- In mathematics, division by zero, division where the divisor (denominator) is zero, is a unique and problematic special case. Using fraction notation, the general example can be written as a/0 where a is the dividend (numerator).
- Wasat (stars.astro.illinois.edu)
WASAT (Delta Geminorum). With a name that does not ring much of a bell among astronomers, and shining only at the bright end of fourth magnitude, neither does the star itself.