My question is quite simple.
As far as I know, rational numbers has finite continued fraction representation. And if for any number we have infinite continued fraction, then it necessarily is irrational.
This help us to make distinction between rationals and irrationals.
My question is, are their any criteria (of form of continued fraction) which will give distinction between algebraic irrationals and transcendental irrationals.(Maybe some pattern is prohibited for transcendental numbers, or some pattern is required.)
Sorry if this question sound stupid.
Thank you.
Best Answer
The question is still being researched, some results are known, some are conjectured.
For examples if continued fraction is periodic then it represents a quadratic irrational number
from this book, page 94. Same result in Khinchin's famous book, page 48. To some extent - spread here.
From here
and here is a good paper highlighting some of the latest developments.
And of course Liouville's theorem, quoting Khinchin's book, page 46
this includes the best rational approximations (generated by simple continued fractions) as well.