3 ms·
I assume it means "zero with a line through it" which was used on older computers to distinguish zeroes from the letter O on low res screens.
by rahoulb 13y ago
I assume it means "zero with a line through it" which was used on older computers to distinguish zeroes from the letter O on low res screens.
- lloeki 13y agoOr empty set as noted by Bourbaki. I can't help but read it that way anyway.
- tel 13y agoThat's always been my reading as well.
- cdcarter 13y agoActually, it long predates computers, handwritten and typeset materials as far back as the 12th century use it. As it turns out, it's frustrating when two common characters look so similar.