What does a full stop mean in maths?

Answer 1

A full stop, particularly in algebra, may represent multiplication.

In vector algebra, it represents particular type of product of vectors: the dot product or scalar product.

In arithmetic a full stop (in many countries) is the decimal point: a symbol that separates digits whose place value is one or more from those whose place value is a tenth or less. In these countries a comma is often used to delimit thousands in large numbers. However, you should be aware that there are many countries - particularly in Europe - where the role of the full stop and comma is swapped.