a suggestive notation!

being unable to think of anything else that fits, once again i used the capital Greek letter $\Xi$ .. but today, it's to denote slices of sets in Euclidean spaces.

here's my rhetorick:

• the symbol is essentially three horizontal lines, which look like slices;
• its pronunciation, a /zaɪ/ sound as in "zion", is in keeping with how i would pronounce "slice" ..!

on a related note, one of my colleagues is originally from greece. every time he gives a talk, i pay a lot of attention to his handwriting ..

.. for it's not every day that you get to see a greek actually writing greek!