Some arithmetical properties of convergents to algebraic numbers
Bibliographic record
Abstract
Let ξ be an irrational algebraic real number and let ( p k /q k ) k≥1 denote the sequence of its convergents.Let (u n ) n≥1 be a nondegenerate linear recurrence sequence of integers, which is not a polynomial sequence.We show that if the intersection of the sequences (q k ) k≥1 and (u n ) n≥1 is infinite, then ξ is a quadratic number.This extends an earlier work of Lenstra and Shallit (1993).We also discuss several arithmetical properties of the base-b representation of the integers q k , k ≥ 1, where b ≥ 2 is an integer.Finally, when ξ is a (possibly transcendental) non-Liouville number, we prove a result implying the existence of a large prime factor of q k-1 q k q k+1 for large k.This is related to earlier results of Erdős and Mahler (1939), Shorey andStewart (1983), andShparlinskii (1987).
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.015 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.003 | 0.003 |
| Science and technology studies | 0.002 | 0.005 |
| Scholarly communication | 0.005 | 0.006 |
| Open science | 0.001 | 0.002 |
| Research integrity | 0.001 | 0.003 |
| Insufficient payload (model declined to judge) | 0.008 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".