BEGINTEST
ȷȷ LATIN SMALL LETTER DOTLESS J
˙˙ DOT ABOVE
- ΓΓ GREEK CAPITAL LETTER GAMMA
- ΣΣ GREEK CAPITAL LETTER SIGMA
‾‾ OVERLINE
ℏℏℏ PLANCK CONSTANT OVER TWO PI
℘℘ SCRIPT CAPITAL P
↕↕ UP DOWN ARROW
⇕⇕ UP DOWN DOUBLE ARROW
- ∇∇ NABLA
- ∉∉ NOT AN ELEMENT OF
∏∏ N-ARY PRODUCT
∐∐ N-ARY COPRODUCT
∑∑ N-ARY SUMMATION