olemus
logaritmi esituse mittenegatiivne murdosa

Wiktionary:
2. (mathematics) the part of a common logarithm after the decimal point, the fractional part of a logarithm

ülevaateid
https://en.wikipedia.org/wiki/Common_logarithm#Mantissa_and_characteristic

https://www.mathdoubts.com/mantissa/

https://www.math-only-math.com/common-logarithm-and-natural-logarithm.html