What do you prefer,
1 \times 10^{10} or 1E10.This section is about numbers that we don't know if they are rational or not.
Bibliography:
- www.quantamagazine.org/rational-or-not-this-basic-math-question-took-decades-to-answer-20250108/ Rational or Not? This Basic Math Question Took Decades to Answer (2025)
A "reduced fraction" is a fraction that has the smallest possible integer numerator and denominator for its value.
For example:is not a reduced fraction, because there is another fraction equal to it but with smaller numerator and denominator:
en.wikipedia.org/w/index.php?title=Farey_sequence&oldid=1223364653#Sequence_length_and_index_of_a_fractionwhere is the totient summatory function.
A good definition is by using Dedekind cuts.
