--- a/src/HOL/BNF_Cardinal_Arithmetic.thy Mon Sep 23 15:01:10 2024 +0200
+++ b/src/HOL/BNF_Cardinal_Arithmetic.thy Mon Sep 23 21:09:23 2024 +0200
@@ -273,7 +273,7 @@
(* Similar setup to the one for SIGMA from theory Big_Operators: *)
syntax "_Csum" ::
"pttrn => ('a * 'a) set => 'b * 'b set => (('a * 'b) * ('a * 'b)) set"
- (\<open>(3CSUM _:_. _)\<close> [0, 51, 10] 10)
+ (\<open>(\<open>indent=3 notation=\<open>binder CSUM\<close>\<close>CSUM _:_. _)\<close> [0, 51, 10] 10)
syntax_consts
"_Csum" == Csum