64-bit mode, ResClasses >=4.7.1,
 GRAPE >=4.7, Polycyclic >=2.11, FR >=2.2.1,  GAPDoc >=1.5.1 and Utils >=0.40.
 All required  packages  are already present  in a standard  GAP installation.
 RCWA  can  be  used  on  all  platforms  for  which  GAP is available.  It is