diff --git a/_data/core.yml b/_data/core.yml
index d11caf2..7407655 100644
--- a/_data/core.yml
+++ b/_data/core.yml
@@ -210,6 +210,37 @@ defaultfixity:
characters: [U+2062]
+largeop:
+ - concept: sum
+ characters: [∑,⅀]
+ - concept: product
+ characters: [∏,⨉]
+ - concept: union
+ characters: [⋃]
+ - concept: intersection
+ characters: [⋂]
+ - concept: logical-and
+ characters: [⋀]
+ - concept: logical-or
+ characters: [⋁]
+ - concept: integral
+ characters: [∫]
+ - concept: double-integral
+ characters: [∬]
+ - concept: triple-integral
+ characters: [∭]
+ - concept: contour-integral
+ characters: [∮]
+ - concept: surface-integral
+ characters: [∯]
+ - concept: clockwise-integral
+ characters: [∱]
+ - concept: clockwise-contour-integral
+ characters: [∲]
+ - concept: anticlockwise-contour-integral
+ characters: [∳]
+
+
concepts:
## From chapter 4 of MathML3
@@ -293,9 +324,9 @@ concepts:
en: $1 evaluated-at $2
comments:
- "Two common notations are
-
+
and
-