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8 votes
2 answers
387 views

Are we able to estimate the fraction of the domain where $\cos (ax)+2\cos (b x)$ with $\frac ab \notin\mathbb{Q}$ is positive?

We know that the two functions $\{\;\cos (ax),\;2\cos (b x)\;\}$ where $\frac ab \notin \mathbb{Q}$ are independently positive (and negative) over $\frac 12$ of the domain. Is it possible to estimate ...
3 votes
1 answer
315 views

Distribution of the first occurrence of a maximum (record) run of zeros in the digits of a normal number (say $\pi$)

If the question was stated to appeal to the general public, it would be something like this. For a number such as $\pi$ or $\sqrt{2}$, the digits in base $b$ appear to be randomly distributed. We are ...
3 votes
2 answers
1k views

Irrational number with known probability distribution on digits

Is there any irrational number that is known the probability distribution of digits? Something like 0 appears 10% of time, 1 appears 10% of time, etc. Probably irrational numbers that are defined ...