Editing Mathematical coincidence (section)

{{short description|Coincidence in mathematics}}
{{About|numerical curiosities|the technical mathematical concept of coincidence|Coincidence point}}

A '''mathematical coincidence''' is said to occur when two expressions with no direct relationship show a near-equality which has no apparent theoretical explanation.

For example, there is a near-equality close to the [[round number]] 1000 between powers of 2 and powers of 10:
: <math>2^{10} = 1024 \approx 1000 = 10^3.</math>

Some mathematical coincidences are used in [[engineering]] when one expression is taken as an approximation of another.